/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 17:04:25,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 17:04:25,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 17:04:25,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 17:04:25,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 17:04:25,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 17:04:25,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 17:04:25,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 17:04:25,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 17:04:25,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 17:04:25,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 17:04:25,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 17:04:25,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 17:04:25,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 17:04:25,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 17:04:25,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 17:04:25,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 17:04:25,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 17:04:25,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 17:04:25,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 17:04:25,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 17:04:25,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 17:04:25,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 17:04:25,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 17:04:25,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 17:04:25,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 17:04:25,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 17:04:25,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 17:04:25,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 17:04:25,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 17:04:25,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 17:04:25,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 17:04:25,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 17:04:25,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 17:04:25,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 17:04:25,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 17:04:25,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 17:04:25,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 17:04:25,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 17:04:25,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 17:04:25,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 17:04:25,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 17:04:25,823 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 17:04:25,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 17:04:25,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 17:04:25,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 17:04:25,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 17:04:25,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 17:04:25,827 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 17:04:25,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 17:04:25,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 17:04:25,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 17:04:25,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 17:04:25,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 17:04:25,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 17:04:25,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 17:04:25,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 17:04:25,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 17:04:25,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 17:04:25,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 17:04:25,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 17:04:25,830 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 17:04:25,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 17:04:25,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 17:04:26,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 17:04:26,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 17:04:26,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 17:04:26,157 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 17:04:26,158 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 17:04:26,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl [2021-05-03 17:04:26,159 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl' [2021-05-03 17:04:26,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 17:04:26,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 17:04:26,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 17:04:26,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 17:04:26,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 17:04:26,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 17:04:26,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 17:04:26,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 17:04:26,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 17:04:26,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... [2021-05-03 17:04:26,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 17:04:26,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 17:04:26,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 17:04:26,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 17:04:26,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 17:04:26,305 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 17:04:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 17:04:26,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 17:04:26,305 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 17:04:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 17:04:26,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 17:04:26,305 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 17:04:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 17:04:26,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 17:04:26,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 17:04:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 17:04:26,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 17:04:26,307 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 17:04:26,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 17:04:26,449 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 17:04:26,450 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:04:26 BoogieIcfgContainer [2021-05-03 17:04:26,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 17:04:26,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 17:04:26,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 17:04:26,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 17:04:26,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:04:26" (1/2) ... [2021-05-03 17:04:26,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e14b9b6 and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 05:04:26, skipping insertion in model container [2021-05-03 17:04:26,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:04:26" (2/2) ... [2021-05-03 17:04:26,456 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2021-05-03 17:04:26,459 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 17:04:26,459 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 17:04:26,471 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 17:04:26,471 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 17:04:26,538 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 17:04:26,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 17:04:26,570 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 17:04:26,571 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 17:04:26,571 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 17:04:26,571 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 17:04:26,571 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 17:04:26,571 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 17:04:26,571 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 17:04:26,571 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 17:04:26,577 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-05-03 17:04:26,590 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 17:04:26,597 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:26,597 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:26,598 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-05-03 17:04:26,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:26,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832747607] [2021-05-03 17:04:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:26,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832747607] [2021-05-03 17:04:26,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:04:26,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:04:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820991981] [2021-05-03 17:04:26,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:04:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:04:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:04:26,749 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:26,818 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-05-03 17:04:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:04:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 17:04:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:26,834 INFO L225 Difference]: With dead ends: 154 [2021-05-03 17:04:26,834 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 17:04:26,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:04:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 17:04:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-05-03 17:04:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-05-03 17:04:26,894 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-05-03 17:04:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:26,895 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-05-03 17:04:26,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-05-03 17:04:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 17:04:26,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:26,898 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:26,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 17:04:26,899 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-05-03 17:04:26,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:26,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633016644] [2021-05-03 17:04:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:26,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633016644] [2021-05-03 17:04:26,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:04:26,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 17:04:26,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289873987] [2021-05-03 17:04:26,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 17:04:26,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 17:04:26,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 17:04:26,971 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:26,997 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-05-03 17:04:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 17:04:26,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 17:04:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:26,999 INFO L225 Difference]: With dead ends: 158 [2021-05-03 17:04:26,999 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 17:04:26,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:04:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 17:04:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-03 17:04:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-05-03 17:04:27,006 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-05-03 17:04:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:27,007 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-05-03 17:04:27,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-05-03 17:04:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 17:04:27,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:27,008 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:27,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 17:04:27,009 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-05-03 17:04:27,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:27,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536378929] [2021-05-03 17:04:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:27,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536378929] [2021-05-03 17:04:27,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779772694] [2021-05-03 17:04:27,233 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 [2021-05-03 17:04:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:04:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 17:04:27,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:27,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-05-03 17:04:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:27,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:27,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:27,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368977356] [2021-05-03 17:04:27,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:27,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:27,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:27,602 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:27,850 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-05-03 17:04:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:04:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 17:04:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:27,857 INFO L225 Difference]: With dead ends: 330 [2021-05-03 17:04:27,857 INFO L226 Difference]: Without dead ends: 315 [2021-05-03 17:04:27,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:04:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-03 17:04:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-05-03 17:04:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-05-03 17:04:27,884 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-05-03 17:04:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:27,884 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-05-03 17:04:27,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-05-03 17:04:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 17:04:27,887 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:27,887 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:28,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 17:04:28,088 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-05-03 17:04:28,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:28,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787136419] [2021-05-03 17:04:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:28,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787136419] [2021-05-03 17:04:28,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025974710] [2021-05-03 17:04:28,296 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 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 [2021-05-03 17:04:28,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:04:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:28,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 17:04:28,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:04:28,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:28,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:28,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-05-03 17:04:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:28,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:28,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-03 17:04:28,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602580570] [2021-05-03 17:04:28,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:28,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:28,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:28,561 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:28,929 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-05-03 17:04:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:04:28,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 17:04:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:28,931 INFO L225 Difference]: With dead ends: 374 [2021-05-03 17:04:28,931 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 17:04:28,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:04:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 17:04:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-03 17:04:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-05-03 17:04:28,938 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-05-03 17:04:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:28,938 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-05-03 17:04:28,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-05-03 17:04:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 17:04:28,939 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:28,939 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:29,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:29,153 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:29,154 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-05-03 17:04:29,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:29,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654180486] [2021-05-03 17:04:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:29,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654180486] [2021-05-03 17:04:29,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668015791] [2021-05-03 17:04:29,290 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 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 [2021-05-03 17:04:29,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:04:29,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 17:04:29,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:29,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 17:04:29,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:29,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:29,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:29,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-05-03 17:04:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:29,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:29,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:04:29,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474375471] [2021-05-03 17:04:29,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:04:29,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:29,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:04:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:04:29,444 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:29,574 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-05-03 17:04:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:04:29,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 22 [2021-05-03 17:04:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:29,576 INFO L225 Difference]: With dead ends: 296 [2021-05-03 17:04:29,576 INFO L226 Difference]: Without dead ends: 281 [2021-05-03 17:04:29,577 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:04:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-03 17:04:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-05-03 17:04:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-05-03 17:04:29,583 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-05-03 17:04:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:29,583 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-05-03 17:04:29,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-05-03 17:04:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 17:04:29,584 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:29,584 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:29,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:29,793 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-05-03 17:04:29,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:29,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733425280] [2021-05-03 17:04:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:29,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733425280] [2021-05-03 17:04:29,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445883897] [2021-05-03 17:04:29,961 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 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 [2021-05-03 17:04:29,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:29,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:04:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:30,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:30,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 17:04:30,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:04:30,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:30,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:30,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-05-03 17:04:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:30,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:30,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:30,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333176929] [2021-05-03 17:04:30,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:30,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:30,167 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:30,379 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-05-03 17:04:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:04:30,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-05-03 17:04:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:30,381 INFO L225 Difference]: With dead ends: 425 [2021-05-03 17:04:30,381 INFO L226 Difference]: Without dead ends: 410 [2021-05-03 17:04:30,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:04:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-03 17:04:30,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-05-03 17:04:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-05-03 17:04:30,391 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-05-03 17:04:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:30,391 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-05-03 17:04:30,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-05-03 17:04:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:30,392 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:30,392 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:30,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:30,605 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-05-03 17:04:30,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:30,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627212130] [2021-05-03 17:04:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:30,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627212130] [2021-05-03 17:04:30,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221815302] [2021-05-03 17:04:30,652 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 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 [2021-05-03 17:04:30,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:04:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:30,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:30,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:30,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:04:30,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526176100] [2021-05-03 17:04:30,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:30,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:30,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:30,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:30,764 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:04:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:31,124 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-05-03 17:04:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:04:31,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-05-03 17:04:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:31,127 INFO L225 Difference]: With dead ends: 619 [2021-05-03 17:04:31,127 INFO L226 Difference]: Without dead ends: 619 [2021-05-03 17:04:31,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:04:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-05-03 17:04:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-05-03 17:04:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-05-03 17:04:31,134 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-05-03 17:04:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:31,135 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-05-03 17:04:31,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:04:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-05-03 17:04:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:31,135 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:31,135 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:31,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 17:04:31,351 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:31,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-05-03 17:04:31,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:31,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809286604] [2021-05-03 17:04:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:31,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809286604] [2021-05-03 17:04:31,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948350856] [2021-05-03 17:04:31,408 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 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 [2021-05-03 17:04:31,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:04:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:31,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:31,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:31,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:31,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314521148] [2021-05-03 17:04:31,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:31,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:31,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:31,526 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:32,296 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-05-03 17:04:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:04:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:32,301 INFO L225 Difference]: With dead ends: 1078 [2021-05-03 17:04:32,301 INFO L226 Difference]: Without dead ends: 1078 [2021-05-03 17:04:32,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:04:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-05-03 17:04:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-05-03 17:04:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-05-03 17:04:32,312 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-05-03 17:04:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:32,313 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-05-03 17:04:32,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-05-03 17:04:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:32,314 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:32,314 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:32,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:32,529 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:32,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-05-03 17:04:32,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:32,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008161578] [2021-05-03 17:04:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008161578] [2021-05-03 17:04:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095863466] [2021-05-03 17:04:32,564 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 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 [2021-05-03 17:04:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:32,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:32,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:32,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:32,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:32,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463629451] [2021-05-03 17:04:32,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:32,701 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:33,357 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-05-03 17:04:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 17:04:33,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:33,361 INFO L225 Difference]: With dead ends: 951 [2021-05-03 17:04:33,362 INFO L226 Difference]: Without dead ends: 951 [2021-05-03 17:04:33,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:04:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-03 17:04:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-05-03 17:04:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-05-03 17:04:33,374 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-05-03 17:04:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:33,374 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-05-03 17:04:33,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-05-03 17:04:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:33,375 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:33,375 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:33,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:33,592 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-05-03 17:04:33,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:33,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880675159] [2021-05-03 17:04:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:33,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880675159] [2021-05-03 17:04:33,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277711351] [2021-05-03 17:04:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:04:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:33,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:04:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:33,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:33,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:04:33,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837730302] [2021-05-03 17:04:33,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:04:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:04:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:04:33,692 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-05-03 17:04:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:33,819 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-05-03 17:04:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:04:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-05-03 17:04:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:33,822 INFO L225 Difference]: With dead ends: 669 [2021-05-03 17:04:33,822 INFO L226 Difference]: Without dead ends: 663 [2021-05-03 17:04:33,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-05-03 17:04:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-05-03 17:04:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-05-03 17:04:33,833 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-05-03 17:04:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:33,833 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-05-03 17:04:33,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-05-03 17:04:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-05-03 17:04:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:33,834 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:33,834 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:34,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 17:04:34,050 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-05-03 17:04:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:34,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272276370] [2021-05-03 17:04:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:34,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272276370] [2021-05-03 17:04:34,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887610154] [2021-05-03 17:04:34,086 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 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 [2021-05-03 17:04:34,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:34,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:34,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:34,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:04:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887106987] [2021-05-03 17:04:34,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:34,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:34,191 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:34,363 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-05-03 17:04:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:04:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:34,366 INFO L225 Difference]: With dead ends: 710 [2021-05-03 17:04:34,366 INFO L226 Difference]: Without dead ends: 672 [2021-05-03 17:04:34,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:04:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-05-03 17:04:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-05-03 17:04:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-05-03 17:04:34,383 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-05-03 17:04:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:34,384 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-05-03 17:04:34,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-05-03 17:04:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:34,386 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:34,386 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:34,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 17:04:34,597 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-05-03 17:04:34,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:34,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446809795] [2021-05-03 17:04:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446809795] [2021-05-03 17:04:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735717485] [2021-05-03 17:04:34,626 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 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 [2021-05-03 17:04:34,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:34,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:04:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:34,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:34,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:04:34,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313021246] [2021-05-03 17:04:34,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:04:34,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:34,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:04:34,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:04:34,721 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-05-03 17:04:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:34,830 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-05-03 17:04:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:04:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-05-03 17:04:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:34,834 INFO L225 Difference]: With dead ends: 830 [2021-05-03 17:04:34,834 INFO L226 Difference]: Without dead ends: 830 [2021-05-03 17:04:34,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-03 17:04:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-05-03 17:04:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-05-03 17:04:34,850 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-05-03 17:04:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:34,850 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-05-03 17:04:34,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-05-03 17:04:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-05-03 17:04:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:34,852 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:34,852 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:35,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 17:04:35,061 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-05-03 17:04:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:35,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39465900] [2021-05-03 17:04:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39465900] [2021-05-03 17:04:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679200872] [2021-05-03 17:04:35,100 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 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 [2021-05-03 17:04:35,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:04:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:35,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:35,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:35,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:35,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731254265] [2021-05-03 17:04:35,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:04:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:35,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:04:35,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:04:35,203 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-05-03 17:04:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:35,480 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-05-03 17:04:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:04:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-05-03 17:04:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:35,485 INFO L225 Difference]: With dead ends: 1196 [2021-05-03 17:04:35,485 INFO L226 Difference]: Without dead ends: 1196 [2021-05-03 17:04:35,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:04:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-05-03 17:04:35,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-05-03 17:04:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-05-03 17:04:35,527 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-05-03 17:04:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:35,527 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-05-03 17:04:35,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-05-03 17:04:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-05-03 17:04:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:35,528 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:35,528 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:35,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 17:04:35,745 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:35,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-05-03 17:04:35,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:35,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302410699] [2021-05-03 17:04:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:35,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302410699] [2021-05-03 17:04:35,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400097539] [2021-05-03 17:04:35,794 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 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 [2021-05-03 17:04:35,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:35,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:35,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:35,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:35,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:35,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844723011] [2021-05-03 17:04:35,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:04:35,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:04:35,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:04:35,937 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-05-03 17:04:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:36,552 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-05-03 17:04:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 17:04:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-05-03 17:04:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:36,558 INFO L225 Difference]: With dead ends: 1492 [2021-05-03 17:04:36,558 INFO L226 Difference]: Without dead ends: 1492 [2021-05-03 17:04:36,558 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:04:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-05-03 17:04:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-05-03 17:04:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-05-03 17:04:36,578 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-05-03 17:04:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:36,578 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-05-03 17:04:36,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-05-03 17:04:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-05-03 17:04:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:36,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:36,579 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:36,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 17:04:36,793 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-05-03 17:04:36,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:36,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589150459] [2021-05-03 17:04:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:36,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589150459] [2021-05-03 17:04:36,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095277172] [2021-05-03 17:04:36,913 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 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 [2021-05-03 17:04:36,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:36,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:37,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:37,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:04:37,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740041945] [2021-05-03 17:04:37,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:37,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:37,048 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:37,290 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-05-03 17:04:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:04:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:37,296 INFO L225 Difference]: With dead ends: 1258 [2021-05-03 17:04:37,296 INFO L226 Difference]: Without dead ends: 1248 [2021-05-03 17:04:37,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:04:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-03 17:04:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-05-03 17:04:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-05-03 17:04:37,316 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-05-03 17:04:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:37,316 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-05-03 17:04:37,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-05-03 17:04:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:37,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:37,318 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:37,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:37,534 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-05-03 17:04:37,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:37,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90622809] [2021-05-03 17:04:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90622809] [2021-05-03 17:04:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068140634] [2021-05-03 17:04:37,574 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 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 [2021-05-03 17:04:37,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:04:37,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:37,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:37,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:04:37,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289868230] [2021-05-03 17:04:37,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:37,687 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-05-03 17:04:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:37,945 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-05-03 17:04:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:04:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-05-03 17:04:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:37,950 INFO L225 Difference]: With dead ends: 1329 [2021-05-03 17:04:37,950 INFO L226 Difference]: Without dead ends: 1329 [2021-05-03 17:04:37,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:04:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-03 17:04:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-05-03 17:04:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-05-03 17:04:37,967 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-05-03 17:04:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:37,967 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-05-03 17:04:37,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-05-03 17:04:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-05-03 17:04:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:37,969 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:37,969 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:38,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:38,185 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-05-03 17:04:38,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:38,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129408130] [2021-05-03 17:04:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:38,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129408130] [2021-05-03 17:04:38,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539315809] [2021-05-03 17:04:38,227 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 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 [2021-05-03 17:04:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:38,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:38,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:38,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566213114] [2021-05-03 17:04:38,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:04:38,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:38,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:04:38,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:04:38,304 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-05-03 17:04:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:38,670 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-05-03 17:04:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:04:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-05-03 17:04:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:38,676 INFO L225 Difference]: With dead ends: 1548 [2021-05-03 17:04:38,676 INFO L226 Difference]: Without dead ends: 1544 [2021-05-03 17:04:38,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:04:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-05-03 17:04:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-05-03 17:04:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-05-03 17:04:38,698 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-05-03 17:04:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:38,698 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-05-03 17:04:38,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-05-03 17:04:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-05-03 17:04:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:38,699 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:38,700 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:38,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 17:04:38,915 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:38,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-05-03 17:04:38,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:38,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874519717] [2021-05-03 17:04:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:38,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874519717] [2021-05-03 17:04:38,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847506992] [2021-05-03 17:04:38,948 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 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 [2021-05-03 17:04:38,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:38,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:39,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:39,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:39,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749550579] [2021-05-03 17:04:39,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:39,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:39,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:39,162 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:39,897 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-05-03 17:04:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:04:39,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:39,908 INFO L225 Difference]: With dead ends: 2734 [2021-05-03 17:04:39,908 INFO L226 Difference]: Without dead ends: 2734 [2021-05-03 17:04:39,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:04:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-05-03 17:04:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-05-03 17:04:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-05-03 17:04:39,938 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-05-03 17:04:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:39,938 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-05-03 17:04:39,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-05-03 17:04:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:39,940 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:39,940 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:40,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:40,152 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-05-03 17:04:40,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:40,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940795954] [2021-05-03 17:04:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:40,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940795954] [2021-05-03 17:04:40,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067883081] [2021-05-03 17:04:40,200 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 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 [2021-05-03 17:04:40,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:04:40,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:40,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:40,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:40,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:40,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038652138] [2021-05-03 17:04:40,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:40,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:40,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:40,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:40,325 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:41,034 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-05-03 17:04:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:04:41,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:41,042 INFO L225 Difference]: With dead ends: 2693 [2021-05-03 17:04:41,042 INFO L226 Difference]: Without dead ends: 2693 [2021-05-03 17:04:41,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:04:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-03 17:04:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-05-03 17:04:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-05-03 17:04:41,074 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-05-03 17:04:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:41,074 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-05-03 17:04:41,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-05-03 17:04:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:41,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:41,076 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:41,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 17:04:41,289 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-05-03 17:04:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:41,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457260590] [2021-05-03 17:04:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:41,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457260590] [2021-05-03 17:04:41,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655811134] [2021-05-03 17:04:41,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:41,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:41,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:41,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:41,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:41,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:04:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156718622] [2021-05-03 17:04:41,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:41,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:41,508 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:42,137 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-05-03 17:04:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:04:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:42,152 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 17:04:42,153 INFO L226 Difference]: Without dead ends: 2677 [2021-05-03 17:04:42,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 17:04:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-05-03 17:04:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-05-03 17:04:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-05-03 17:04:42,195 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-05-03 17:04:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:42,196 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-05-03 17:04:42,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-05-03 17:04:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:42,197 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:42,197 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:42,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 17:04:42,413 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-05-03 17:04:42,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:42,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475235365] [2021-05-03 17:04:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:42,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475235365] [2021-05-03 17:04:42,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222454580] [2021-05-03 17:04:42,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:42,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:04:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:42,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:42,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:04:42,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497350860] [2021-05-03 17:04:42,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:42,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:42,573 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:43,116 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-05-03 17:04:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 17:04:43,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:43,122 INFO L225 Difference]: With dead ends: 2474 [2021-05-03 17:04:43,122 INFO L226 Difference]: Without dead ends: 2470 [2021-05-03 17:04:43,122 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 17:04:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-05-03 17:04:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-05-03 17:04:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-05-03 17:04:43,148 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-05-03 17:04:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:43,148 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-05-03 17:04:43,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-05-03 17:04:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:43,150 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:43,150 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:43,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 17:04:43,365 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-05-03 17:04:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:43,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917913701] [2021-05-03 17:04:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:43,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917913701] [2021-05-03 17:04:43,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332791804] [2021-05-03 17:04:43,400 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 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 [2021-05-03 17:04:43,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:04:43,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:43,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:43,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:43,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577914026] [2021-05-03 17:04:43,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:43,541 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:44,203 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-05-03 17:04:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 17:04:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:44,233 INFO L225 Difference]: With dead ends: 2514 [2021-05-03 17:04:44,233 INFO L226 Difference]: Without dead ends: 2514 [2021-05-03 17:04:44,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:04:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-05-03 17:04:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-05-03 17:04:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-05-03 17:04:44,261 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-05-03 17:04:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:44,261 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-05-03 17:04:44,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-05-03 17:04:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:44,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:44,264 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:44,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 17:04:44,477 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-05-03 17:04:44,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:44,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195230880] [2021-05-03 17:04:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:44,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195230880] [2021-05-03 17:04:44,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497232342] [2021-05-03 17:04:44,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:44,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:44,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:44,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:44,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159899357] [2021-05-03 17:04:44,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:44,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:44,606 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:45,199 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-05-03 17:04:45,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 17:04:45,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:45,204 INFO L225 Difference]: With dead ends: 2332 [2021-05-03 17:04:45,204 INFO L226 Difference]: Without dead ends: 2328 [2021-05-03 17:04:45,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 17:04:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-03 17:04:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-05-03 17:04:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-05-03 17:04:45,228 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-05-03 17:04:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:45,228 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-05-03 17:04:45,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-05-03 17:04:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:45,230 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:45,230 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:45,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 17:04:45,445 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-05-03 17:04:45,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:45,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052562550] [2021-05-03 17:04:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:45,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052562550] [2021-05-03 17:04:45,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144420149] [2021-05-03 17:04:45,472 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 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 [2021-05-03 17:04:45,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:04:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:04:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:45,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:45,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 17:04:45,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551181746] [2021-05-03 17:04:45,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 17:04:45,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:45,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 17:04:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:04:45,557 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-05-03 17:04:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:45,627 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-05-03 17:04:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:04:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-05-03 17:04:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:45,633 INFO L225 Difference]: With dead ends: 929 [2021-05-03 17:04:45,633 INFO L226 Difference]: Without dead ends: 929 [2021-05-03 17:04:45,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-05-03 17:04:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-05-03 17:04:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-05-03 17:04:45,646 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-05-03 17:04:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:45,646 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-05-03 17:04:45,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-05-03 17:04:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-05-03 17:04:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:45,647 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:45,647 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:45,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:45,861 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-05-03 17:04:45,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:45,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928192515] [2021-05-03 17:04:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:45,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928192515] [2021-05-03 17:04:45,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448126646] [2021-05-03 17:04:45,964 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 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 [2021-05-03 17:04:45,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:46,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:46,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 17:04:46,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111861450] [2021-05-03 17:04:46,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:04:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:04:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:04:46,038 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:46,346 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-05-03 17:04:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:04:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-05-03 17:04:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:46,350 INFO L225 Difference]: With dead ends: 1555 [2021-05-03 17:04:46,350 INFO L226 Difference]: Without dead ends: 1555 [2021-05-03 17:04:46,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:04:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-05-03 17:04:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-05-03 17:04:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-05-03 17:04:46,380 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-05-03 17:04:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:46,380 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-05-03 17:04:46,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-05-03 17:04:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:46,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:46,382 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:46,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 17:04:46,599 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-05-03 17:04:46,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:46,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304560313] [2021-05-03 17:04:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304560313] [2021-05-03 17:04:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394708701] [2021-05-03 17:04:46,634 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 [2021-05-03 17:04:46,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:04:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:46,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:46,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:04:46,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902753657] [2021-05-03 17:04:46,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:04:46,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:04:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:04:46,734 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:46,979 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-05-03 17:04:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 17:04:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:46,983 INFO L225 Difference]: With dead ends: 1605 [2021-05-03 17:04:46,983 INFO L226 Difference]: Without dead ends: 1605 [2021-05-03 17:04:46,983 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:04:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-05-03 17:04:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-05-03 17:04:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-05-03 17:04:47,021 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-05-03 17:04:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:47,021 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-05-03 17:04:47,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-05-03 17:04:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:47,023 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:47,023 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:47,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:47,237 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-05-03 17:04:47,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:47,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712411007] [2021-05-03 17:04:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:47,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712411007] [2021-05-03 17:04:47,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347546955] [2021-05-03 17:04:47,265 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 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 [2021-05-03 17:04:47,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:47,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:47,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:47,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:47,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:47,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:04:47,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959505046] [2021-05-03 17:04:47,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:04:47,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:04:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:04:47,337 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:47,516 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-05-03 17:04:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:04:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:47,519 INFO L225 Difference]: With dead ends: 1524 [2021-05-03 17:04:47,520 INFO L226 Difference]: Without dead ends: 1520 [2021-05-03 17:04:47,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:04:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-05-03 17:04:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-05-03 17:04:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-05-03 17:04:47,537 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-05-03 17:04:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:47,537 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-05-03 17:04:47,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-05-03 17:04:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:47,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:47,539 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:47,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 17:04:47,753 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-05-03 17:04:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651162487] [2021-05-03 17:04:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:47,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651162487] [2021-05-03 17:04:47,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638488484] [2021-05-03 17:04:47,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:04:47,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:04:47,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:47,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:47,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 17:04:47,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846162736] [2021-05-03 17:04:47,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:04:47,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:47,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:04:47,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:04:47,860 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:48,065 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-05-03 17:04:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:04:48,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-05-03 17:04:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:48,068 INFO L225 Difference]: With dead ends: 1508 [2021-05-03 17:04:48,068 INFO L226 Difference]: Without dead ends: 1496 [2021-05-03 17:04:48,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:04:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-05-03 17:04:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-05-03 17:04:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-05-03 17:04:48,084 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-05-03 17:04:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:48,085 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-05-03 17:04:48,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-05-03 17:04:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:48,086 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:48,086 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:48,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:48,300 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:48,300 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-05-03 17:04:48,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:48,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381826448] [2021-05-03 17:04:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:48,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381826448] [2021-05-03 17:04:48,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950397164] [2021-05-03 17:04:48,386 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 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 [2021-05-03 17:04:48,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:04:48,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:48,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:48,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:48,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945753535] [2021-05-03 17:04:48,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:48,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:48,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:48,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:48,544 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:49,024 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-05-03 17:04:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 17:04:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:49,029 INFO L225 Difference]: With dead ends: 2412 [2021-05-03 17:04:49,029 INFO L226 Difference]: Without dead ends: 2412 [2021-05-03 17:04:49,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:04:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-03 17:04:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-05-03 17:04:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-05-03 17:04:49,053 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-05-03 17:04:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:49,053 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-05-03 17:04:49,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-05-03 17:04:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:49,055 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:49,055 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:49,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 17:04:49,269 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-05-03 17:04:49,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:49,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562376316] [2021-05-03 17:04:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:49,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562376316] [2021-05-03 17:04:49,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733863693] [2021-05-03 17:04:49,306 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 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 [2021-05-03 17:04:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:49,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:49,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:49,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197981680] [2021-05-03 17:04:49,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:49,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:49,441 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:49,997 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-05-03 17:04:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 17:04:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:50,002 INFO L225 Difference]: With dead ends: 2335 [2021-05-03 17:04:50,002 INFO L226 Difference]: Without dead ends: 2335 [2021-05-03 17:04:50,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:04:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-05-03 17:04:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-05-03 17:04:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 17:04:50,027 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 17:04:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:50,027 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 17:04:50,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 17:04:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:50,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:50,029 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:50,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:50,245 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:50,246 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-05-03 17:04:50,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:50,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690805280] [2021-05-03 17:04:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:50,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690805280] [2021-05-03 17:04:50,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519129846] [2021-05-03 17:04:50,287 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 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 [2021-05-03 17:04:50,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:50,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:50,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:04:50,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869170225] [2021-05-03 17:04:50,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:50,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:50,407 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:50,818 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-05-03 17:04:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 17:04:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:50,823 INFO L225 Difference]: With dead ends: 2285 [2021-05-03 17:04:50,823 INFO L226 Difference]: Without dead ends: 2285 [2021-05-03 17:04:50,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:04:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-05-03 17:04:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-05-03 17:04:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 17:04:50,848 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 17:04:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:50,848 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 17:04:50,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 17:04:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:50,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:50,850 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:51,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 17:04:51,065 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-05-03 17:04:51,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:51,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560818404] [2021-05-03 17:04:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:51,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560818404] [2021-05-03 17:04:51,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297768744] [2021-05-03 17:04:51,100 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 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 [2021-05-03 17:04:51,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:04:51,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:51,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:51,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:04:51,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652081498] [2021-05-03 17:04:51,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:51,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:51,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:51,188 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:51,568 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-05-03 17:04:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:04:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:51,572 INFO L225 Difference]: With dead ends: 2176 [2021-05-03 17:04:51,572 INFO L226 Difference]: Without dead ends: 2172 [2021-05-03 17:04:51,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:04:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-05-03 17:04:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-05-03 17:04:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 17:04:51,593 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 17:04:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:51,594 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 17:04:51,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 17:04:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:51,595 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:51,595 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:51,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:51,801 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:51,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-05-03 17:04:51,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:51,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406738159] [2021-05-03 17:04:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:51,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406738159] [2021-05-03 17:04:51,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343172361] [2021-05-03 17:04:51,832 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 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 [2021-05-03 17:04:51,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:51,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:51,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:51,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:51,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:51,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887074762] [2021-05-03 17:04:51,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:51,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:51,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:51,962 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:52,371 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-05-03 17:04:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:04:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:52,374 INFO L225 Difference]: With dead ends: 2199 [2021-05-03 17:04:52,374 INFO L226 Difference]: Without dead ends: 2199 [2021-05-03 17:04:52,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 17:04:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-05-03 17:04:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-05-03 17:04:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 17:04:52,394 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 17:04:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:52,394 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 17:04:52,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 17:04:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:52,396 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:52,396 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:52,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 17:04:52,597 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-05-03 17:04:52,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:52,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145056149] [2021-05-03 17:04:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:52,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145056149] [2021-05-03 17:04:52,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448366587] [2021-05-03 17:04:52,635 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:04:52,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:04:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:52,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:52,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:52,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:52,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300922722] [2021-05-03 17:04:52,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:52,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:52,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:52,729 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:53,089 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-05-03 17:04:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 17:04:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:53,092 INFO L225 Difference]: With dead ends: 2156 [2021-05-03 17:04:53,092 INFO L226 Difference]: Without dead ends: 2152 [2021-05-03 17:04:53,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-05-03 17:04:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-05-03 17:04:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-05-03 17:04:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 17:04:53,113 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 17:04:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:53,113 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 17:04:53,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 17:04:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:53,115 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:53,115 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:53,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 17:04:53,324 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-05-03 17:04:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:53,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512368389] [2021-05-03 17:04:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:53,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512368389] [2021-05-03 17:04:53,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766883283] [2021-05-03 17:04:53,368 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 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 [2021-05-03 17:04:53,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:04:53,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:53,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:53,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:53,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:53,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:53,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863595945] [2021-05-03 17:04:53,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:04:53,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:04:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:04:53,458 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:53,785 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-05-03 17:04:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:04:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:53,789 INFO L225 Difference]: With dead ends: 2097 [2021-05-03 17:04:53,789 INFO L226 Difference]: Without dead ends: 2097 [2021-05-03 17:04:53,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 17:04:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-05-03 17:04:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-05-03 17:04:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-05-03 17:04:53,812 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-05-03 17:04:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:53,812 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-05-03 17:04:53,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-05-03 17:04:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:53,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:53,814 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:54,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 17:04:54,030 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-05-03 17:04:54,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321360075] [2021-05-03 17:04:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:54,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321360075] [2021-05-03 17:04:54,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425701040] [2021-05-03 17:04:54,063 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 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 [2021-05-03 17:04:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:54,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:54,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:54,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:54,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:54,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748917926] [2021-05-03 17:04:54,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:04:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:04:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:04:54,146 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:54,429 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-05-03 17:04:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:04:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:54,433 INFO L225 Difference]: With dead ends: 1963 [2021-05-03 17:04:54,433 INFO L226 Difference]: Without dead ends: 1959 [2021-05-03 17:04:54,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:04:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-05-03 17:04:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-05-03 17:04:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-05-03 17:04:54,452 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-05-03 17:04:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:54,452 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-05-03 17:04:54,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-05-03 17:04:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:54,454 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:54,454 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:54,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 17:04:54,655 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-05-03 17:04:54,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:54,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829680052] [2021-05-03 17:04:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:54,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829680052] [2021-05-03 17:04:54,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088600853] [2021-05-03 17:04:54,689 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:04:54,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:54,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:54,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:54,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:54,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:04:54,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750301676] [2021-05-03 17:04:54,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:04:54,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:54,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:04:54,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:04:54,778 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:55,001 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-05-03 17:04:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:04:55,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:55,005 INFO L225 Difference]: With dead ends: 1728 [2021-05-03 17:04:55,005 INFO L226 Difference]: Without dead ends: 1716 [2021-05-03 17:04:55,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:04:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-05-03 17:04:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-05-03 17:04:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-05-03 17:04:55,023 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-05-03 17:04:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:55,023 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-05-03 17:04:55,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-05-03 17:04:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:55,025 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:55,025 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:55,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:55,237 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:55,238 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-05-03 17:04:55,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:55,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310731540] [2021-05-03 17:04:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310731540] [2021-05-03 17:04:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209625371] [2021-05-03 17:04:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:55,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:04:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:55,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:55,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:55,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696508643] [2021-05-03 17:04:55,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:55,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:55,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:55,382 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:55,719 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-05-03 17:04:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:04:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:55,723 INFO L225 Difference]: With dead ends: 1821 [2021-05-03 17:04:55,723 INFO L226 Difference]: Without dead ends: 1821 [2021-05-03 17:04:55,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-05-03 17:04:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-03 17:04:55,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-05-03 17:04:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-05-03 17:04:55,742 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-05-03 17:04:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:55,742 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-05-03 17:04:55,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-05-03 17:04:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:55,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:55,744 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:55,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-03 17:04:55,960 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-05-03 17:04:55,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:55,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532738302] [2021-05-03 17:04:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:55,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532738302] [2021-05-03 17:04:55,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819899854] [2021-05-03 17:04:55,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:56,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:56,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:56,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:56,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:56,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:04:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066169980] [2021-05-03 17:04:56,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:04:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:04:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:04:56,081 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:56,407 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-05-03 17:04:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:04:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:56,410 INFO L225 Difference]: With dead ends: 1790 [2021-05-03 17:04:56,410 INFO L226 Difference]: Without dead ends: 1786 [2021-05-03 17:04:56,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:04:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-05-03 17:04:56,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-05-03 17:04:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-05-03 17:04:56,427 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-05-03 17:04:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:56,428 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-05-03 17:04:56,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-05-03 17:04:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 17:04:56,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:56,430 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:56,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 17:04:56,633 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-05-03 17:04:56,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:56,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038842584] [2021-05-03 17:04:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:56,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038842584] [2021-05-03 17:04:56,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606177087] [2021-05-03 17:04:56,666 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 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 [2021-05-03 17:04:56,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:04:56,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:04:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:56,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:56,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:04:56,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091199666] [2021-05-03 17:04:56,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:04:56,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:04:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:04:56,750 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:56,912 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-05-03 17:04:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:04:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 17:04:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:56,921 INFO L225 Difference]: With dead ends: 1649 [2021-05-03 17:04:56,921 INFO L226 Difference]: Without dead ends: 1637 [2021-05-03 17:04:56,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:04:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-05-03 17:04:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-05-03 17:04:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-05-03 17:04:56,941 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-05-03 17:04:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:56,941 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-05-03 17:04:56,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-05-03 17:04:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:04:56,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:56,943 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:57,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:57,157 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-05-03 17:04:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:57,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190964686] [2021-05-03 17:04:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:57,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190964686] [2021-05-03 17:04:57,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742647323] [2021-05-03 17:04:57,408 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:04:57,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:57,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:57,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:04:57,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:57,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:57,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:04:57,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:57,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:57,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:57,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:04:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:57,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:57,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 17:04:57,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722235136] [2021-05-03 17:04:57,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:04:57,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:57,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:04:57,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:04:57,688 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:58,203 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-05-03 17:04:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:04:58,204 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:04:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:58,206 INFO L225 Difference]: With dead ends: 1517 [2021-05-03 17:04:58,206 INFO L226 Difference]: Without dead ends: 1502 [2021-05-03 17:04:58,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:04:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-05-03 17:04:58,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-05-03 17:04:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-05-03 17:04:58,226 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-05-03 17:04:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:58,226 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-05-03 17:04:58,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-05-03 17:04:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:04:58,228 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:58,228 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:58,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 17:04:58,441 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-05-03 17:04:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:58,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137495160] [2021-05-03 17:04:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:58,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137495160] [2021-05-03 17:04:58,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637144757] [2021-05-03 17:04:58,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:58,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:04:58,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:58,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:04:58,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:58,921 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-05-03 17:04:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-05-03 17:04:58,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:58,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:58,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:58,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-05-03 17:04:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:58,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:58,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:04:58,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281634060] [2021-05-03 17:04:58,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:04:58,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:58,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:04:58,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:04:58,962 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:59,904 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-05-03 17:04:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:04:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:04:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:59,907 INFO L225 Difference]: With dead ends: 1495 [2021-05-03 17:04:59,907 INFO L226 Difference]: Without dead ends: 1480 [2021-05-03 17:04:59,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 876.7ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-05-03 17:04:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-05-03 17:04:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-05-03 17:04:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-05-03 17:04:59,922 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-05-03 17:04:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:59,922 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-05-03 17:04:59,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-05-03 17:04:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:04:59,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:59,924 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:00,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:00,127 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-05-03 17:05:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:00,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177886993] [2021-05-03 17:05:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:00,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177886993] [2021-05-03 17:05:00,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561763707] [2021-05-03 17:05:00,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:00,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:05:00,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:00,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:05:00,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:00,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:00,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:00,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:00,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:05:00,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:00,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:00,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:00,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:05:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:00,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:00,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 17:05:00,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083191994] [2021-05-03 17:05:00,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:00,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:00,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:00,768 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:01,763 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-03 17:05:01,983 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-05-03 17:05:02,504 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-05-03 17:05:02,769 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-05-03 17:05:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:03,068 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-05-03 17:05:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:05:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:03,071 INFO L225 Difference]: With dead ends: 1658 [2021-05-03 17:05:03,071 INFO L226 Difference]: Without dead ends: 1643 [2021-05-03 17:05:03,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2296.5ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:05:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-05-03 17:05:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-05-03 17:05:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-05-03 17:05:03,094 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-05-03 17:05:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:03,094 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-05-03 17:05:03,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-05-03 17:05:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:03,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:03,096 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:03,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-03 17:05:03,297 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-05-03 17:05:03,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:03,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694327584] [2021-05-03 17:05:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:03,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694327584] [2021-05-03 17:05:03,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214794188] [2021-05-03 17:05:03,621 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) [2021-05-03 17:05:03,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:05:03,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:03,834 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-05-03 17:05:03,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-05-03 17:05:03,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:03,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:03,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:03,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-05-03 17:05:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:03,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:03,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:05:03,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194542014] [2021-05-03 17:05:03,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:03,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:03,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:03,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:03,896 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:05,762 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-05-03 17:05:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:05:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:05,765 INFO L225 Difference]: With dead ends: 1843 [2021-05-03 17:05:05,766 INFO L226 Difference]: Without dead ends: 1828 [2021-05-03 17:05:05,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1498.5ms TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:05:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-05-03 17:05:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-05-03 17:05:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-05-03 17:05:05,794 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-05-03 17:05:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:05,795 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-05-03 17:05:05,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-05-03 17:05:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:05,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:05,797 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:06,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:06,007 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-05-03 17:05:06,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:06,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947764873] [2021-05-03 17:05:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:06,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947764873] [2021-05-03 17:05:06,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537753179] [2021-05-03 17:05:06,374 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 [2021-05-03 17:05:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:06,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:06,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:05:06,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:06,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:06,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:06,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:05:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:06,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:06,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 17:05:06,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410698648] [2021-05-03 17:05:06,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:05:06,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:05:06,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:05:06,661 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:08,306 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-05-03 17:05:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:09,168 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-05-03 17:05:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 17:05:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:09,172 INFO L225 Difference]: With dead ends: 1877 [2021-05-03 17:05:09,172 INFO L226 Difference]: Without dead ends: 1862 [2021-05-03 17:05:09,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2285.6ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:05:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-05-03 17:05:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-05-03 17:05:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-05-03 17:05:09,193 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-05-03 17:05:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:09,193 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-05-03 17:05:09,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-05-03 17:05:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:09,195 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:09,196 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:09,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 17:05:09,403 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-05-03 17:05:09,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:09,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931090605] [2021-05-03 17:05:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:09,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931090605] [2021-05-03 17:05:09,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916405492] [2021-05-03 17:05:09,692 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 [2021-05-03 17:05:09,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:05:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:09,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:09,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:09,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-05-03 17:05:09,972 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:05:09,998 INFO L628 ElimStorePlain]: treesize reduction 19, result has 57.8 percent of original size [2021-05-03 17:05:10,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:10,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-05-03 17:05:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:10,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:10,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 17:05:10,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973896062] [2021-05-03 17:05:10,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:05:10,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:05:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:05:10,088 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:12,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:12,063 INFO L93 Difference]: Finished difference Result 2109 states and 6703 transitions. [2021-05-03 17:05:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:05:12,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:12,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:12,068 INFO L225 Difference]: With dead ends: 2109 [2021-05-03 17:05:12,068 INFO L226 Difference]: Without dead ends: 2094 [2021-05-03 17:05:12,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1691.2ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 17:05:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-05-03 17:05:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1219. [2021-05-03 17:05:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-05-03 17:05:12,088 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-05-03 17:05:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:12,088 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-05-03 17:05:12,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-05-03 17:05:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:12,090 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:12,090 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:12,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-03 17:05:12,291 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:12,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-05-03 17:05:12,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:12,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330791880] [2021-05-03 17:05:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330791880] [2021-05-03 17:05:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932342168] [2021-05-03 17:05:12,547 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 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 [2021-05-03 17:05:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:12,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:12,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:12,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:05:12,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:12,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:12,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:12,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:05:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:12,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:12,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 17:05:12,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42959030] [2021-05-03 17:05:12,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:05:12,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:05:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:05:12,831 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:13,642 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-05-03 17:05:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:05:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:13,658 INFO L225 Difference]: With dead ends: 1622 [2021-05-03 17:05:13,659 INFO L226 Difference]: Without dead ends: 1607 [2021-05-03 17:05:13,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:05:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-05-03 17:05:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-05-03 17:05:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-05-03 17:05:13,692 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-05-03 17:05:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:13,692 INFO L480 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-05-03 17:05:13,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-05-03 17:05:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:13,694 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:13,694 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:13,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 17:05:13,910 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-05-03 17:05:13,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:13,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159026862] [2021-05-03 17:05:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159026862] [2021-05-03 17:05:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406421951] [2021-05-03 17:05:14,225 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 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 [2021-05-03 17:05:14,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:05:14,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:05:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:14,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:14,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-05-03 17:05:14,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:14,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:14,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:14,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-05-03 17:05:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:14,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:14,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:05:14,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256497456] [2021-05-03 17:05:14,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:14,616 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:16,655 INFO L93 Difference]: Finished difference Result 1847 states and 5891 transitions. [2021-05-03 17:05:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:05:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:16,659 INFO L225 Difference]: With dead ends: 1847 [2021-05-03 17:05:16,659 INFO L226 Difference]: Without dead ends: 1832 [2021-05-03 17:05:16,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1660.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 17:05:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-05-03 17:05:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1241. [2021-05-03 17:05:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-05-03 17:05:16,680 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-05-03 17:05:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:16,680 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-05-03 17:05:16,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-05-03 17:05:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:16,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:16,682 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:16,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 17:05:16,883 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-05-03 17:05:16,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:16,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628495809] [2021-05-03 17:05:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:17,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628495809] [2021-05-03 17:05:17,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143286114] [2021-05-03 17:05:17,080 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 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 [2021-05-03 17:05:17,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:05:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:17,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:17,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:05:17,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:17,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:17,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:17,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:05:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:17,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:17,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 17:05:17,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954768395] [2021-05-03 17:05:17,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:05:17,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:05:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:05:17,350 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:18,303 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-05-03 17:05:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:05:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:18,307 INFO L225 Difference]: With dead ends: 1876 [2021-05-03 17:05:18,308 INFO L226 Difference]: Without dead ends: 1861 [2021-05-03 17:05:18,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-05-03 17:05:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-05-03 17:05:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-05-03 17:05:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-05-03 17:05:18,330 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-05-03 17:05:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:18,330 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-05-03 17:05:18,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-05-03 17:05:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:18,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:18,341 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:18,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:18,549 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-05-03 17:05:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:18,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258227199] [2021-05-03 17:05:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:18,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258227199] [2021-05-03 17:05:18,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87171201] [2021-05-03 17:05:18,761 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 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 [2021-05-03 17:05:18,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:05:18,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:05:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:18,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:05:18,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:18,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:18,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:18,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:05:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:18,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:18,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:05:18,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345215145] [2021-05-03 17:05:18,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:05:18,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:05:18,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:05:18,977 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:19,394 INFO L93 Difference]: Finished difference Result 1393 states and 4580 transitions. [2021-05-03 17:05:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:05:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:19,397 INFO L225 Difference]: With dead ends: 1393 [2021-05-03 17:05:19,398 INFO L226 Difference]: Without dead ends: 1378 [2021-05-03 17:05:19,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:05:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-05-03 17:05:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1246. [2021-05-03 17:05:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-05-03 17:05:19,416 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-05-03 17:05:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:19,416 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-05-03 17:05:19,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-05-03 17:05:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:19,419 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:19,419 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:19,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:19,620 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:19,620 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-05-03 17:05:19,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:19,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521843276] [2021-05-03 17:05:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:19,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521843276] [2021-05-03 17:05:19,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828583976] [2021-05-03 17:05:19,893 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 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 [2021-05-03 17:05:19,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:05:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:05:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:20,172 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-05-03 17:05:20,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 59 [2021-05-03 17:05:20,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:20,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:20,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:20,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:21 [2021-05-03 17:05:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:20,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:20,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:05:20,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116880798] [2021-05-03 17:05:20,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:20,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:20,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:20,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:20,249 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:21,990 INFO L93 Difference]: Finished difference Result 2076 states and 6735 transitions. [2021-05-03 17:05:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:05:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:21,995 INFO L225 Difference]: With dead ends: 2076 [2021-05-03 17:05:21,995 INFO L226 Difference]: Without dead ends: 2061 [2021-05-03 17:05:21,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1415.7ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:05:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-05-03 17:05:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1246. [2021-05-03 17:05:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-05-03 17:05:22,018 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-05-03 17:05:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:22,018 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-05-03 17:05:22,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-05-03 17:05:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:22,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:22,020 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:22,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 17:05:22,223 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-05-03 17:05:22,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:22,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158787224] [2021-05-03 17:05:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:22,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158787224] [2021-05-03 17:05:22,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117505280] [2021-05-03 17:05:22,458 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 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 [2021-05-03 17:05:22,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:05:22,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:22,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:05:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:22,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:22,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:22,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:05:22,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:05:22,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:22,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:22,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-05-03 17:05:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:22,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:22,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:05:22,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677372489] [2021-05-03 17:05:22,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:22,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:22,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:22,711 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:24,512 INFO L93 Difference]: Finished difference Result 1890 states and 6145 transitions. [2021-05-03 17:05:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:05:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:24,515 INFO L225 Difference]: With dead ends: 1890 [2021-05-03 17:05:24,516 INFO L226 Difference]: Without dead ends: 1875 [2021-05-03 17:05:24,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1475.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:05:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-05-03 17:05:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1246. [2021-05-03 17:05:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-05-03 17:05:24,538 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-05-03 17:05:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:24,538 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-05-03 17:05:24,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-05-03 17:05:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:24,540 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:24,540 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:24,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 17:05:24,741 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-05-03 17:05:24,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:24,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952353257] [2021-05-03 17:05:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:25,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952353257] [2021-05-03 17:05:25,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697061053] [2021-05-03 17:05:25,016 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 [2021-05-03 17:05:25,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:05:25,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:25,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:25,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:25,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:25,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:05:25,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:25,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:25,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:25,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:05:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:25,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:25,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:05:25,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634092254] [2021-05-03 17:05:25,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:25,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:25,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:25,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:25,243 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:26,614 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-05-03 17:05:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:27,804 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-05-03 17:05:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 17:05:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:27,810 INFO L225 Difference]: With dead ends: 2938 [2021-05-03 17:05:27,810 INFO L226 Difference]: Without dead ends: 2893 [2021-05-03 17:05:27,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2193.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 17:05:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-05-03 17:05:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-05-03 17:05:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-05-03 17:05:27,845 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-05-03 17:05:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:27,845 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-05-03 17:05:27,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-05-03 17:05:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:27,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:27,847 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:28,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:28,048 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:28,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-05-03 17:05:28,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:28,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808579866] [2021-05-03 17:05:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:28,223 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 17:05:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:28,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808579866] [2021-05-03 17:05:28,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509066307] [2021-05-03 17:05:28,411 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 [2021-05-03 17:05:28,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:05:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:05:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:28,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:28,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:28,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:05:28,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:28,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:28,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:28,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:05:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:28,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:28,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:05:28,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135219332] [2021-05-03 17:05:28,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:28,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:28,652 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:28,793 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 17:05:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:30,879 INFO L93 Difference]: Finished difference Result 2772 states and 8760 transitions. [2021-05-03 17:05:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 17:05:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:30,884 INFO L225 Difference]: With dead ends: 2772 [2021-05-03 17:05:30,884 INFO L226 Difference]: Without dead ends: 2727 [2021-05-03 17:05:30,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2042.4ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 17:05:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-05-03 17:05:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 1288. [2021-05-03 17:05:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-05-03 17:05:30,907 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-05-03 17:05:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:30,907 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-05-03 17:05:30,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-05-03 17:05:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:30,909 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:30,909 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:31,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:31,113 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-05-03 17:05:31,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:31,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683630283] [2021-05-03 17:05:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:31,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683630283] [2021-05-03 17:05:31,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527676564] [2021-05-03 17:05:31,450 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 [2021-05-03 17:05:31,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:05:31,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-05-03 17:05:31,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:05:31,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:31,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:31,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-05-03 17:05:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:31,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:31,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:05:31,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472668514] [2021-05-03 17:05:31,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:31,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:31,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:31,719 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:34,948 INFO L93 Difference]: Finished difference Result 3091 states and 9690 transitions. [2021-05-03 17:05:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 17:05:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:34,954 INFO L225 Difference]: With dead ends: 3091 [2021-05-03 17:05:34,954 INFO L226 Difference]: Without dead ends: 3046 [2021-05-03 17:05:34,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2694.5ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 17:05:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-05-03 17:05:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1292. [2021-05-03 17:05:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-05-03 17:05:34,983 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-05-03 17:05:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:34,984 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-05-03 17:05:34,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-05-03 17:05:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:34,986 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:34,986 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:35,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-03 17:05:35,188 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-05-03 17:05:35,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:35,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212107588] [2021-05-03 17:05:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:35,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212107588] [2021-05-03 17:05:35,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558498925] [2021-05-03 17:05:35,457 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 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 [2021-05-03 17:05:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:35,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:35,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:35,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:35,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:35,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:05:35,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:35,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:35,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:35,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:05:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:35,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:35,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 17:05:35,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518337203] [2021-05-03 17:05:35,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:05:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:05:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:05:35,830 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:36,497 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-05-03 17:05:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:05:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:36,500 INFO L225 Difference]: With dead ends: 1654 [2021-05-03 17:05:36,500 INFO L226 Difference]: Without dead ends: 1639 [2021-05-03 17:05:36,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:05:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-05-03 17:05:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-05-03 17:05:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-05-03 17:05:36,517 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-05-03 17:05:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:36,518 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-05-03 17:05:36,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-05-03 17:05:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:36,520 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:36,520 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:36,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 17:05:36,720 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-05-03 17:05:36,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:36,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131999545] [2021-05-03 17:05:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:37,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131999545] [2021-05-03 17:05:37,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647327649] [2021-05-03 17:05:37,005 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:05:37,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:05:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:37,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 17:05:37,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:37,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 17:05:37,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:37,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:37,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:37,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:91 [2021-05-03 17:05:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:37,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:37,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:05:37,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698891325] [2021-05-03 17:05:37,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:37,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:37,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:37,466 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:39,471 INFO L93 Difference]: Finished difference Result 1924 states and 6179 transitions. [2021-05-03 17:05:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:05:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:39,475 INFO L225 Difference]: With dead ends: 1924 [2021-05-03 17:05:39,475 INFO L226 Difference]: Without dead ends: 1894 [2021-05-03 17:05:39,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1738.1ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:05:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-05-03 17:05:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1297. [2021-05-03 17:05:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-05-03 17:05:39,499 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-05-03 17:05:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:39,499 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-05-03 17:05:39,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-05-03 17:05:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:39,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:39,501 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:39,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:39,702 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 15 times [2021-05-03 17:05:39,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:39,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259920991] [2021-05-03 17:05:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:40,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259920991] [2021-05-03 17:05:40,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753729824] [2021-05-03 17:05:40,073 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 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 [2021-05-03 17:05:40,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:05:40,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 17:05:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:40,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:40,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 17:05:40,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:40,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:40,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:40,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-05-03 17:05:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:40,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:40,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-05-03 17:05:40,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372234194] [2021-05-03 17:05:40,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:40,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:40,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:40,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:40,444 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:42,243 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-05-03 17:05:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:05:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:42,247 INFO L225 Difference]: With dead ends: 2000 [2021-05-03 17:05:42,247 INFO L226 Difference]: Without dead ends: 1985 [2021-05-03 17:05:42,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1477.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:05:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-05-03 17:05:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1306. [2021-05-03 17:05:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-05-03 17:05:42,272 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-05-03 17:05:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:42,272 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-05-03 17:05:42,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-05-03 17:05:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:42,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:42,274 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:42,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:42,481 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 16 times [2021-05-03 17:05:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:42,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55880280] [2021-05-03 17:05:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55880280] [2021-05-03 17:05:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067937487] [2021-05-03 17:05:42,780 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 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 [2021-05-03 17:05:42,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:05:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:05:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:42,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:42,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:42,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:05:42,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:42,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:42,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:42,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:05:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:43,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:43,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:05:43,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688541459] [2021-05-03 17:05:43,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:05:43,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:43,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:05:43,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:05:43,004 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:43,332 INFO L93 Difference]: Finished difference Result 1441 states and 4791 transitions. [2021-05-03 17:05:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:05:43,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:43,335 INFO L225 Difference]: With dead ends: 1441 [2021-05-03 17:05:43,335 INFO L226 Difference]: Without dead ends: 1426 [2021-05-03 17:05:43,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:05:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-05-03 17:05:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1309. [2021-05-03 17:05:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3929663608562692) internal successors, (4438), 1308 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4438 transitions. [2021-05-03 17:05:43,353 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4438 transitions. Word has length 26 [2021-05-03 17:05:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:43,353 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4438 transitions. [2021-05-03 17:05:43,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4438 transitions. [2021-05-03 17:05:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:43,355 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:43,355 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:43,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:43,568 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 17 times [2021-05-03 17:05:43,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:43,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537642089] [2021-05-03 17:05:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:43,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537642089] [2021-05-03 17:05:43,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908436953] [2021-05-03 17:05:43,849 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 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 [2021-05-03 17:05:43,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:05:43,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:43,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 17:05:43,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:44,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:44,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:05:44,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:05:44,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:44,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:44,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-05-03 17:05:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:44,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:44,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:05:44,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6951541] [2021-05-03 17:05:44,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:44,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:44,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:44,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:44,136 INFO L87 Difference]: Start difference. First operand 1309 states and 4438 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:45,883 INFO L93 Difference]: Finished difference Result 2201 states and 7163 transitions. [2021-05-03 17:05:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:05:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:45,887 INFO L225 Difference]: With dead ends: 2201 [2021-05-03 17:05:45,887 INFO L226 Difference]: Without dead ends: 2171 [2021-05-03 17:05:45,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1500.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:05:45,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-05-03 17:05:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1306. [2021-05-03 17:05:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-05-03 17:05:45,906 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-05-03 17:05:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:45,906 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-05-03 17:05:45,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-05-03 17:05:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:45,908 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:45,908 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:46,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-05-03 17:05:46,110 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 18 times [2021-05-03 17:05:46,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:46,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412214272] [2021-05-03 17:05:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:46,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412214272] [2021-05-03 17:05:46,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595619644] [2021-05-03 17:05:46,410 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 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 [2021-05-03 17:05:46,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:05:46,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:46,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:46,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:46,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:46,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:05:46,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:05:46,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:46,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:46,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-05-03 17:05:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:46,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:46,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:05:46,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206405797] [2021-05-03 17:05:46,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:46,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:46,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:46,708 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:48,212 INFO L93 Difference]: Finished difference Result 1909 states and 6282 transitions. [2021-05-03 17:05:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 17:05:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:48,217 INFO L225 Difference]: With dead ends: 1909 [2021-05-03 17:05:48,217 INFO L226 Difference]: Without dead ends: 1894 [2021-05-03 17:05:48,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1308.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 17:05:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-05-03 17:05:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1303. [2021-05-03 17:05:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.387864823348694) internal successors, (4411), 1302 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4411 transitions. [2021-05-03 17:05:48,264 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4411 transitions. Word has length 26 [2021-05-03 17:05:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:48,265 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4411 transitions. [2021-05-03 17:05:48,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4411 transitions. [2021-05-03 17:05:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:48,267 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:48,267 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:48,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:48,468 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-05-03 17:05:48,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:48,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396527560] [2021-05-03 17:05:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:48,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396527560] [2021-05-03 17:05:48,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088672032] [2021-05-03 17:05:48,821 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 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 [2021-05-03 17:05:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:49,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:49,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:05:49,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:49,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:49,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:49,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:05:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 17:05:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636771074] [2021-05-03 17:05:49,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:05:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:05:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:05:49,113 INFO L87 Difference]: Start difference. First operand 1303 states and 4411 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:49,853 INFO L93 Difference]: Finished difference Result 1736 states and 5716 transitions. [2021-05-03 17:05:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:05:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:49,857 INFO L225 Difference]: With dead ends: 1736 [2021-05-03 17:05:49,857 INFO L226 Difference]: Without dead ends: 1715 [2021-05-03 17:05:49,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 802.8ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:05:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-05-03 17:05:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-05-03 17:05:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3827252419955323) internal successors, (4543), 1343 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4543 transitions. [2021-05-03 17:05:49,879 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4543 transitions. Word has length 26 [2021-05-03 17:05:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:49,879 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 4543 transitions. [2021-05-03 17:05:49,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4543 transitions. [2021-05-03 17:05:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:49,882 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:49,882 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:50,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-03 17:05:50,086 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-05-03 17:05:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:50,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984277533] [2021-05-03 17:05:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:50,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984277533] [2021-05-03 17:05:50,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265132173] [2021-05-03 17:05:50,424 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 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 [2021-05-03 17:05:50,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:05:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 17:05:50,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:50,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 17:05:50,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:50,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:50,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:50,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:89 [2021-05-03 17:05:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:50,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:50,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-05-03 17:05:50,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067065815] [2021-05-03 17:05:50,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:50,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:50,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:50,858 INFO L87 Difference]: Start difference. First operand 1344 states and 4543 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:51,812 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 17:05:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:52,529 INFO L93 Difference]: Finished difference Result 1754 states and 5590 transitions. [2021-05-03 17:05:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:05:52,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:52,533 INFO L225 Difference]: With dead ends: 1754 [2021-05-03 17:05:52,533 INFO L226 Difference]: Without dead ends: 1729 [2021-05-03 17:05:52,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1565.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:05:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-05-03 17:05:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1358. [2021-05-03 17:05:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3920412675018423) internal successors, (4603), 1357 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4603 transitions. [2021-05-03 17:05:52,552 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4603 transitions. Word has length 26 [2021-05-03 17:05:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:52,553 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 4603 transitions. [2021-05-03 17:05:52,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4603 transitions. [2021-05-03 17:05:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:52,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:52,555 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:52,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:52,757 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-05-03 17:05:52,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:52,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722082082] [2021-05-03 17:05:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:53,006 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 17:05:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:53,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722082082] [2021-05-03 17:05:53,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678140767] [2021-05-03 17:05:53,279 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 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 [2021-05-03 17:05:53,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:05:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:53,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:05:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:53,600 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-05-03 17:05:53,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-05-03 17:05:53,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:53,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:53,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:53,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-05-03 17:05:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:53,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:53,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 17:05:53,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074512531] [2021-05-03 17:05:53,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:53,690 INFO L87 Difference]: Start difference. First operand 1358 states and 4603 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:54,811 INFO L93 Difference]: Finished difference Result 1743 states and 5751 transitions. [2021-05-03 17:05:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:05:54,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:54,816 INFO L225 Difference]: With dead ends: 1743 [2021-05-03 17:05:54,816 INFO L226 Difference]: Without dead ends: 1714 [2021-05-03 17:05:54,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1290.9ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-05-03 17:05:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-05-03 17:05:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1361. [2021-05-03 17:05:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3926470588235293) internal successors, (4614), 1360 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4614 transitions. [2021-05-03 17:05:54,839 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4614 transitions. Word has length 26 [2021-05-03 17:05:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:54,839 INFO L480 AbstractCegarLoop]: Abstraction has 1361 states and 4614 transitions. [2021-05-03 17:05:54,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4614 transitions. [2021-05-03 17:05:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:54,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:54,842 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:55,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 17:05:55,059 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-05-03 17:05:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:55,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408609967] [2021-05-03 17:05:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:55,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408609967] [2021-05-03 17:05:55,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976285201] [2021-05-03 17:05:55,401 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 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 [2021-05-03 17:05:55,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:05:55,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:05:55,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:55,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:55,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:05:55,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:05:55,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:55,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:55,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:55,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:05:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:55,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:55,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:05:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529657973] [2021-05-03 17:05:55,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:05:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:05:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:05:55,636 INFO L87 Difference]: Start difference. First operand 1361 states and 4614 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:55,993 INFO L93 Difference]: Finished difference Result 1474 states and 4920 transitions. [2021-05-03 17:05:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:05:55,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:55,996 INFO L225 Difference]: With dead ends: 1474 [2021-05-03 17:05:55,996 INFO L226 Difference]: Without dead ends: 1459 [2021-05-03 17:05:55,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:05:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-05-03 17:05:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1367. [2021-05-03 17:05:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.394582723279649) internal successors, (4637), 1366 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4637 transitions. [2021-05-03 17:05:56,016 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4637 transitions. Word has length 26 [2021-05-03 17:05:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:56,016 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4637 transitions. [2021-05-03 17:05:56,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4637 transitions. [2021-05-03 17:05:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:56,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:56,019 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:56,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:56,221 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-05-03 17:05:56,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:56,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303107186] [2021-05-03 17:05:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:56,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303107186] [2021-05-03 17:05:56,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232999471] [2021-05-03 17:05:56,581 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 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 [2021-05-03 17:05:56,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:05:56,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:56,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:05:56,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:56,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:56,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:56,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:05:56,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:05:56,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:56,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:56,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-05-03 17:05:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:56,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:56,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:05:56,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977940358] [2021-05-03 17:05:56,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:56,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:56,955 INFO L87 Difference]: Start difference. First operand 1367 states and 4637 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:57,774 INFO L93 Difference]: Finished difference Result 1826 states and 6031 transitions. [2021-05-03 17:05:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:05:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:57,778 INFO L225 Difference]: With dead ends: 1826 [2021-05-03 17:05:57,778 INFO L226 Difference]: Without dead ends: 1801 [2021-05-03 17:05:57,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 905.7ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:05:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-05-03 17:05:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1374. [2021-05-03 17:05:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.3991260014566644) internal successors, (4667), 1373 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4667 transitions. [2021-05-03 17:05:57,801 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4667 transitions. Word has length 26 [2021-05-03 17:05:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:57,801 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4667 transitions. [2021-05-03 17:05:57,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4667 transitions. [2021-05-03 17:05:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:57,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:57,803 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:58,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 17:05:58,005 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-05-03 17:05:58,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:58,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342795391] [2021-05-03 17:05:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:58,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342795391] [2021-05-03 17:05:58,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345026972] [2021-05-03 17:05:58,327 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 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 [2021-05-03 17:05:58,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:05:58,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:05:58,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:58,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:58,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:58,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:58,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 17:05:58,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:05:58,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:58,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:05:58,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-05-03 17:05:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:58,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:58,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:05:58,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886787825] [2021-05-03 17:05:58,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:58,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:58,598 INFO L87 Difference]: Start difference. First operand 1374 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:59,715 INFO L93 Difference]: Finished difference Result 1851 states and 6138 transitions. [2021-05-03 17:05:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:05:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:05:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:59,720 INFO L225 Difference]: With dead ends: 1851 [2021-05-03 17:05:59,720 INFO L226 Difference]: Without dead ends: 1832 [2021-05-03 17:05:59,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1026.2ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:05:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-05-03 17:05:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1386. [2021-05-03 17:05:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-05-03 17:05:59,768 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-05-03 17:05:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:59,768 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-05-03 17:05:59,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-05-03 17:05:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:05:59,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:59,770 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:59,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-05-03 17:05:59,971 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-05-03 17:05:59,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:59,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058000017] [2021-05-03 17:05:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:00,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058000017] [2021-05-03 17:06:00,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902057251] [2021-05-03 17:06:00,207 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 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 [2021-05-03 17:06:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:00,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:00,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:00,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:00,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:06:00,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:06:00,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:00,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:00,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-05-03 17:06:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:00,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:00,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 17:06:00,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060965514] [2021-05-03 17:06:00,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:06:00,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:06:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:06:00,470 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:01,127 INFO L93 Difference]: Finished difference Result 1888 states and 6257 transitions. [2021-05-03 17:06:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:06:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:01,131 INFO L225 Difference]: With dead ends: 1888 [2021-05-03 17:06:01,132 INFO L226 Difference]: Without dead ends: 1863 [2021-05-03 17:06:01,132 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 615.0ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:06:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-05-03 17:06:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1386. [2021-05-03 17:06:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-05-03 17:06:01,157 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-05-03 17:06:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:01,157 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-05-03 17:06:01,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-05-03 17:06:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:01,159 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:01,159 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:01,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 17:06:01,360 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-05-03 17:06:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:01,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696186300] [2021-05-03 17:06:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:01,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696186300] [2021-05-03 17:06:01,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96825586] [2021-05-03 17:06:01,747 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 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 [2021-05-03 17:06:01,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:06:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:06:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:01,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:01,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:01,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:06:01,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:01,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:02,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:02,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:06:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:02,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:02,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 17:06:02,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220108328] [2021-05-03 17:06:02,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:02,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:02,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:02,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:02,027 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:03,611 INFO L93 Difference]: Finished difference Result 1823 states and 6011 transitions. [2021-05-03 17:06:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:06:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:03,615 INFO L225 Difference]: With dead ends: 1823 [2021-05-03 17:06:03,615 INFO L226 Difference]: Without dead ends: 1797 [2021-05-03 17:06:03,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1645.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:06:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-05-03 17:06:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1398. [2021-05-03 17:06:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-05-03 17:06:03,639 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-05-03 17:06:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:03,639 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-05-03 17:06:03,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-05-03 17:06:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:03,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:03,641 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:03,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:03,857 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:03,857 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-05-03 17:06:03,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:03,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201417706] [2021-05-03 17:06:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:04,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201417706] [2021-05-03 17:06:04,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744354760] [2021-05-03 17:06:04,242 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 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 [2021-05-03 17:06:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:04,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:04,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:04,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:04,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:06:04,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:04,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:04,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:04,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:06:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:04,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:04,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 17:06:04,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70646268] [2021-05-03 17:06:04,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:06:04,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:06:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:06:04,478 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:06,090 INFO L93 Difference]: Finished difference Result 1968 states and 6512 transitions. [2021-05-03 17:06:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 17:06:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:06,094 INFO L225 Difference]: With dead ends: 1968 [2021-05-03 17:06:06,094 INFO L226 Difference]: Without dead ends: 1953 [2021-05-03 17:06:06,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1491.0ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 17:06:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-05-03 17:06:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-05-03 17:06:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-05-03 17:06:06,116 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-05-03 17:06:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:06,116 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-05-03 17:06:06,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-05-03 17:06:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:06,118 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:06,119 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:06,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 17:06:06,333 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-05-03 17:06:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:06,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310035289] [2021-05-03 17:06:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:06,569 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 17:06:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310035289] [2021-05-03 17:06:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943578137] [2021-05-03 17:06:06,727 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 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 [2021-05-03 17:06:06,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:06:06,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:06,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:06,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:06,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:06:06,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:06:06,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:06,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:06,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-05-03 17:06:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:07,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:07,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:06:07,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442638759] [2021-05-03 17:06:07,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:07,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:07,004 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:08,649 INFO L93 Difference]: Finished difference Result 2014 states and 6565 transitions. [2021-05-03 17:06:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:06:08,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:08,654 INFO L225 Difference]: With dead ends: 2014 [2021-05-03 17:06:08,654 INFO L226 Difference]: Without dead ends: 1995 [2021-05-03 17:06:08,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1423.9ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:06:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-05-03 17:06:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1407. [2021-05-03 17:06:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.3975817923186344) internal successors, (4777), 1406 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4777 transitions. [2021-05-03 17:06:08,676 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4777 transitions. Word has length 26 [2021-05-03 17:06:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:08,676 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4777 transitions. [2021-05-03 17:06:08,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4777 transitions. [2021-05-03 17:06:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:08,679 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:08,679 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:08,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:08,879 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-05-03 17:06:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:08,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079363304] [2021-05-03 17:06:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:09,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079363304] [2021-05-03 17:06:09,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634692391] [2021-05-03 17:06:09,386 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:06:09,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:06:09,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:09,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:09,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:09,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:09,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:06:09,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:09,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:09,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:09,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:06:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:09,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:09,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 17:06:09,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981694477] [2021-05-03 17:06:09,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:06:09,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:06:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:06:09,635 INFO L87 Difference]: Start difference. First operand 1407 states and 4777 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:11,742 INFO L93 Difference]: Finished difference Result 2051 states and 6623 transitions. [2021-05-03 17:06:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 17:06:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:11,747 INFO L225 Difference]: With dead ends: 2051 [2021-05-03 17:06:11,747 INFO L226 Difference]: Without dead ends: 2029 [2021-05-03 17:06:11,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1957.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:06:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-05-03 17:06:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1414. [2021-05-03 17:06:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.3984430290162773) internal successors, (4802), 1413 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4802 transitions. [2021-05-03 17:06:11,778 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4802 transitions. Word has length 26 [2021-05-03 17:06:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:11,778 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4802 transitions. [2021-05-03 17:06:11,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4802 transitions. [2021-05-03 17:06:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:11,780 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:11,780 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:11,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-03 17:06:11,981 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-05-03 17:06:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:11,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365298057] [2021-05-03 17:06:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:12,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365298057] [2021-05-03 17:06:12,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020576222] [2021-05-03 17:06:12,293 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 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 [2021-05-03 17:06:12,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:06:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 17:06:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:12,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:12,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-05-03 17:06:12,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:06:13,180 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2021-05-03 17:06:13,181 INFO L628 ElimStorePlain]: treesize reduction 196, result has 42.5 percent of original size [2021-05-03 17:06:13,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:13,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:530 [2021-05-03 17:06:13,692 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-05-03 17:06:13,928 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-03 17:06:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:13,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:13,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-05-03 17:06:13,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635588749] [2021-05-03 17:06:13,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 17:06:13,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 17:06:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:06:13,967 INFO L87 Difference]: Start difference. First operand 1414 states and 4802 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:17,422 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 17:06:17,869 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-05-03 17:06:18,277 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-05-03 17:06:18,567 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-05-03 17:06:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:18,650 INFO L93 Difference]: Finished difference Result 2512 states and 8095 transitions. [2021-05-03 17:06:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 17:06:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:18,655 INFO L225 Difference]: With dead ends: 2512 [2021-05-03 17:06:18,655 INFO L226 Difference]: Without dead ends: 2497 [2021-05-03 17:06:18,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 4344.3ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 17:06:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-05-03 17:06:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1424. [2021-05-03 17:06:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.399156711173577) internal successors, (4837), 1423 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4837 transitions. [2021-05-03 17:06:18,683 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4837 transitions. Word has length 26 [2021-05-03 17:06:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:18,683 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 4837 transitions. [2021-05-03 17:06:18,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4837 transitions. [2021-05-03 17:06:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:18,685 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:18,685 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:18,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:18,897 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:18,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-05-03 17:06:18,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:18,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194615687] [2021-05-03 17:06:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:19,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194615687] [2021-05-03 17:06:19,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123646656] [2021-05-03 17:06:19,232 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 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 [2021-05-03 17:06:19,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:06:19,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:19,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:06:19,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:19,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:19,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:06:19,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:19,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:19,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:19,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:06:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:19,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:19,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:06:19,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254576769] [2021-05-03 17:06:19,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:19,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:19,493 INFO L87 Difference]: Start difference. First operand 1424 states and 4837 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:20,371 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 17:06:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:22,271 INFO L93 Difference]: Finished difference Result 3025 states and 9657 transitions. [2021-05-03 17:06:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 17:06:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:22,278 INFO L225 Difference]: With dead ends: 3025 [2021-05-03 17:06:22,279 INFO L226 Difference]: Without dead ends: 2989 [2021-05-03 17:06:22,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2210.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:06:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-05-03 17:06:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1557. [2021-05-03 17:06:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.417095115681234) internal successors, (5317), 1556 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5317 transitions. [2021-05-03 17:06:22,316 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5317 transitions. Word has length 26 [2021-05-03 17:06:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:22,316 INFO L480 AbstractCegarLoop]: Abstraction has 1557 states and 5317 transitions. [2021-05-03 17:06:22,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5317 transitions. [2021-05-03 17:06:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:22,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:22,319 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:22,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-03 17:06:22,525 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-05-03 17:06:22,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:22,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733312521] [2021-05-03 17:06:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:22,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733312521] [2021-05-03 17:06:22,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087228802] [2021-05-03 17:06:22,897 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 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 [2021-05-03 17:06:22,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:06:22,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:22,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:22,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:23,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:23,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:23,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-05-03 17:06:23,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:06:23,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:23,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:23,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-05-03 17:06:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:23,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:23,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:06:23,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63884073] [2021-05-03 17:06:23,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:23,192 INFO L87 Difference]: Start difference. First operand 1557 states and 5317 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:23,643 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 17:06:24,032 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 17:06:24,191 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 17:06:25,773 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 17:06:26,470 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-03 17:06:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:26,608 INFO L93 Difference]: Finished difference Result 3407 states and 10755 transitions. [2021-05-03 17:06:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 17:06:26,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:26,614 INFO L225 Difference]: With dead ends: 3407 [2021-05-03 17:06:26,614 INFO L226 Difference]: Without dead ends: 3350 [2021-05-03 17:06:26,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2995.2ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:06:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-05-03 17:06:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1580. [2021-05-03 17:06:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-05-03 17:06:26,643 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-05-03 17:06:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:26,643 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-05-03 17:06:26,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-05-03 17:06:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:26,645 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:26,645 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:26,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:26,846 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:26,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-05-03 17:06:26,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:26,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52671754] [2021-05-03 17:06:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52671754] [2021-05-03 17:06:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91737337] [2021-05-03 17:06:27,102 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 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 [2021-05-03 17:06:27,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:06:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:06:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:27,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-05-03 17:06:27,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:27,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:27,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 17:06:27,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:182 [2021-05-03 17:06:27,762 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 17:06:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:27,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:27,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-05-03 17:06:27,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178648970] [2021-05-03 17:06:27,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:27,807 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:28,315 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2021-05-03 17:06:28,694 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-05-03 17:06:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:30,953 INFO L93 Difference]: Finished difference Result 2188 states and 7228 transitions. [2021-05-03 17:06:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 17:06:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:30,958 INFO L225 Difference]: With dead ends: 2188 [2021-05-03 17:06:30,959 INFO L226 Difference]: Without dead ends: 2158 [2021-05-03 17:06:30,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2639.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:06:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-05-03 17:06:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1591. [2021-05-03 17:06:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.419496855345912) internal successors, (5437), 1590 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5437 transitions. [2021-05-03 17:06:30,986 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5437 transitions. Word has length 26 [2021-05-03 17:06:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:30,987 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5437 transitions. [2021-05-03 17:06:30,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5437 transitions. [2021-05-03 17:06:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:30,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:30,989 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:31,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 17:06:31,190 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:31,190 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-05-03 17:06:31,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:31,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505278166] [2021-05-03 17:06:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:31,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505278166] [2021-05-03 17:06:31,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401689958] [2021-05-03 17:06:31,458 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 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 [2021-05-03 17:06:31,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:06:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:31,679 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-05-03 17:06:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-05-03 17:06:31,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:31,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:31,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:31,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-05-03 17:06:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:31,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:31,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:06:31,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894514130] [2021-05-03 17:06:31,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:31,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:31,761 INFO L87 Difference]: Start difference. First operand 1591 states and 5437 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:33,945 INFO L93 Difference]: Finished difference Result 2267 states and 7551 transitions. [2021-05-03 17:06:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:06:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:33,950 INFO L225 Difference]: With dead ends: 2267 [2021-05-03 17:06:33,950 INFO L226 Difference]: Without dead ends: 2248 [2021-05-03 17:06:33,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1681.9ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:06:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-05-03 17:06:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1594. [2021-05-03 17:06:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.418706842435656) internal successors, (5446), 1593 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5446 transitions. [2021-05-03 17:06:33,988 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5446 transitions. Word has length 26 [2021-05-03 17:06:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:33,988 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5446 transitions. [2021-05-03 17:06:33,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5446 transitions. [2021-05-03 17:06:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:33,991 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:33,991 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:34,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:34,192 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:34,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-05-03 17:06:34,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:34,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323171750] [2021-05-03 17:06:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:34,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323171750] [2021-05-03 17:06:34,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124325378] [2021-05-03 17:06:34,494 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 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 [2021-05-03 17:06:34,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:06:34,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:06:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:34,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:34,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:06:34,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:06:34,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:34,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:34,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-05-03 17:06:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:34,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:34,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:06:34,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341112010] [2021-05-03 17:06:34,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:34,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:34,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:34,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:34,870 INFO L87 Difference]: Start difference. First operand 1594 states and 5446 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:36,847 INFO L93 Difference]: Finished difference Result 2170 states and 7222 transitions. [2021-05-03 17:06:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:06:36,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:36,853 INFO L225 Difference]: With dead ends: 2170 [2021-05-03 17:06:36,853 INFO L226 Difference]: Without dead ends: 2145 [2021-05-03 17:06:36,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1544.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:06:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-05-03 17:06:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1588. [2021-05-03 17:06:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.420289855072464) internal successors, (5428), 1587 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5428 transitions. [2021-05-03 17:06:36,883 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5428 transitions. Word has length 26 [2021-05-03 17:06:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:36,883 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5428 transitions. [2021-05-03 17:06:36,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5428 transitions. [2021-05-03 17:06:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:36,886 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:36,886 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:37,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-03 17:06:37,100 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:37,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-05-03 17:06:37,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:37,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313431032] [2021-05-03 17:06:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:37,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313431032] [2021-05-03 17:06:37,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537369436] [2021-05-03 17:06:37,443 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 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 [2021-05-03 17:06:37,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:06:37,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:37,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:37,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:37,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:37,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:06:37,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:37,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:37,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:37,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:06:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:37,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:37,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 17:06:37,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528461516] [2021-05-03 17:06:37,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:06:37,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:06:37,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:06:37,740 INFO L87 Difference]: Start difference. First operand 1588 states and 5428 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:39,000 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 17:06:39,172 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 17:06:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:39,729 INFO L93 Difference]: Finished difference Result 2065 states and 6822 transitions. [2021-05-03 17:06:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:06:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:39,735 INFO L225 Difference]: With dead ends: 2065 [2021-05-03 17:06:39,735 INFO L226 Difference]: Without dead ends: 2043 [2021-05-03 17:06:39,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1901.7ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:06:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-05-03 17:06:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1580. [2021-05-03 17:06:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-05-03 17:06:39,765 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-05-03 17:06:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:39,765 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-05-03 17:06:39,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-05-03 17:06:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:39,768 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:39,768 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:39,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-05-03 17:06:39,969 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:39,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-05-03 17:06:39,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:39,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496933931] [2021-05-03 17:06:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:40,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496933931] [2021-05-03 17:06:40,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411829089] [2021-05-03 17:06:40,508 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 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 [2021-05-03 17:06:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:40,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:40,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:40,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:40,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:06:40,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:06:40,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:40,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:40,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:40,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:06:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:40,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:40,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 17:06:40,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338170608] [2021-05-03 17:06:40,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:06:40,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:06:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:06:40,800 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:42,983 INFO L93 Difference]: Finished difference Result 2212 states and 7331 transitions. [2021-05-03 17:06:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:06:42,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:42,988 INFO L225 Difference]: With dead ends: 2212 [2021-05-03 17:06:42,988 INFO L226 Difference]: Without dead ends: 2197 [2021-05-03 17:06:42,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2100.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 17:06:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-05-03 17:06:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1580. [2021-05-03 17:06:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-05-03 17:06:43,015 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-05-03 17:06:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:43,015 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-05-03 17:06:43,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-05-03 17:06:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:43,018 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:43,018 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:43,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:43,229 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-05-03 17:06:43,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:43,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207647015] [2021-05-03 17:06:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:43,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207647015] [2021-05-03 17:06:43,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837322672] [2021-05-03 17:06:43,624 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 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 [2021-05-03 17:06:43,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:06:43,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:44,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:44,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:44,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-05-03 17:06:44,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:06:44,282 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-05-03 17:06:44,283 INFO L628 ElimStorePlain]: treesize reduction 79, result has 51.8 percent of original size [2021-05-03 17:06:44,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:44,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:293 [2021-05-03 17:06:44,533 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-05-03 17:06:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:44,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:44,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-03 17:06:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858532473] [2021-05-03 17:06:44,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:06:44,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:44,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:06:44,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:06:44,713 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:46,359 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-03 17:06:46,536 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 17:06:47,382 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 17:06:47,859 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-05-03 17:06:48,263 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-05-03 17:06:48,657 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-05-03 17:06:48,809 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-03 17:06:48,971 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 17:06:49,989 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-05-03 17:06:50,965 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-05-03 17:06:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:51,046 INFO L93 Difference]: Finished difference Result 2788 states and 8924 transitions. [2021-05-03 17:06:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 17:06:51,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:51,052 INFO L225 Difference]: With dead ends: 2788 [2021-05-03 17:06:51,052 INFO L226 Difference]: Without dead ends: 2747 [2021-05-03 17:06:51,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 5412.6ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 17:06:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-05-03 17:06:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1590. [2021-05-03 17:06:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.42039018250472) internal successors, (5435), 1589 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5435 transitions. [2021-05-03 17:06:51,094 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5435 transitions. Word has length 26 [2021-05-03 17:06:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:51,094 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 5435 transitions. [2021-05-03 17:06:51,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5435 transitions. [2021-05-03 17:06:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:51,097 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:51,097 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:51,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:51,301 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-05-03 17:06:51,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:51,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511194166] [2021-05-03 17:06:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511194166] [2021-05-03 17:06:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677211670] [2021-05-03 17:06:51,721 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 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 [2021-05-03 17:06:51,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:06:51,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:06:51,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:52,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:52,112 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-05-03 17:06:52,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 94 [2021-05-03 17:06:52,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:52,209 INFO L628 ElimStorePlain]: treesize reduction 84, result has 27.6 percent of original size [2021-05-03 17:06:52,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:52,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:46 [2021-05-03 17:06:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:52,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:52,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 17:06:52,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368500910] [2021-05-03 17:06:52,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:06:52,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:52,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:06:52,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:06:52,386 INFO L87 Difference]: Start difference. First operand 1590 states and 5435 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:52,990 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 17:06:53,271 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 17:06:53,604 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 17:06:53,826 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-03 17:06:54,025 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-03 17:06:54,525 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 17:06:55,127 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-03 17:06:55,265 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-05-03 17:06:55,418 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 17:06:56,535 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 17:06:56,712 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 17:06:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:56,916 INFO L93 Difference]: Finished difference Result 2573 states and 8472 transitions. [2021-05-03 17:06:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 17:06:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:06:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:56,921 INFO L225 Difference]: With dead ends: 2573 [2021-05-03 17:06:56,921 INFO L226 Difference]: Without dead ends: 2532 [2021-05-03 17:06:56,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 4109.9ms TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 17:06:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-05-03 17:06:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1583. [2021-05-03 17:06:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4190897597977243) internal successors, (5409), 1582 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5409 transitions. [2021-05-03 17:06:56,946 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5409 transitions. Word has length 26 [2021-05-03 17:06:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:56,946 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 5409 transitions. [2021-05-03 17:06:56,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5409 transitions. [2021-05-03 17:06:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:06:56,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:56,948 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:57,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-03 17:06:57,149 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-05-03 17:06:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:57,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287578511] [2021-05-03 17:06:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:57,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287578511] [2021-05-03 17:06:57,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934950941] [2021-05-03 17:06:57,606 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 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 [2021-05-03 17:06:57,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:06:57,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:57,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:06:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:57,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:57,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:57,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:57,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-05-03 17:06:57,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:06:57,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:57,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:06:57,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-05-03 17:06:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:57,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:57,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:06:57,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151858577] [2021-05-03 17:06:57,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:57,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:57,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:57,969 INFO L87 Difference]: Start difference. First operand 1583 states and 5409 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:58,430 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 17:06:58,886 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-03 17:06:59,930 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-05-03 17:07:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:00,736 INFO L93 Difference]: Finished difference Result 2559 states and 8411 transitions. [2021-05-03 17:07:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:07:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:00,742 INFO L225 Difference]: With dead ends: 2559 [2021-05-03 17:07:00,743 INFO L226 Difference]: Without dead ends: 2514 [2021-05-03 17:07:00,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2295.8ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 17:07:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-05-03 17:07:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1594. [2021-05-03 17:07:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.4199623352165727) internal successors, (5448), 1593 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5448 transitions. [2021-05-03 17:07:00,774 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5448 transitions. Word has length 26 [2021-05-03 17:07:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:00,774 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5448 transitions. [2021-05-03 17:07:00,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5448 transitions. [2021-05-03 17:07:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:00,777 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:00,777 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:00,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-03 17:07:00,978 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:00,978 INFO L82 PathProgramCache]: Analyzing trace with hash -54538374, now seen corresponding path program 53 times [2021-05-03 17:07:00,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:00,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231747817] [2021-05-03 17:07:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:01,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231747817] [2021-05-03 17:07:01,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71938586] [2021-05-03 17:07:01,346 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 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 [2021-05-03 17:07:01,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:07:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:01,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:01,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:01,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:01,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:01,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-05-03 17:07:01,621 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:07:01,648 INFO L628 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2021-05-03 17:07:01,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:01,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-05-03 17:07:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:01,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:01,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-05-03 17:07:01,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138635364] [2021-05-03 17:07:01,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:07:01,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:01,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:07:01,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:01,717 INFO L87 Difference]: Start difference. First operand 1594 states and 5448 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:02,550 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-03 17:07:03,119 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 17:07:03,292 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-05-03 17:07:05,297 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 17:07:05,578 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 17:07:05,799 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 17:07:06,339 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 17:07:07,663 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-03 17:07:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:07,819 INFO L93 Difference]: Finished difference Result 3314 states and 10467 transitions. [2021-05-03 17:07:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 17:07:07,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:07,826 INFO L225 Difference]: With dead ends: 3314 [2021-05-03 17:07:07,826 INFO L226 Difference]: Without dead ends: 3267 [2021-05-03 17:07:07,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 4847.0ms TimeCoverageRelationStatistics Valid=884, Invalid=4372, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 17:07:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-05-03 17:07:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1619. [2021-05-03 17:07:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.4283065512978985) internal successors, (5547), 1618 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5547 transitions. [2021-05-03 17:07:07,856 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5547 transitions. Word has length 26 [2021-05-03 17:07:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:07,856 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5547 transitions. [2021-05-03 17:07:07,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5547 transitions. [2021-05-03 17:07:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:07,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:07,858 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:08,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-03 17:07:08,059 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-05-03 17:07:08,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:08,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463093145] [2021-05-03 17:07:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:08,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463093145] [2021-05-03 17:07:08,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846548446] [2021-05-03 17:07:08,294 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 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 [2021-05-03 17:07:08,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:07:08,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:08,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:08,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:08,694 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-05-03 17:07:08,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 48 [2021-05-03 17:07:08,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:08,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:08,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:08,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:17 [2021-05-03 17:07:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:08,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:08,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:07:08,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524885312] [2021-05-03 17:07:08,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:07:08,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:07:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:08,797 INFO L87 Difference]: Start difference. First operand 1619 states and 5547 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:11,539 INFO L93 Difference]: Finished difference Result 2129 states and 7041 transitions. [2021-05-03 17:07:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:07:11,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:11,544 INFO L225 Difference]: With dead ends: 2129 [2021-05-03 17:07:11,544 INFO L226 Difference]: Without dead ends: 2114 [2021-05-03 17:07:11,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1791.7ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:07:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-05-03 17:07:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1607. [2021-05-03 17:07:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.430884184308842) internal successors, (5510), 1606 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5510 transitions. [2021-05-03 17:07:11,570 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5510 transitions. Word has length 26 [2021-05-03 17:07:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:11,570 INFO L480 AbstractCegarLoop]: Abstraction has 1607 states and 5510 transitions. [2021-05-03 17:07:11,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5510 transitions. [2021-05-03 17:07:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:11,573 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:11,573 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:11,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-03 17:07:11,773 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:11,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-05-03 17:07:11,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:11,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797767264] [2021-05-03 17:07:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:11,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797767264] [2021-05-03 17:07:11,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125043188] [2021-05-03 17:07:11,974 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 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 [2021-05-03 17:07:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:12,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:12,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:12,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:07:12,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:12,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:12,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:12,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:07:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:12,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:12,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:07:12,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273306239] [2021-05-03 17:07:12,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:12,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:12,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:12,333 INFO L87 Difference]: Start difference. First operand 1607 states and 5510 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:12,873 INFO L93 Difference]: Finished difference Result 1918 states and 6461 transitions. [2021-05-03 17:07:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:07:12,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:12,878 INFO L225 Difference]: With dead ends: 1918 [2021-05-03 17:07:12,878 INFO L226 Difference]: Without dead ends: 1903 [2021-05-03 17:07:12,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-05-03 17:07:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1601. [2021-05-03 17:07:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.430625) internal successors, (5489), 1600 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5489 transitions. [2021-05-03 17:07:12,904 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5489 transitions. Word has length 26 [2021-05-03 17:07:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:12,904 INFO L480 AbstractCegarLoop]: Abstraction has 1601 states and 5489 transitions. [2021-05-03 17:07:12,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5489 transitions. [2021-05-03 17:07:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:12,907 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:12,907 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:13,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-05-03 17:07:13,109 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-05-03 17:07:13,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:13,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710895703] [2021-05-03 17:07:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:13,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710895703] [2021-05-03 17:07:13,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214862352] [2021-05-03 17:07:13,328 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 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 [2021-05-03 17:07:13,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:07:13,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:13,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 17:07:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:13,691 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-05-03 17:07:13,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 59 [2021-05-03 17:07:13,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:13,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:13,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:13,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:32 [2021-05-03 17:07:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:13,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:13,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 17:07:13,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916644602] [2021-05-03 17:07:13,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:07:13,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:13,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:07:13,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:13,847 INFO L87 Difference]: Start difference. First operand 1601 states and 5489 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:15,382 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 17:07:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:16,009 INFO L93 Difference]: Finished difference Result 2777 states and 9028 transitions. [2021-05-03 17:07:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:07:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:16,017 INFO L225 Difference]: With dead ends: 2777 [2021-05-03 17:07:16,017 INFO L226 Difference]: Without dead ends: 2726 [2021-05-03 17:07:16,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1796.2ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:07:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-05-03 17:07:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1631. [2021-05-03 17:07:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-05-03 17:07:16,052 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-05-03 17:07:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:16,052 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-05-03 17:07:16,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-05-03 17:07:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:16,055 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:16,055 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:16,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:16,256 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 33 times [2021-05-03 17:07:16,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:16,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680471891] [2021-05-03 17:07:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:16,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680471891] [2021-05-03 17:07:16,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056682177] [2021-05-03 17:07:16,533 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 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 [2021-05-03 17:07:16,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:07:16,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:16,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:17,024 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-05-03 17:07:17,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 41 [2021-05-03 17:07:17,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:17,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:17,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:17,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:5 [2021-05-03 17:07:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:17,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:17,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 17:07:17,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483176807] [2021-05-03 17:07:17,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:17,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:17,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:17,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:17,070 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:18,025 INFO L93 Difference]: Finished difference Result 2060 states and 6895 transitions. [2021-05-03 17:07:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:07:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:18,031 INFO L225 Difference]: With dead ends: 2060 [2021-05-03 17:07:18,031 INFO L226 Difference]: Without dead ends: 2039 [2021-05-03 17:07:18,032 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 877.5ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:07:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-05-03 17:07:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1631. [2021-05-03 17:07:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-05-03 17:07:18,061 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-05-03 17:07:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:18,061 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-05-03 17:07:18,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-05-03 17:07:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:18,064 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:18,064 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:18,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-03 17:07:18,265 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 34 times [2021-05-03 17:07:18,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:18,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451064005] [2021-05-03 17:07:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:18,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451064005] [2021-05-03 17:07:18,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803332250] [2021-05-03 17:07:18,557 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 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 [2021-05-03 17:07:18,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:07:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:18,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:18,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:07:18,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:18,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:18,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:18,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:07:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:18,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:18,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:07:18,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014840814] [2021-05-03 17:07:18,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:18,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:18,957 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:19,540 INFO L93 Difference]: Finished difference Result 1947 states and 6547 transitions. [2021-05-03 17:07:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:07:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:19,546 INFO L225 Difference]: With dead ends: 1947 [2021-05-03 17:07:19,546 INFO L226 Difference]: Without dead ends: 1928 [2021-05-03 17:07:19,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 643.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-03 17:07:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1625. [2021-05-03 17:07:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.440270935960591) internal successors, (5587), 1624 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5587 transitions. [2021-05-03 17:07:19,574 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5587 transitions. Word has length 26 [2021-05-03 17:07:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:19,574 INFO L480 AbstractCegarLoop]: Abstraction has 1625 states and 5587 transitions. [2021-05-03 17:07:19,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5587 transitions. [2021-05-03 17:07:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:19,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:19,577 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:19,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:19,778 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:19,778 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 35 times [2021-05-03 17:07:19,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:19,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451085] [2021-05-03 17:07:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:20,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451085] [2021-05-03 17:07:20,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076293021] [2021-05-03 17:07:20,033 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 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 [2021-05-03 17:07:20,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:07:20,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:20,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 17:07:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:20,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:20,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:20,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-05-03 17:07:20,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:20,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:20,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:20,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:125 [2021-05-03 17:07:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:20,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:20,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 17:07:20,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653397212] [2021-05-03 17:07:20,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:20,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:20,508 INFO L87 Difference]: Start difference. First operand 1625 states and 5587 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:20,970 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 17:07:21,417 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-05-03 17:07:22,655 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 17:07:23,448 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 17:07:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:23,817 INFO L93 Difference]: Finished difference Result 2536 states and 8195 transitions. [2021-05-03 17:07:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 17:07:23,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:23,823 INFO L225 Difference]: With dead ends: 2536 [2021-05-03 17:07:23,823 INFO L226 Difference]: Without dead ends: 2486 [2021-05-03 17:07:23,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2507.0ms TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 17:07:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-05-03 17:07:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1619. [2021-05-03 17:07:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.434487021013597) internal successors, (5557), 1618 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5557 transitions. [2021-05-03 17:07:23,854 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5557 transitions. Word has length 26 [2021-05-03 17:07:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:23,854 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5557 transitions. [2021-05-03 17:07:23,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5557 transitions. [2021-05-03 17:07:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:23,857 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:23,857 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:24,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:24,057 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 36 times [2021-05-03 17:07:24,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:24,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444865576] [2021-05-03 17:07:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:24,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444865576] [2021-05-03 17:07:24,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702797117] [2021-05-03 17:07:24,342 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 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 [2021-05-03 17:07:24,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:07:24,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:24,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:24,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:07:24,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:24,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:24,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:24,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:07:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:24,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:24,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:07:24,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711974496] [2021-05-03 17:07:24,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:24,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:24,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:24,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:24,731 INFO L87 Difference]: Start difference. First operand 1619 states and 5557 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:25,115 INFO L93 Difference]: Finished difference Result 1694 states and 5722 transitions. [2021-05-03 17:07:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:07:25,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:25,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:25,120 INFO L225 Difference]: With dead ends: 1694 [2021-05-03 17:07:25,120 INFO L226 Difference]: Without dead ends: 1675 [2021-05-03 17:07:25,120 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-05-03 17:07:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1611. [2021-05-03 17:07:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.432919254658385) internal successors, (5527), 1610 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5527 transitions. [2021-05-03 17:07:25,146 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5527 transitions. Word has length 26 [2021-05-03 17:07:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:25,146 INFO L480 AbstractCegarLoop]: Abstraction has 1611 states and 5527 transitions. [2021-05-03 17:07:25,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5527 transitions. [2021-05-03 17:07:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:25,149 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:25,149 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:25,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:25,353 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 37 times [2021-05-03 17:07:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127633416] [2021-05-03 17:07:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:25,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127633416] [2021-05-03 17:07:25,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966978513] [2021-05-03 17:07:25,662 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 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 [2021-05-03 17:07:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:26,052 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-05-03 17:07:26,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-05-03 17:07:26,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:26,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:26,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:26,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-05-03 17:07:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:26,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:26,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:07:26,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949857041] [2021-05-03 17:07:26,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:26,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:26,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:26,104 INFO L87 Difference]: Start difference. First operand 1611 states and 5527 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:26,530 INFO L93 Difference]: Finished difference Result 1742 states and 5886 transitions. [2021-05-03 17:07:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:07:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:26,536 INFO L225 Difference]: With dead ends: 1742 [2021-05-03 17:07:26,536 INFO L226 Difference]: Without dead ends: 1727 [2021-05-03 17:07:26,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-05-03 17:07:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1599. [2021-05-03 17:07:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4399249061326658) internal successors, (5497), 1598 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5497 transitions. [2021-05-03 17:07:26,564 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5497 transitions. Word has length 26 [2021-05-03 17:07:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:26,565 INFO L480 AbstractCegarLoop]: Abstraction has 1599 states and 5497 transitions. [2021-05-03 17:07:26,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5497 transitions. [2021-05-03 17:07:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:26,568 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:26,568 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:26,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-05-03 17:07:26,785 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1929714430, now seen corresponding path program 38 times [2021-05-03 17:07:26,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:26,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68382758] [2021-05-03 17:07:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:27,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68382758] [2021-05-03 17:07:27,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665992901] [2021-05-03 17:07:27,103 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 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 [2021-05-03 17:07:27,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:07:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:27,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:27,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:27,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:27,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 17:07:27,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:07:27,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:27,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:27,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-05-03 17:07:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:27,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:27,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:07:27,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775705993] [2021-05-03 17:07:27,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:27,548 INFO L87 Difference]: Start difference. First operand 1599 states and 5497 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:28,955 INFO L93 Difference]: Finished difference Result 2325 states and 7667 transitions. [2021-05-03 17:07:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:07:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:28,960 INFO L225 Difference]: With dead ends: 2325 [2021-05-03 17:07:28,960 INFO L226 Difference]: Without dead ends: 2279 [2021-05-03 17:07:28,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1276.9ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:07:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-05-03 17:07:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1606. [2021-05-03 17:07:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.4386292834890964) internal successors, (5519), 1605 states have internal predecessors, (5519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5519 transitions. [2021-05-03 17:07:28,989 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5519 transitions. Word has length 26 [2021-05-03 17:07:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:28,989 INFO L480 AbstractCegarLoop]: Abstraction has 1606 states and 5519 transitions. [2021-05-03 17:07:28,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5519 transitions. [2021-05-03 17:07:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:28,992 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:28,992 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:29,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-03 17:07:29,193 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1357140426, now seen corresponding path program 39 times [2021-05-03 17:07:29,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:29,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360721386] [2021-05-03 17:07:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360721386] [2021-05-03 17:07:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927691539] [2021-05-03 17:07:29,450 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 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 [2021-05-03 17:07:29,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:07:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:29,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:29,894 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 17:07:29,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-05-03 17:07:29,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:29,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:29,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 17:07:29,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-05-03 17:07:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:30,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:30,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 17:07:30,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808682129] [2021-05-03 17:07:30,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:30,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:30,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:30,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:30,124 INFO L87 Difference]: Start difference. First operand 1606 states and 5519 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:30,563 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 17:07:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:31,627 INFO L93 Difference]: Finished difference Result 2392 states and 7918 transitions. [2021-05-03 17:07:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:07:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:31,633 INFO L225 Difference]: With dead ends: 2392 [2021-05-03 17:07:31,633 INFO L226 Difference]: Without dead ends: 2373 [2021-05-03 17:07:31,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1487.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-03 17:07:31,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-05-03 17:07:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1609. [2021-05-03 17:07:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 3.4353233830845773) internal successors, (5524), 1608 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5524 transitions. [2021-05-03 17:07:31,666 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5524 transitions. Word has length 26 [2021-05-03 17:07:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:31,666 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 5524 transitions. [2021-05-03 17:07:31,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5524 transitions. [2021-05-03 17:07:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:31,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:31,669 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:31,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:31,870 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-05-03 17:07:31,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:31,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771604156] [2021-05-03 17:07:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771604156] [2021-05-03 17:07:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563103883] [2021-05-03 17:07:32,014 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 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 [2021-05-03 17:07:32,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:07:32,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:32,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:32,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:32,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:07:32,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:07:32,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:32,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:32,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-05-03 17:07:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:32,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:32,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 17:07:32,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047021448] [2021-05-03 17:07:32,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:32,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:32,359 INFO L87 Difference]: Start difference. First operand 1609 states and 5524 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:33,137 INFO L93 Difference]: Finished difference Result 2162 states and 7222 transitions. [2021-05-03 17:07:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:07:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:33,143 INFO L225 Difference]: With dead ends: 2162 [2021-05-03 17:07:33,143 INFO L226 Difference]: Without dead ends: 2137 [2021-05-03 17:07:33,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:07:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-05-03 17:07:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1600. [2021-05-03 17:07:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.434021263289556) internal successors, (5491), 1599 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5491 transitions. [2021-05-03 17:07:33,186 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5491 transitions. Word has length 26 [2021-05-03 17:07:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:33,186 INFO L480 AbstractCegarLoop]: Abstraction has 1600 states and 5491 transitions. [2021-05-03 17:07:33,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5491 transitions. [2021-05-03 17:07:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:33,189 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:33,189 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:33,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-03 17:07:33,390 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:33,390 INFO L82 PathProgramCache]: Analyzing trace with hash -48158490, now seen corresponding path program 41 times [2021-05-03 17:07:33,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:33,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980603124] [2021-05-03 17:07:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:33,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980603124] [2021-05-03 17:07:33,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469907770] [2021-05-03 17:07:33,651 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 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 [2021-05-03 17:07:33,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:07:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:34,126 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-05-03 17:07:34,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-05-03 17:07:34,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:34,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:34,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:34,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-05-03 17:07:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:34,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:34,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:07:34,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379371181] [2021-05-03 17:07:34,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:07:34,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:34,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:07:34,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:34,178 INFO L87 Difference]: Start difference. First operand 1600 states and 5491 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:35,258 INFO L93 Difference]: Finished difference Result 2058 states and 6891 transitions. [2021-05-03 17:07:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:07:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:35,264 INFO L225 Difference]: With dead ends: 2058 [2021-05-03 17:07:35,264 INFO L226 Difference]: Without dead ends: 2043 [2021-05-03 17:07:35,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1130.3ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-05-03 17:07:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-05-03 17:07:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1589. [2021-05-03 17:07:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.434508816120907) internal successors, (5454), 1588 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5454 transitions. [2021-05-03 17:07:35,294 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5454 transitions. Word has length 26 [2021-05-03 17:07:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:35,294 INFO L480 AbstractCegarLoop]: Abstraction has 1589 states and 5454 transitions. [2021-05-03 17:07:35,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5454 transitions. [2021-05-03 17:07:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:35,297 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:35,297 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:35,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:35,498 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 42 times [2021-05-03 17:07:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:35,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044962435] [2021-05-03 17:07:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044962435] [2021-05-03 17:07:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91849104] [2021-05-03 17:07:35,819 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:07:35,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:07:35,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:35,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 17:07:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:36,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:36,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2021-05-03 17:07:36,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:36,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:36,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:36,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:25 [2021-05-03 17:07:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:36,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:36,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:07:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132366748] [2021-05-03 17:07:36,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:07:36,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:07:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:36,331 INFO L87 Difference]: Start difference. First operand 1589 states and 5454 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:38,679 INFO L93 Difference]: Finished difference Result 2237 states and 7390 transitions. [2021-05-03 17:07:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:07:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:38,685 INFO L225 Difference]: With dead ends: 2237 [2021-05-03 17:07:38,685 INFO L226 Difference]: Without dead ends: 2207 [2021-05-03 17:07:38,685 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1703.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:07:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-05-03 17:07:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1640. [2021-05-03 17:07:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.4283099450884684) internal successors, (5619), 1639 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5619 transitions. [2021-05-03 17:07:38,716 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5619 transitions. Word has length 26 [2021-05-03 17:07:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:38,716 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 5619 transitions. [2021-05-03 17:07:38,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5619 transitions. [2021-05-03 17:07:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:38,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:38,719 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:38,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:38,933 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 43 times [2021-05-03 17:07:38,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:38,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826110979] [2021-05-03 17:07:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:39,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826110979] [2021-05-03 17:07:39,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271730373] [2021-05-03 17:07:39,257 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 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 [2021-05-03 17:07:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:39,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:39,652 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-05-03 17:07:39,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-05-03 17:07:39,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:39,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:39,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:39,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-05-03 17:07:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:39,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:39,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 17:07:39,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999515237] [2021-05-03 17:07:39,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:39,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:39,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:39,769 INFO L87 Difference]: Start difference. First operand 1640 states and 5619 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:40,906 INFO L93 Difference]: Finished difference Result 2346 states and 7809 transitions. [2021-05-03 17:07:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:07:40,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:40,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:40,913 INFO L225 Difference]: With dead ends: 2346 [2021-05-03 17:07:40,913 INFO L226 Difference]: Without dead ends: 2331 [2021-05-03 17:07:40,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1060.8ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:07:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-05-03 17:07:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1634. [2021-05-03 17:07:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.4280465401102265) internal successors, (5598), 1633 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5598 transitions. [2021-05-03 17:07:40,947 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5598 transitions. Word has length 26 [2021-05-03 17:07:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:40,947 INFO L480 AbstractCegarLoop]: Abstraction has 1634 states and 5598 transitions. [2021-05-03 17:07:40,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5598 transitions. [2021-05-03 17:07:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:40,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:40,950 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:41,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-05-03 17:07:41,152 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 44 times [2021-05-03 17:07:41,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:41,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724199022] [2021-05-03 17:07:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:41,443 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 17:07:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:41,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724199022] [2021-05-03 17:07:41,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247437407] [2021-05-03 17:07:41,514 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 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 [2021-05-03 17:07:41,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:07:41,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 17:07:41,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:41,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:41,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 17:07:41,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:41,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:41,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 17:07:41,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-05-03 17:07:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:42,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:42,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 17:07:42,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979345912] [2021-05-03 17:07:42,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:42,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:42,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:42,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:42,076 INFO L87 Difference]: Start difference. First operand 1634 states and 5598 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:42,861 INFO L93 Difference]: Finished difference Result 2148 states and 7204 transitions. [2021-05-03 17:07:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:07:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:42,867 INFO L225 Difference]: With dead ends: 2148 [2021-05-03 17:07:42,867 INFO L226 Difference]: Without dead ends: 2133 [2021-05-03 17:07:42,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1025.0ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:07:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-05-03 17:07:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1637. [2021-05-03 17:07:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.4315403422982884) internal successors, (5614), 1636 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5614 transitions. [2021-05-03 17:07:42,905 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5614 transitions. Word has length 26 [2021-05-03 17:07:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:42,905 INFO L480 AbstractCegarLoop]: Abstraction has 1637 states and 5614 transitions. [2021-05-03 17:07:42,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5614 transitions. [2021-05-03 17:07:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:42,908 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:42,909 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:43,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-03 17:07:43,109 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 45 times [2021-05-03 17:07:43,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:43,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700713484] [2021-05-03 17:07:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:43,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700713484] [2021-05-03 17:07:43,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318587519] [2021-05-03 17:07:43,368 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:07:43,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:07:43,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 17:07:43,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:43,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:43,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 17:07:43,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:07:43,870 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 17:07:43,872 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.1 percent of original size [2021-05-03 17:07:43,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:07:43,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:76 [2021-05-03 17:07:44,030 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 17:07:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:44,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:44,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 17:07:44,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495545002] [2021-05-03 17:07:44,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:07:44,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:44,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:07:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:07:44,082 INFO L87 Difference]: Start difference. First operand 1637 states and 5614 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2021-05-03 17:07:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:44,951 INFO L93 Difference]: Finished difference Result 2178 states and 7300 transitions. [2021-05-03 17:07:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:07:44,952 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 26 [2021-05-03 17:07:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:44,955 INFO L225 Difference]: With dead ends: 2178 [2021-05-03 17:07:44,956 INFO L226 Difference]: Without dead ends: 2163 [2021-05-03 17:07:44,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:07:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-05-03 17:07:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1655. [2021-05-03 17:07:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.4268440145102783) internal successors, (5668), 1654 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5668 transitions. [2021-05-03 17:07:44,978 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5668 transitions. Word has length 26 [2021-05-03 17:07:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:44,978 INFO L480 AbstractCegarLoop]: Abstraction has 1655 states and 5668 transitions. [2021-05-03 17:07:44,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2021-05-03 17:07:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5668 transitions. [2021-05-03 17:07:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:44,980 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:44,980 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:45,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:45,181 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 46 times [2021-05-03 17:07:45,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:45,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7728934] [2021-05-03 17:07:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7728934] [2021-05-03 17:07:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587936355] [2021-05-03 17:07:45,514 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 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 [2021-05-03 17:07:45,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:07:45,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:45,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:45,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:45,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:45,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-05-03 17:07:45,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:07:45,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:45,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:45,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-05-03 17:07:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:46,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:46,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:07:46,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632243495] [2021-05-03 17:07:46,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:46,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:46,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:46,048 INFO L87 Difference]: Start difference. First operand 1655 states and 5668 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:48,053 INFO L93 Difference]: Finished difference Result 2191 states and 7346 transitions. [2021-05-03 17:07:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:07:48,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:48,058 INFO L225 Difference]: With dead ends: 2191 [2021-05-03 17:07:48,058 INFO L226 Difference]: Without dead ends: 2176 [2021-05-03 17:07:48,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1542.4ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:07:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-05-03 17:07:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1673. [2021-05-03 17:07:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.424043062200957) internal successors, (5725), 1672 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5725 transitions. [2021-05-03 17:07:48,090 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5725 transitions. Word has length 26 [2021-05-03 17:07:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:48,090 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 5725 transitions. [2021-05-03 17:07:48,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5725 transitions. [2021-05-03 17:07:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:48,093 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:48,094 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:48,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-05-03 17:07:48,305 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-05-03 17:07:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:48,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285386396] [2021-05-03 17:07:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:48,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285386396] [2021-05-03 17:07:48,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354220371] [2021-05-03 17:07:48,580 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 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 [2021-05-03 17:07:48,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:07:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:48,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 17:07:48,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:49,042 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 17:07:49,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-05-03 17:07:49,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:49,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:49,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:07:49,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:75 [2021-05-03 17:07:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:49,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:49,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:07:49,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814475795] [2021-05-03 17:07:49,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:07:49,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:49,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:07:49,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:07:49,263 INFO L87 Difference]: Start difference. First operand 1673 states and 5725 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:50,459 INFO L93 Difference]: Finished difference Result 2244 states and 7491 transitions. [2021-05-03 17:07:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:07:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:50,465 INFO L225 Difference]: With dead ends: 2244 [2021-05-03 17:07:50,465 INFO L226 Difference]: Without dead ends: 2219 [2021-05-03 17:07:50,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1217.4ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-05-03 17:07:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-05-03 17:07:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1674. [2021-05-03 17:07:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4273759713090257) internal successors, (5734), 1673 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5734 transitions. [2021-05-03 17:07:50,495 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5734 transitions. Word has length 26 [2021-05-03 17:07:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:50,495 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 5734 transitions. [2021-05-03 17:07:50,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5734 transitions. [2021-05-03 17:07:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:50,498 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:50,498 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:50,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:50,698 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-05-03 17:07:50,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:50,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230734574] [2021-05-03 17:07:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:50,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230734574] [2021-05-03 17:07:50,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640153890] [2021-05-03 17:07:50,992 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 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 [2021-05-03 17:07:51,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:07:51,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:51,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:07:51,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:07:51,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:51,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:51,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-05-03 17:07:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:51,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:51,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:07:51,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938414752] [2021-05-03 17:07:51,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:07:51,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:07:51,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:07:51,409 INFO L87 Difference]: Start difference. First operand 1674 states and 5734 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:52,921 INFO L93 Difference]: Finished difference Result 2307 states and 7682 transitions. [2021-05-03 17:07:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:07:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:52,929 INFO L225 Difference]: With dead ends: 2307 [2021-05-03 17:07:52,929 INFO L226 Difference]: Without dead ends: 2271 [2021-05-03 17:07:52,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1317.0ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:07:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-05-03 17:07:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1692. [2021-05-03 17:07:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4299231224127733) internal successors, (5800), 1691 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5800 transitions. [2021-05-03 17:07:52,963 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5800 transitions. Word has length 26 [2021-05-03 17:07:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:52,963 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5800 transitions. [2021-05-03 17:07:52,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5800 transitions. [2021-05-03 17:07:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:52,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:52,967 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:53,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-05-03 17:07:53,168 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2134220646, now seen corresponding path program 54 times [2021-05-03 17:07:53,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:53,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997457635] [2021-05-03 17:07:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:53,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997457635] [2021-05-03 17:07:53,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908102518] [2021-05-03 17:07:53,656 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 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 [2021-05-03 17:07:53,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:07:53,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:07:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:07:53,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:53,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:53,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:53,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:07:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:53,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:53,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-05-03 17:07:53,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945798512] [2021-05-03 17:07:53,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:07:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:07:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:07:53,967 INFO L87 Difference]: Start difference. First operand 1692 states and 5800 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:54,606 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 17:07:55,358 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 17:07:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:55,488 INFO L93 Difference]: Finished difference Result 2173 states and 7209 transitions. [2021-05-03 17:07:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:07:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:55,494 INFO L225 Difference]: With dead ends: 2173 [2021-05-03 17:07:55,494 INFO L226 Difference]: Without dead ends: 2147 [2021-05-03 17:07:55,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1601.1ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:07:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-05-03 17:07:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1684. [2021-05-03 17:07:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4307783719548426) internal successors, (5774), 1683 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5774 transitions. [2021-05-03 17:07:55,523 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5774 transitions. Word has length 26 [2021-05-03 17:07:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:55,523 INFO L480 AbstractCegarLoop]: Abstraction has 1684 states and 5774 transitions. [2021-05-03 17:07:55,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5774 transitions. [2021-05-03 17:07:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:55,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:55,526 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:55,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:55,727 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-05-03 17:07:55,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:55,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015779335] [2021-05-03 17:07:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:56,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015779335] [2021-05-03 17:07:56,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967720403] [2021-05-03 17:07:56,078 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 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 [2021-05-03 17:07:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:56,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:56,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:56,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:56,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:07:56,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:56,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:56,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:56,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:07:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:56,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:56,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 17:07:56,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82531437] [2021-05-03 17:07:56,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:56,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:56,456 INFO L87 Difference]: Start difference. First operand 1684 states and 5774 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:57,436 INFO L93 Difference]: Finished difference Result 2015 states and 6632 transitions. [2021-05-03 17:07:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:07:57,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:57,442 INFO L225 Difference]: With dead ends: 2015 [2021-05-03 17:07:57,442 INFO L226 Difference]: Without dead ends: 1993 [2021-05-03 17:07:57,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1039.9ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:07:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-05-03 17:07:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1686. [2021-05-03 17:07:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.430860534124629) internal successors, (5781), 1685 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5781 transitions. [2021-05-03 17:07:57,475 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5781 transitions. Word has length 26 [2021-05-03 17:07:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:57,475 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5781 transitions. [2021-05-03 17:07:57,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5781 transitions. [2021-05-03 17:07:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:57,479 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:57,479 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:57,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-05-03 17:07:57,697 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-05-03 17:07:57,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:57,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544020904] [2021-05-03 17:07:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544020904] [2021-05-03 17:07:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57403347] [2021-05-03 17:07:58,218 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 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 [2021-05-03 17:07:58,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:07:58,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:07:58,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:07:58,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:58,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:07:58,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:07:58,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:07:58,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:07:58,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:07:58,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:07:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:58,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:58,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 17:07:58,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605256799] [2021-05-03 17:07:58,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:58,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:58,591 INFO L87 Difference]: Start difference. First operand 1686 states and 5781 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:59,499 INFO L93 Difference]: Finished difference Result 2069 states and 6957 transitions. [2021-05-03 17:07:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:07:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:07:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:59,506 INFO L225 Difference]: With dead ends: 2069 [2021-05-03 17:07:59,506 INFO L226 Difference]: Without dead ends: 2038 [2021-05-03 17:07:59,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1189.9ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:07:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-05-03 17:07:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1692. [2021-05-03 17:07:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-05-03 17:07:59,536 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-05-03 17:07:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:59,536 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-05-03 17:07:59,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-05-03 17:07:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:07:59,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:59,539 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:59,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-05-03 17:07:59,740 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-05-03 17:07:59,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:59,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179729089] [2021-05-03 17:07:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:00,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179729089] [2021-05-03 17:08:00,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597645108] [2021-05-03 17:08:00,154 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 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 [2021-05-03 17:08:00,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:08:00,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:08:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:00,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:00,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:00,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 17:08:00,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:00,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:00,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:00,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:81 [2021-05-03 17:08:00,713 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 17:08:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:00,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:00,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 17:08:00,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997511789] [2021-05-03 17:08:00,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:08:00,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:00,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:08:00,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:08:00,761 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:01,672 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 17:08:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:01,844 INFO L93 Difference]: Finished difference Result 2105 states and 7051 transitions. [2021-05-03 17:08:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:08:01,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:01,850 INFO L225 Difference]: With dead ends: 2105 [2021-05-03 17:08:01,850 INFO L226 Difference]: Without dead ends: 2090 [2021-05-03 17:08:01,850 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1384.3ms TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:08:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-05-03 17:08:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1692. [2021-05-03 17:08:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-05-03 17:08:01,885 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-05-03 17:08:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:01,885 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-05-03 17:08:01,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-05-03 17:08:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:01,887 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:01,887 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:02,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:02,088 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-05-03 17:08:02,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:02,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143127425] [2021-05-03 17:08:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143127425] [2021-05-03 17:08:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081763844] [2021-05-03 17:08:02,508 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 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 [2021-05-03 17:08:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:08:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:02,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:02,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:02,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:02,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 17:08:02,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:08:02,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:02,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:02,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-05-03 17:08:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:02,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:02,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:08:02,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720386169] [2021-05-03 17:08:02,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:08:02,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:02,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:08:02,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:08:02,932 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:04,420 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 17:08:04,666 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-03 17:08:05,535 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 17:08:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:06,979 INFO L93 Difference]: Finished difference Result 2382 states and 7859 transitions. [2021-05-03 17:08:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:08:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:06,987 INFO L225 Difference]: With dead ends: 2382 [2021-05-03 17:08:06,987 INFO L226 Difference]: Without dead ends: 2367 [2021-05-03 17:08:06,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2568.5ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 17:08:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-05-03 17:08:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1699. [2021-05-03 17:08:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 3.4287396937573615) internal successors, (5822), 1698 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 5822 transitions. [2021-05-03 17:08:07,021 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 5822 transitions. Word has length 26 [2021-05-03 17:08:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:07,021 INFO L480 AbstractCegarLoop]: Abstraction has 1699 states and 5822 transitions. [2021-05-03 17:08:07,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:07,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 5822 transitions. [2021-05-03 17:08:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:07,024 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:07,024 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:07,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:07,225 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:07,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-05-03 17:08:07,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:07,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548210193] [2021-05-03 17:08:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:07,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548210193] [2021-05-03 17:08:07,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508008380] [2021-05-03 17:08:07,574 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 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 [2021-05-03 17:08:07,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:08:07,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:08:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:07,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:07,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:07,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:07,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 17:08:07,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:08,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:08,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:08,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-05-03 17:08:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:08,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:08,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 17:08:08,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626149355] [2021-05-03 17:08:08,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:08:08,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:08,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:08:08,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:08:08,052 INFO L87 Difference]: Start difference. First operand 1699 states and 5822 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:10,301 INFO L93 Difference]: Finished difference Result 2569 states and 8218 transitions. [2021-05-03 17:08:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:08:10,302 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:10,306 INFO L225 Difference]: With dead ends: 2569 [2021-05-03 17:08:10,306 INFO L226 Difference]: Without dead ends: 2547 [2021-05-03 17:08:10,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1876.1ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:08:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-05-03 17:08:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 1746. [2021-05-03 17:08:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.428080229226361) internal successors, (5982), 1745 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5982 transitions. [2021-05-03 17:08:10,338 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5982 transitions. Word has length 26 [2021-05-03 17:08:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:10,338 INFO L480 AbstractCegarLoop]: Abstraction has 1746 states and 5982 transitions. [2021-05-03 17:08:10,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5982 transitions. [2021-05-03 17:08:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:10,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:10,341 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:10,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:10,542 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-05-03 17:08:10,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:10,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577984146] [2021-05-03 17:08:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577984146] [2021-05-03 17:08:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97462981] [2021-05-03 17:08:10,845 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 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 [2021-05-03 17:08:10,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:08:10,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:10,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 17:08:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:11,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:11,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:11,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-05-03 17:08:11,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:11,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:11,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:11,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-05-03 17:08:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:11,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:11,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:08:11,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721653747] [2021-05-03 17:08:11,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:08:11,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:11,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:08:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:08:11,282 INFO L87 Difference]: Start difference. First operand 1746 states and 5982 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:13,528 INFO L93 Difference]: Finished difference Result 3031 states and 9775 transitions. [2021-05-03 17:08:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:08:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:13,535 INFO L225 Difference]: With dead ends: 3031 [2021-05-03 17:08:13,535 INFO L226 Difference]: Without dead ends: 3001 [2021-05-03 17:08:13,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1603.4ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 17:08:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-05-03 17:08:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1808. [2021-05-03 17:08:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 3.4305478693967904) internal successors, (6199), 1807 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 6199 transitions. [2021-05-03 17:08:13,575 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 6199 transitions. Word has length 26 [2021-05-03 17:08:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:13,575 INFO L480 AbstractCegarLoop]: Abstraction has 1808 states and 6199 transitions. [2021-05-03 17:08:13,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 6199 transitions. [2021-05-03 17:08:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:13,578 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:13,578 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:13,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:13,779 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:13,779 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-05-03 17:08:13,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:13,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114908090] [2021-05-03 17:08:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:14,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114908090] [2021-05-03 17:08:14,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574443986] [2021-05-03 17:08:14,127 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 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 [2021-05-03 17:08:14,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:08:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:14,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:08:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:14,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:14,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-05-03 17:08:14,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:08:15,005 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-05-03 17:08:15,006 INFO L628 ElimStorePlain]: treesize reduction 95, result has 45.4 percent of original size [2021-05-03 17:08:15,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:15,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:325 [2021-05-03 17:08:15,367 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-05-03 17:08:15,551 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 17:08:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:15,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:15,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 17:08:15,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008526093] [2021-05-03 17:08:15,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:08:15,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:08:15,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:08:15,649 INFO L87 Difference]: Start difference. First operand 1808 states and 6199 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:16,088 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 17:08:16,308 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 17:08:16,582 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 17:08:17,851 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 17:08:18,032 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 17:08:18,396 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-03 17:08:19,005 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-05-03 17:08:19,434 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-05-03 17:08:19,958 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-05-03 17:08:20,238 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 17:08:20,660 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-05-03 17:08:21,005 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-05-03 17:08:21,197 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-05-03 17:08:21,519 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-05-03 17:08:21,838 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-05-03 17:08:22,363 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-05-03 17:08:22,698 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-05-03 17:08:22,881 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-05-03 17:08:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:23,054 INFO L93 Difference]: Finished difference Result 3468 states and 10976 transitions. [2021-05-03 17:08:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 17:08:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:23,066 INFO L225 Difference]: With dead ends: 3468 [2021-05-03 17:08:23,066 INFO L226 Difference]: Without dead ends: 3395 [2021-05-03 17:08:23,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 6308.6ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 17:08:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-05-03 17:08:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 1827. [2021-05-03 17:08:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.4342825848849947) internal successors, (6271), 1826 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6271 transitions. [2021-05-03 17:08:23,109 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6271 transitions. Word has length 26 [2021-05-03 17:08:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:23,109 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6271 transitions. [2021-05-03 17:08:23,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6271 transitions. [2021-05-03 17:08:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:23,113 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:23,113 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:23,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:23,313 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 50 times [2021-05-03 17:08:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:23,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653988032] [2021-05-03 17:08:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:23,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653988032] [2021-05-03 17:08:23,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162361073] [2021-05-03 17:08:23,745 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 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 [2021-05-03 17:08:23,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:08:23,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:08:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:24,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 17:08:24,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:24,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:24,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:24,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-05-03 17:08:24,689 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 17:08:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:24,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:24,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:08:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463167746] [2021-05-03 17:08:24,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:08:24,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:24,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:08:24,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:08:24,867 INFO L87 Difference]: Start difference. First operand 1827 states and 6271 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:25,138 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 17:08:25,280 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 21 [2021-05-03 17:08:25,826 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 17:08:26,086 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-03 17:08:26,751 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 17:08:26,920 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 17:08:28,476 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 17:08:28,808 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 17:08:29,466 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-03 17:08:29,962 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 17:08:30,217 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-05-03 17:08:30,769 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 17:08:31,026 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 17:08:31,339 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-03 17:08:31,704 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 17:08:31,992 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-05-03 17:08:32,434 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-03 17:08:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:32,720 INFO L93 Difference]: Finished difference Result 2596 states and 8537 transitions. [2021-05-03 17:08:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 17:08:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:32,727 INFO L225 Difference]: With dead ends: 2596 [2021-05-03 17:08:32,727 INFO L226 Difference]: Without dead ends: 2581 [2021-05-03 17:08:32,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 5862.9ms TimeCoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 17:08:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-05-03 17:08:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 1845. [2021-05-03 17:08:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 3.4322125813449023) internal successors, (6329), 1844 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 6329 transitions. [2021-05-03 17:08:32,764 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 6329 transitions. Word has length 26 [2021-05-03 17:08:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:32,764 INFO L480 AbstractCegarLoop]: Abstraction has 1845 states and 6329 transitions. [2021-05-03 17:08:32,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 6329 transitions. [2021-05-03 17:08:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:32,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:32,768 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:32,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:32,968 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:32,968 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 51 times [2021-05-03 17:08:32,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:32,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076618714] [2021-05-03 17:08:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:33,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076618714] [2021-05-03 17:08:33,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191306808] [2021-05-03 17:08:33,321 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 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 [2021-05-03 17:08:33,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:08:33,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 17:08:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:33,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:33,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 17:08:33,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:33,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:33,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:33,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-05-03 17:08:33,931 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 17:08:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:34,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:34,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-05-03 17:08:34,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171111956] [2021-05-03 17:08:34,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:08:34,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:08:34,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:08:34,114 INFO L87 Difference]: Start difference. First operand 1845 states and 6329 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:34,673 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 17:08:35,061 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 17:08:35,468 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-05-03 17:08:35,746 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-05-03 17:08:36,052 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 17:08:36,536 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 17:08:36,708 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 17:08:36,863 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 17:08:37,754 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 17:08:37,953 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 17:08:38,136 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 17:08:38,640 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-05-03 17:08:39,150 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 17:08:39,499 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-05-03 17:08:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:39,917 INFO L93 Difference]: Finished difference Result 2945 states and 9563 transitions. [2021-05-03 17:08:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 17:08:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:39,926 INFO L225 Difference]: With dead ends: 2945 [2021-05-03 17:08:39,927 INFO L226 Difference]: Without dead ends: 2930 [2021-05-03 17:08:39,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 4286.8ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 17:08:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-05-03 17:08:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1841. [2021-05-03 17:08:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.429891304347826) internal successors, (6311), 1840 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6311 transitions. [2021-05-03 17:08:39,975 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6311 transitions. Word has length 26 [2021-05-03 17:08:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:39,976 INFO L480 AbstractCegarLoop]: Abstraction has 1841 states and 6311 transitions. [2021-05-03 17:08:39,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6311 transitions. [2021-05-03 17:08:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:39,979 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:39,979 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:40,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-05-03 17:08:40,180 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:40,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 52 times [2021-05-03 17:08:40,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:40,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250556351] [2021-05-03 17:08:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:40,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250556351] [2021-05-03 17:08:40,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667099137] [2021-05-03 17:08:40,536 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 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 [2021-05-03 17:08:40,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:08:40,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:08:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:40,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:40,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:08:40,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:08:40,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:40,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:40,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-05-03 17:08:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:41,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:41,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 17:08:41,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746716083] [2021-05-03 17:08:41,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:08:41,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:41,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:08:41,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:08:41,078 INFO L87 Difference]: Start difference. First operand 1841 states and 6311 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:41,845 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 17:08:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:43,704 INFO L93 Difference]: Finished difference Result 2554 states and 8486 transitions. [2021-05-03 17:08:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 17:08:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:43,711 INFO L225 Difference]: With dead ends: 2554 [2021-05-03 17:08:43,712 INFO L226 Difference]: Without dead ends: 2529 [2021-05-03 17:08:43,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1767.8ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 17:08:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-05-03 17:08:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1829. [2021-05-03 17:08:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.4343544857768054) internal successors, (6278), 1828 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6278 transitions. [2021-05-03 17:08:43,747 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6278 transitions. Word has length 26 [2021-05-03 17:08:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:43,747 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6278 transitions. [2021-05-03 17:08:43,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6278 transitions. [2021-05-03 17:08:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:43,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:43,751 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:43,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-05-03 17:08:43,951 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-05-03 17:08:43,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:43,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554567661] [2021-05-03 17:08:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554567661] [2021-05-03 17:08:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929351699] [2021-05-03 17:08:44,179 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 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 [2021-05-03 17:08:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:44,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:08:44,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:44,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:44,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:44,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:44,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-05-03 17:08:44,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:44,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:44,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:44,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-05-03 17:08:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:44,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:44,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 17:08:44,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389242594] [2021-05-03 17:08:44,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:08:44,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:08:44,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:08:44,622 INFO L87 Difference]: Start difference. First operand 1829 states and 6278 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:45,099 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 17:08:46,504 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 17:08:46,839 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 17:08:47,231 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 17:08:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:48,014 INFO L93 Difference]: Finished difference Result 2460 states and 8152 transitions. [2021-05-03 17:08:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:08:48,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:48,021 INFO L225 Difference]: With dead ends: 2460 [2021-05-03 17:08:48,021 INFO L226 Difference]: Without dead ends: 2438 [2021-05-03 17:08:48,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2300.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:08:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-05-03 17:08:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1826. [2021-05-03 17:08:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.433972602739726) internal successors, (6267), 1825 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6267 transitions. [2021-05-03 17:08:48,058 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6267 transitions. Word has length 26 [2021-05-03 17:08:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:48,058 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 6267 transitions. [2021-05-03 17:08:48,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6267 transitions. [2021-05-03 17:08:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:48,061 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:48,061 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:48,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-05-03 17:08:48,262 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:48,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-05-03 17:08:48,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:48,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899358186] [2021-05-03 17:08:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:48,603 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-05-03 17:08:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:48,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899358186] [2021-05-03 17:08:48,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144023584] [2021-05-03 17:08:48,812 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:48,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:08:48,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:48,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:08:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:49,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:49,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:49,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 17:08:49,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:49,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:49,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:49,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-05-03 17:08:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:49,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:49,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 17:08:49,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087155820] [2021-05-03 17:08:49,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:08:49,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:49,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:08:49,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:08:49,456 INFO L87 Difference]: Start difference. First operand 1826 states and 6267 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:50,179 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 17:08:50,536 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 17:08:50,930 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 17:08:51,601 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 17:08:52,617 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 17:08:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:52,912 INFO L93 Difference]: Finished difference Result 2532 states and 8399 transitions. [2021-05-03 17:08:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:08:52,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:52,920 INFO L225 Difference]: With dead ends: 2532 [2021-05-03 17:08:52,920 INFO L226 Difference]: Without dead ends: 2513 [2021-05-03 17:08:52,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2976.7ms TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 17:08:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-05-03 17:08:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1829. [2021-05-03 17:08:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.435995623632385) internal successors, (6281), 1828 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6281 transitions. [2021-05-03 17:08:52,955 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6281 transitions. Word has length 26 [2021-05-03 17:08:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:52,955 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6281 transitions. [2021-05-03 17:08:52,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6281 transitions. [2021-05-03 17:08:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:52,959 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:52,959 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:53,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:53,159 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-05-03 17:08:53,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:53,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939113206] [2021-05-03 17:08:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939113206] [2021-05-03 17:08:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345359601] [2021-05-03 17:08:53,608 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 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 [2021-05-03 17:08:53,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:08:53,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:08:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:53,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-05-03 17:08:54,001 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:08:54,056 INFO L628 ElimStorePlain]: treesize reduction 17, result has 55.3 percent of original size [2021-05-03 17:08:54,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:54,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-05-03 17:08:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:54,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:54,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:08:54,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067220953] [2021-05-03 17:08:54,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:08:54,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:08:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:08:54,198 INFO L87 Difference]: Start difference. First operand 1829 states and 6281 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:54,539 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 17:08:55,109 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 17:08:55,735 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 17:08:55,910 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 17:08:56,164 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 17:08:56,324 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 17:08:57,399 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 17:08:57,797 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 17:08:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:58,022 INFO L93 Difference]: Finished difference Result 2965 states and 9658 transitions. [2021-05-03 17:08:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:08:58,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:08:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:58,030 INFO L225 Difference]: With dead ends: 2965 [2021-05-03 17:08:58,030 INFO L226 Difference]: Without dead ends: 2921 [2021-05-03 17:08:58,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3332.3ms TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 17:08:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-03 17:08:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1870. [2021-05-03 17:08:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.431246655965757) internal successors, (6413), 1869 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6413 transitions. [2021-05-03 17:08:58,071 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6413 transitions. Word has length 26 [2021-05-03 17:08:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:58,072 INFO L480 AbstractCegarLoop]: Abstraction has 1870 states and 6413 transitions. [2021-05-03 17:08:58,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6413 transitions. [2021-05-03 17:08:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:08:58,075 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:58,075 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:58,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-05-03 17:08:58,276 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 53 times [2021-05-03 17:08:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:58,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974885698] [2021-05-03 17:08:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:58,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974885698] [2021-05-03 17:08:58,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130536932] [2021-05-03 17:08:58,642 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 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 [2021-05-03 17:08:58,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:08:58,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 17:08:58,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:59,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:59,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 17:08:59,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:59,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:59,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:08:59,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 17:08:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:59,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:59,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:08:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130205245] [2021-05-03 17:08:59,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:08:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:08:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:08:59,037 INFO L87 Difference]: Start difference. First operand 1870 states and 6413 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:59,210 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 17:09:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:01,035 INFO L93 Difference]: Finished difference Result 2376 states and 7962 transitions. [2021-05-03 17:09:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:09:01,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:09:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:01,042 INFO L225 Difference]: With dead ends: 2376 [2021-05-03 17:09:01,042 INFO L226 Difference]: Without dead ends: 2361 [2021-05-03 17:09:01,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1327.5ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:09:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-05-03 17:09:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1867. [2021-05-03 17:09:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4260450160771705) internal successors, (6393), 1866 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6393 transitions. [2021-05-03 17:09:01,070 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6393 transitions. Word has length 26 [2021-05-03 17:09:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:01,070 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6393 transitions. [2021-05-03 17:09:01,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6393 transitions. [2021-05-03 17:09:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:09:01,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:01,072 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:01,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:01,273 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 54 times [2021-05-03 17:09:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:01,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558237810] [2021-05-03 17:09:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:01,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558237810] [2021-05-03 17:09:01,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652458254] [2021-05-03 17:09:01,644 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 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 [2021-05-03 17:09:01,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:09:01,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 17:09:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:02,090 INFO L354 Elim1Store]: treesize reduction 35, result has 36.4 percent of original size [2021-05-03 17:09:02,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 67 [2021-05-03 17:09:02,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:09:02,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:09:02,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:09:02,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:35 [2021-05-03 17:09:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:02,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:02,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 17:09:02,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974995684] [2021-05-03 17:09:02,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:09:02,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:09:02,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:09:02,361 INFO L87 Difference]: Start difference. First operand 1867 states and 6393 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:03,495 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 17:09:04,193 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 17:09:05,202 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 17:09:05,423 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-05-03 17:09:05,729 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 17:09:06,172 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-05-03 17:09:06,395 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-03 17:09:06,681 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-05-03 17:09:07,054 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 17:09:07,625 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 17:09:08,015 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 17:09:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:08,299 INFO L93 Difference]: Finished difference Result 2818 states and 9211 transitions. [2021-05-03 17:09:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:09:08,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:09:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:08,307 INFO L225 Difference]: With dead ends: 2818 [2021-05-03 17:09:08,308 INFO L226 Difference]: Without dead ends: 2753 [2021-05-03 17:09:08,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 4155.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:09:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-05-03 17:09:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1890. [2021-05-03 17:09:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4187400741132876) internal successors, (6458), 1889 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6458 transitions. [2021-05-03 17:09:08,359 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6458 transitions. Word has length 26 [2021-05-03 17:09:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:08,359 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6458 transitions. [2021-05-03 17:09:08,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6458 transitions. [2021-05-03 17:09:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:09:08,362 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:08,362 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:08,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-05-03 17:09:08,563 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:08,563 INFO L82 PathProgramCache]: Analyzing trace with hash -322804878, now seen corresponding path program 55 times [2021-05-03 17:09:08,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:08,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275328] [2021-05-03 17:09:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:08,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275328] [2021-05-03 17:09:08,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466320031] [2021-05-03 17:09:08,950 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 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 [2021-05-03 17:09:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:09:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:09,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:09:09,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:09:09,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-05-03 17:09:09,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 17:09:09,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:09:09,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:09:09,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-05-03 17:09:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:09,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:09,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:09:09,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729436658] [2021-05-03 17:09:09,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:09:09,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:09:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:09:09,537 INFO L87 Difference]: Start difference. First operand 1890 states and 6458 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:09,883 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 17:09:10,605 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 17:09:11,173 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 17:09:11,785 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 17:09:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:12,990 INFO L93 Difference]: Finished difference Result 2691 states and 8967 transitions. [2021-05-03 17:09:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:09:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:09:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:12,999 INFO L225 Difference]: With dead ends: 2691 [2021-05-03 17:09:12,999 INFO L226 Difference]: Without dead ends: 2676 [2021-05-03 17:09:12,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2456.0ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:09:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-05-03 17:09:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1879. [2021-05-03 17:09:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-05-03 17:09:13,037 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-05-03 17:09:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:13,037 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-05-03 17:09:13,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-05-03 17:09:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:09:13,041 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:13,041 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:13,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-05-03 17:09:13,241 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 56 times [2021-05-03 17:09:13,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:13,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095230928] [2021-05-03 17:09:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095230928] [2021-05-03 17:09:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890449016] [2021-05-03 17:09:13,621 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 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 [2021-05-03 17:09:13,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:09:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 17:09:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:14,105 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-05-03 17:09:14,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-05-03 17:09:14,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:09:14,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:09:14,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:09:14,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-05-03 17:09:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:14,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:14,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:09:14,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808088926] [2021-05-03 17:09:14,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:09:14,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:14,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:09:14,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:09:14,280 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:14,680 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 17:09:15,300 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 17:09:16,099 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-05-03 17:09:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:16,875 INFO L93 Difference]: Finished difference Result 2580 states and 8592 transitions. [2021-05-03 17:09:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:09:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:09:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:16,884 INFO L225 Difference]: With dead ends: 2580 [2021-05-03 17:09:16,884 INFO L226 Difference]: Without dead ends: 2544 [2021-05-03 17:09:16,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2047.7ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 17:09:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-05-03 17:09:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1879. [2021-05-03 17:09:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-05-03 17:09:16,922 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-05-03 17:09:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:16,922 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-05-03 17:09:16,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-05-03 17:09:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:09:16,925 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:16,925 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:17,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-05-03 17:09:17,127 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 64 times [2021-05-03 17:09:17,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:17,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015172571] [2021-05-03 17:09:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:17,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015172571] [2021-05-03 17:09:17,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433583030] [2021-05-03 17:09:17,757 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 [2021-05-03 17:09:17,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:09:17,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:17,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:09:17,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:18,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:09:18,344 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-05-03 17:09:18,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 56 [2021-05-03 17:09:18,351 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:09:18,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:09:18,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:09:18,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:10 [2021-05-03 17:09:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:18,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:18,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 17:09:18,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694547657] [2021-05-03 17:09:18,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:09:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:09:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:09:18,423 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:18,977 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-05-03 17:09:19,123 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 17:09:19,305 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 17:09:19,518 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 17:09:19,886 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 17:09:20,216 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 17:09:20,449 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 17:09:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:21,516 INFO L93 Difference]: Finished difference Result 2397 states and 7991 transitions. [2021-05-03 17:09:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:09:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:09:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:21,523 INFO L225 Difference]: With dead ends: 2397 [2021-05-03 17:09:21,524 INFO L226 Difference]: Without dead ends: 2382 [2021-05-03 17:09:21,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2863.5ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:09:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-05-03 17:09:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1879. [2021-05-03 17:09:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-05-03 17:09:21,561 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-05-03 17:09:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:21,561 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-05-03 17:09:21,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-05-03 17:09:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 17:09:21,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:21,564 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:21,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:21,765 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -63112514, now seen corresponding path program 65 times [2021-05-03 17:09:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:21,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379367560] [2021-05-03 17:09:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:22,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379367560] [2021-05-03 17:09:22,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911348465] [2021-05-03 17:09:22,214 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 [2021-05-03 17:09:22,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:09:22,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:09:22,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:09:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:09:22,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:09:22,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-05-03 17:09:22,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 17:09:22,675 INFO L628 ElimStorePlain]: treesize reduction 24, result has 46.7 percent of original size [2021-05-03 17:09:22,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:09:22,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-05-03 17:09:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:22,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:22,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:09:22,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310077717] [2021-05-03 17:09:22,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:09:22,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:09:22,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:09:22,828 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:23,760 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 17:09:24,089 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 17:09:24,379 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-03 17:09:25,308 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 17:09:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:25,806 INFO L93 Difference]: Finished difference Result 2617 states and 8669 transitions. [2021-05-03 17:09:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:09:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 17:09:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:25,814 INFO L225 Difference]: With dead ends: 2617 [2021-05-03 17:09:25,814 INFO L226 Difference]: Without dead ends: 2587 [2021-05-03 17:09:25,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2229.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:09:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-05-03 17:09:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1866. [2021-05-03 17:09:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4176943699731903) internal successors, (6374), 1865 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6374 transitions. [2021-05-03 17:09:25,851 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6374 transitions. Word has length 26 [2021-05-03 17:09:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:25,851 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 6374 transitions. [2021-05-03 17:09:25,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6374 transitions. [2021-05-03 17:09:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:25,854 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:25,854 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:26,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:26,055 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 57 times [2021-05-03 17:09:26,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:26,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320195144] [2021-05-03 17:09:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:26,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320195144] [2021-05-03 17:09:26,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212357310] [2021-05-03 17:09:26,165 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 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 [2021-05-03 17:09:26,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:09:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:09:26,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:26,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:26,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:09:26,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419025726] [2021-05-03 17:09:26,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:09:26,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:26,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:09:26,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:09:26,523 INFO L87 Difference]: Start difference. First operand 1866 states and 6374 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:29,329 INFO L93 Difference]: Finished difference Result 4807 states and 14882 transitions. [2021-05-03 17:09:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:09:29,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:29,342 INFO L225 Difference]: With dead ends: 4807 [2021-05-03 17:09:29,342 INFO L226 Difference]: Without dead ends: 4807 [2021-05-03 17:09:29,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1658.4ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 17:09:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-05-03 17:09:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2064. [2021-05-03 17:09:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4755210857973826) internal successors, (7170), 2063 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7170 transitions. [2021-05-03 17:09:29,400 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7170 transitions. Word has length 28 [2021-05-03 17:09:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:29,400 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 7170 transitions. [2021-05-03 17:09:29,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7170 transitions. [2021-05-03 17:09:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:29,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:29,404 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:29,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:29,604 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 58 times [2021-05-03 17:09:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:29,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476227291] [2021-05-03 17:09:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:29,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476227291] [2021-05-03 17:09:29,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57344789] [2021-05-03 17:09:29,738 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 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 [2021-05-03 17:09:29,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:09:29,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:29,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:09:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:30,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:30,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:09:30,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017196580] [2021-05-03 17:09:30,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:09:30,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:09:30,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:09:30,120 INFO L87 Difference]: Start difference. First operand 2064 states and 7170 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:33,846 INFO L93 Difference]: Finished difference Result 6392 states and 19484 transitions. [2021-05-03 17:09:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 17:09:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:33,864 INFO L225 Difference]: With dead ends: 6392 [2021-05-03 17:09:33,864 INFO L226 Difference]: Without dead ends: 6392 [2021-05-03 17:09:33,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 2226.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 17:09:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2021-05-03 17:09:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 2078. [2021-05-03 17:09:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.4848338950409246) internal successors, (7238), 2077 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 7238 transitions. [2021-05-03 17:09:33,956 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 7238 transitions. Word has length 28 [2021-05-03 17:09:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:33,956 INFO L480 AbstractCegarLoop]: Abstraction has 2078 states and 7238 transitions. [2021-05-03 17:09:33,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 7238 transitions. [2021-05-03 17:09:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:33,960 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:33,960 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:34,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-05-03 17:09:34,160 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 59 times [2021-05-03 17:09:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:34,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108632622] [2021-05-03 17:09:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:34,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108632622] [2021-05-03 17:09:34,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669872968] [2021-05-03 17:09:34,292 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 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 [2021-05-03 17:09:34,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:09:34,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:34,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:09:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:34,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:34,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:09:34,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616849510] [2021-05-03 17:09:34,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:09:34,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:09:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:09:34,711 INFO L87 Difference]: Start difference. First operand 2078 states and 7238 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:38,677 INFO L93 Difference]: Finished difference Result 5781 states and 18006 transitions. [2021-05-03 17:09:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 17:09:38,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:38,694 INFO L225 Difference]: With dead ends: 5781 [2021-05-03 17:09:38,694 INFO L226 Difference]: Without dead ends: 5781 [2021-05-03 17:09:38,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 2431.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 17:09:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-05-03 17:09:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 2023. [2021-05-03 17:09:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.4579624134520275) internal successors, (6992), 2022 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6992 transitions. [2021-05-03 17:09:38,766 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6992 transitions. Word has length 28 [2021-05-03 17:09:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:38,766 INFO L480 AbstractCegarLoop]: Abstraction has 2023 states and 6992 transitions. [2021-05-03 17:09:38,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6992 transitions. [2021-05-03 17:09:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:38,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:38,770 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:38,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:38,971 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 60 times [2021-05-03 17:09:38,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:38,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294403497] [2021-05-03 17:09:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:39,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294403497] [2021-05-03 17:09:39,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643830165] [2021-05-03 17:09:39,119 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 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 [2021-05-03 17:09:39,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:09:39,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:09:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:39,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:39,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:09:39,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638169222] [2021-05-03 17:09:39,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:09:39,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:09:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:09:39,518 INFO L87 Difference]: Start difference. First operand 2023 states and 6992 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:43,051 INFO L93 Difference]: Finished difference Result 4893 states and 15049 transitions. [2021-05-03 17:09:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 17:09:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:43,063 INFO L225 Difference]: With dead ends: 4893 [2021-05-03 17:09:43,063 INFO L226 Difference]: Without dead ends: 4893 [2021-05-03 17:09:43,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2191.6ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 17:09:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-05-03 17:09:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 2033. [2021-05-03 17:09:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.453740157480315) internal successors, (7018), 2032 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7018 transitions. [2021-05-03 17:09:43,117 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7018 transitions. Word has length 28 [2021-05-03 17:09:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:43,117 INFO L480 AbstractCegarLoop]: Abstraction has 2033 states and 7018 transitions. [2021-05-03 17:09:43,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7018 transitions. [2021-05-03 17:09:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:43,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:43,121 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:43,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:43,337 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:43,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 66 times [2021-05-03 17:09:43,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:43,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632005033] [2021-05-03 17:09:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:43,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632005033] [2021-05-03 17:09:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377988092] [2021-05-03 17:09:43,453 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 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 [2021-05-03 17:09:43,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:09:43,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:09:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:43,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:43,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:09:43,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411996293] [2021-05-03 17:09:43,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:09:43,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:43,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:09:43,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:09:43,752 INFO L87 Difference]: Start difference. First operand 2033 states and 7018 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:45,895 INFO L93 Difference]: Finished difference Result 4312 states and 13444 transitions. [2021-05-03 17:09:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 17:09:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:45,906 INFO L225 Difference]: With dead ends: 4312 [2021-05-03 17:09:45,906 INFO L226 Difference]: Without dead ends: 4312 [2021-05-03 17:09:45,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1029.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:09:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-05-03 17:09:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2089. [2021-05-03 17:09:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.439176245210728) internal successors, (7181), 2088 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7181 transitions. [2021-05-03 17:09:45,963 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7181 transitions. Word has length 28 [2021-05-03 17:09:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:45,963 INFO L480 AbstractCegarLoop]: Abstraction has 2089 states and 7181 transitions. [2021-05-03 17:09:45,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7181 transitions. [2021-05-03 17:09:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:45,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:45,967 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:46,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:46,169 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 61 times [2021-05-03 17:09:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:46,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157072388] [2021-05-03 17:09:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:09:46,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157072388] [2021-05-03 17:09:46,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783359407] [2021-05-03 17:09:46,286 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 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 [2021-05-03 17:09:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:09:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:09:46,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:46,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:09:46,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503434497] [2021-05-03 17:09:46,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:09:46,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:09:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:09:46,545 INFO L87 Difference]: Start difference. First operand 2089 states and 7181 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:47,123 INFO L93 Difference]: Finished difference Result 3577 states and 11658 transitions. [2021-05-03 17:09:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:09:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:47,135 INFO L225 Difference]: With dead ends: 3577 [2021-05-03 17:09:47,135 INFO L226 Difference]: Without dead ends: 3553 [2021-05-03 17:09:47,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:09:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-05-03 17:09:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2470. [2021-05-03 17:09:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5107330903199676) internal successors, (8668), 2469 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8668 transitions. [2021-05-03 17:09:47,214 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8668 transitions. Word has length 28 [2021-05-03 17:09:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:47,214 INFO L480 AbstractCegarLoop]: Abstraction has 2470 states and 8668 transitions. [2021-05-03 17:09:47,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8668 transitions. [2021-05-03 17:09:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:47,218 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:47,219 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:47,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:47,419 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 62 times [2021-05-03 17:09:47,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:47,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478182636] [2021-05-03 17:09:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:47,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478182636] [2021-05-03 17:09:47,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133621461] [2021-05-03 17:09:47,535 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 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 [2021-05-03 17:09:47,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:09:47,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:09:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:47,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:47,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 17:09:47,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341549960] [2021-05-03 17:09:47,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:09:47,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:09:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:09:47,877 INFO L87 Difference]: Start difference. First operand 2470 states and 8668 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:50,082 INFO L93 Difference]: Finished difference Result 4198 states and 13424 transitions. [2021-05-03 17:09:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 17:09:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:50,101 INFO L225 Difference]: With dead ends: 4198 [2021-05-03 17:09:50,101 INFO L226 Difference]: Without dead ends: 4151 [2021-05-03 17:09:50,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1343.2ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 17:09:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-05-03 17:09:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 2635. [2021-05-03 17:09:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.5292331055429007) internal successors, (9296), 2634 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9296 transitions. [2021-05-03 17:09:50,173 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9296 transitions. Word has length 28 [2021-05-03 17:09:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:50,173 INFO L480 AbstractCegarLoop]: Abstraction has 2635 states and 9296 transitions. [2021-05-03 17:09:50,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9296 transitions. [2021-05-03 17:09:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:50,177 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:50,177 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:50,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-05-03 17:09:50,379 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:50,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 67 times [2021-05-03 17:09:50,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:50,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998085665] [2021-05-03 17:09:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:50,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998085665] [2021-05-03 17:09:50,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350169915] [2021-05-03 17:09:50,511 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 [2021-05-03 17:09:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:09:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:50,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:50,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 17:09:50,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087737257] [2021-05-03 17:09:50,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:09:50,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:50,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:09:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:09:50,870 INFO L87 Difference]: Start difference. First operand 2635 states and 9296 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:52,192 INFO L93 Difference]: Finished difference Result 5078 states and 16878 transitions. [2021-05-03 17:09:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:09:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:52,207 INFO L225 Difference]: With dead ends: 5078 [2021-05-03 17:09:52,208 INFO L226 Difference]: Without dead ends: 4991 [2021-05-03 17:09:52,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1037.3ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:09:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-05-03 17:09:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3295. [2021-05-03 17:09:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.5491803278688523) internal successors, (11691), 3294 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11691 transitions. [2021-05-03 17:09:52,293 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11691 transitions. Word has length 28 [2021-05-03 17:09:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:52,293 INFO L480 AbstractCegarLoop]: Abstraction has 3295 states and 11691 transitions. [2021-05-03 17:09:52,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11691 transitions. [2021-05-03 17:09:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:52,300 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:52,300 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:52,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-05-03 17:09:52,509 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 63 times [2021-05-03 17:09:52,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:52,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474598662] [2021-05-03 17:09:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:52,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474598662] [2021-05-03 17:09:52,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543566219] [2021-05-03 17:09:52,623 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 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 [2021-05-03 17:09:52,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:09:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:09:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:52,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:52,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 17:09:52,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656163237] [2021-05-03 17:09:52,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:09:52,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:52,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:09:52,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:09:52,999 INFO L87 Difference]: Start difference. First operand 3295 states and 11691 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:55,308 INFO L93 Difference]: Finished difference Result 5501 states and 17502 transitions. [2021-05-03 17:09:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 17:09:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:55,319 INFO L225 Difference]: With dead ends: 5501 [2021-05-03 17:09:55,319 INFO L226 Difference]: Without dead ends: 5475 [2021-05-03 17:09:55,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1471.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 17:09:55,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2021-05-03 17:09:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 3313. [2021-05-03 17:09:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 3.5543478260869565) internal successors, (11772), 3312 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 11772 transitions. [2021-05-03 17:09:55,377 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 11772 transitions. Word has length 28 [2021-05-03 17:09:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:55,377 INFO L480 AbstractCegarLoop]: Abstraction has 3313 states and 11772 transitions. [2021-05-03 17:09:55,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 11772 transitions. [2021-05-03 17:09:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:55,381 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:55,381 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:55,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:55,582 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 64 times [2021-05-03 17:09:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:55,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386033028] [2021-05-03 17:09:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:55,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386033028] [2021-05-03 17:09:55,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93638341] [2021-05-03 17:09:55,704 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 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 [2021-05-03 17:09:55,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:09:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:09:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:56,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:56,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 17:09:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565693826] [2021-05-03 17:09:56,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:09:56,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:09:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:09:56,119 INFO L87 Difference]: Start difference. First operand 3313 states and 11772 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:58,818 INFO L93 Difference]: Finished difference Result 5556 states and 17694 transitions. [2021-05-03 17:09:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 17:09:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:09:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:58,835 INFO L225 Difference]: With dead ends: 5556 [2021-05-03 17:09:58,836 INFO L226 Difference]: Without dead ends: 5525 [2021-05-03 17:09:58,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1600.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 17:09:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-05-03 17:09:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 3306. [2021-05-03 17:09:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.5606656580937974) internal successors, (11768), 3305 states have internal predecessors, (11768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11768 transitions. [2021-05-03 17:09:58,933 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11768 transitions. Word has length 28 [2021-05-03 17:09:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:58,933 INFO L480 AbstractCegarLoop]: Abstraction has 3306 states and 11768 transitions. [2021-05-03 17:09:58,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11768 transitions. [2021-05-03 17:09:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:09:58,940 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:58,940 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:59,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-05-03 17:09:59,158 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 65 times [2021-05-03 17:09:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:59,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88422800] [2021-05-03 17:09:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88422800] [2021-05-03 17:09:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712047386] [2021-05-03 17:09:59,278 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 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 [2021-05-03 17:09:59,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:09:59,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:09:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:59,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:59,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:09:59,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45244896] [2021-05-03 17:09:59,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:09:59,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:09:59,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:09:59,616 INFO L87 Difference]: Start difference. First operand 3306 states and 11768 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:01,608 INFO L93 Difference]: Finished difference Result 6732 states and 21804 transitions. [2021-05-03 17:10:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 17:10:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:01,630 INFO L225 Difference]: With dead ends: 6732 [2021-05-03 17:10:01,630 INFO L226 Difference]: Without dead ends: 6685 [2021-05-03 17:10:01,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1191.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:10:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-05-03 17:10:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 3469. [2021-05-03 17:10:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 3.605824682814302) internal successors, (12505), 3468 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 12505 transitions. [2021-05-03 17:10:01,751 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 12505 transitions. Word has length 28 [2021-05-03 17:10:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:01,751 INFO L480 AbstractCegarLoop]: Abstraction has 3469 states and 12505 transitions. [2021-05-03 17:10:01,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 12505 transitions. [2021-05-03 17:10:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:01,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:01,759 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:01,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-05-03 17:10:01,977 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 66 times [2021-05-03 17:10:01,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:01,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716101915] [2021-05-03 17:10:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:10:02,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716101915] [2021-05-03 17:10:02,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344367430] [2021-05-03 17:10:02,061 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 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 [2021-05-03 17:10:02,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:10:02,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:02,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:10:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:10:02,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:02,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:10:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875342611] [2021-05-03 17:10:02,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:10:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:10:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:10:02,388 INFO L87 Difference]: Start difference. First operand 3469 states and 12505 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:02,993 INFO L93 Difference]: Finished difference Result 5136 states and 17042 transitions. [2021-05-03 17:10:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:10:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:03,009 INFO L225 Difference]: With dead ends: 5136 [2021-05-03 17:10:03,009 INFO L226 Difference]: Without dead ends: 5136 [2021-05-03 17:10:03,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:10:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-05-03 17:10:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 3266. [2021-05-03 17:10:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 3.559571209800919) internal successors, (11622), 3265 states have internal predecessors, (11622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 11622 transitions. [2021-05-03 17:10:03,115 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 11622 transitions. Word has length 28 [2021-05-03 17:10:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:03,115 INFO L480 AbstractCegarLoop]: Abstraction has 3266 states and 11622 transitions. [2021-05-03 17:10:03,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 11622 transitions. [2021-05-03 17:10:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:03,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:03,123 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:03,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-05-03 17:10:03,342 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 67 times [2021-05-03 17:10:03,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:03,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438651898] [2021-05-03 17:10:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:03,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438651898] [2021-05-03 17:10:03,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694139455] [2021-05-03 17:10:03,468 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 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 [2021-05-03 17:10:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:03,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:03,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:10:03,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218695458] [2021-05-03 17:10:03,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:10:03,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:03,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:10:03,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:10:03,846 INFO L87 Difference]: Start difference. First operand 3266 states and 11622 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:06,375 INFO L93 Difference]: Finished difference Result 7168 states and 22913 transitions. [2021-05-03 17:10:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 17:10:06,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:06,400 INFO L225 Difference]: With dead ends: 7168 [2021-05-03 17:10:06,401 INFO L226 Difference]: Without dead ends: 7168 [2021-05-03 17:10:06,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1547.0ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 17:10:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-05-03 17:10:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3296. [2021-05-03 17:10:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3295 states have (on average 3.559028831562974) internal successors, (11727), 3295 states have internal predecessors, (11727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 11727 transitions. [2021-05-03 17:10:06,548 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 11727 transitions. Word has length 28 [2021-05-03 17:10:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:06,548 INFO L480 AbstractCegarLoop]: Abstraction has 3296 states and 11727 transitions. [2021-05-03 17:10:06,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 11727 transitions. [2021-05-03 17:10:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:06,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:06,555 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:06,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:06,756 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 68 times [2021-05-03 17:10:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736237379] [2021-05-03 17:10:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:06,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736237379] [2021-05-03 17:10:06,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542625109] [2021-05-03 17:10:06,912 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 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 [2021-05-03 17:10:06,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:10:06,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:06,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:07,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:07,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:10:07,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6603316] [2021-05-03 17:10:07,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:10:07,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:10:07,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:10:07,261 INFO L87 Difference]: Start difference. First operand 3296 states and 11727 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:10,412 INFO L93 Difference]: Finished difference Result 7462 states and 23886 transitions. [2021-05-03 17:10:10,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 17:10:10,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:10,433 INFO L225 Difference]: With dead ends: 7462 [2021-05-03 17:10:10,434 INFO L226 Difference]: Without dead ends: 7462 [2021-05-03 17:10:10,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1730.2ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 17:10:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2021-05-03 17:10:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 3426. [2021-05-03 17:10:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 3.542773722627737) internal successors, (12134), 3425 states have internal predecessors, (12134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 12134 transitions. [2021-05-03 17:10:10,548 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 12134 transitions. Word has length 28 [2021-05-03 17:10:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:10,548 INFO L480 AbstractCegarLoop]: Abstraction has 3426 states and 12134 transitions. [2021-05-03 17:10:10,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 12134 transitions. [2021-05-03 17:10:10,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:10,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:10,555 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:10,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:10,774 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:10,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 69 times [2021-05-03 17:10:10,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:10,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49684468] [2021-05-03 17:10:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:10,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49684468] [2021-05-03 17:10:10,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495648691] [2021-05-03 17:10:10,912 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:10:10,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:10:10,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:10,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:10:10,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:11,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:11,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:10:11,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072028883] [2021-05-03 17:10:11,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:10:11,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:11,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:10:11,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:10:11,284 INFO L87 Difference]: Start difference. First operand 3426 states and 12134 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:13,741 INFO L93 Difference]: Finished difference Result 7933 states and 25424 transitions. [2021-05-03 17:10:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 17:10:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:13,768 INFO L225 Difference]: With dead ends: 7933 [2021-05-03 17:10:13,768 INFO L226 Difference]: Without dead ends: 7920 [2021-05-03 17:10:13,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1420.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:10:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-05-03 17:10:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 4071. [2021-05-03 17:10:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4071 states, 4070 states have (on average 3.5847665847665846) internal successors, (14590), 4070 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4071 states to 4071 states and 14590 transitions. [2021-05-03 17:10:13,914 INFO L78 Accepts]: Start accepts. Automaton has 4071 states and 14590 transitions. Word has length 28 [2021-05-03 17:10:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:13,914 INFO L480 AbstractCegarLoop]: Abstraction has 4071 states and 14590 transitions. [2021-05-03 17:10:13,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4071 states and 14590 transitions. [2021-05-03 17:10:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:13,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:13,923 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:14,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:14,124 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:14,124 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 70 times [2021-05-03 17:10:14,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:14,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069486238] [2021-05-03 17:10:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:14,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069486238] [2021-05-03 17:10:14,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573767945] [2021-05-03 17:10:14,216 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 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 [2021-05-03 17:10:14,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:10:14,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:14,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:10:14,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:14,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:14,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:10:14,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277712030] [2021-05-03 17:10:14,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:10:14,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:14,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:10:14,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:10:14,592 INFO L87 Difference]: Start difference. First operand 4071 states and 14590 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:16,355 INFO L93 Difference]: Finished difference Result 8195 states and 26154 transitions. [2021-05-03 17:10:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 17:10:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:16,376 INFO L225 Difference]: With dead ends: 8195 [2021-05-03 17:10:16,376 INFO L226 Difference]: Without dead ends: 8195 [2021-05-03 17:10:16,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1169.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:10:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8195 states. [2021-05-03 17:10:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8195 to 3824. [2021-05-03 17:10:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3823 states have (on average 3.550353125817421) internal successors, (13573), 3823 states have internal predecessors, (13573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 13573 transitions. [2021-05-03 17:10:16,500 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 13573 transitions. Word has length 28 [2021-05-03 17:10:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:16,500 INFO L480 AbstractCegarLoop]: Abstraction has 3824 states and 13573 transitions. [2021-05-03 17:10:16,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 13573 transitions. [2021-05-03 17:10:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:16,507 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:16,507 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:16,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable373 [2021-05-03 17:10:16,722 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 71 times [2021-05-03 17:10:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:16,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515704738] [2021-05-03 17:10:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:16,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515704738] [2021-05-03 17:10:16,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391841157] [2021-05-03 17:10:16,824 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 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 [2021-05-03 17:10:16,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 17:10:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:17,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:17,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:10:17,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647039186] [2021-05-03 17:10:17,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:10:17,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:10:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:10:17,066 INFO L87 Difference]: Start difference. First operand 3824 states and 13573 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:19,758 INFO L93 Difference]: Finished difference Result 7301 states and 23970 transitions. [2021-05-03 17:10:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 17:10:19,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:19,781 INFO L225 Difference]: With dead ends: 7301 [2021-05-03 17:10:19,781 INFO L226 Difference]: Without dead ends: 7297 [2021-05-03 17:10:19,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1499.4ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 17:10:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2021-05-03 17:10:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 3457. [2021-05-03 17:10:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3457 states, 3456 states have (on average 3.595775462962963) internal successors, (12427), 3456 states have internal predecessors, (12427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3457 states to 3457 states and 12427 transitions. [2021-05-03 17:10:19,903 INFO L78 Accepts]: Start accepts. Automaton has 3457 states and 12427 transitions. Word has length 28 [2021-05-03 17:10:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:19,903 INFO L480 AbstractCegarLoop]: Abstraction has 3457 states and 12427 transitions. [2021-05-03 17:10:19,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3457 states and 12427 transitions. [2021-05-03 17:10:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:19,910 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:19,910 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:20,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:20,111 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 72 times [2021-05-03 17:10:20,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:20,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200856207] [2021-05-03 17:10:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:20,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200856207] [2021-05-03 17:10:20,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823260247] [2021-05-03 17:10:20,233 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 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 [2021-05-03 17:10:20,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:10:20,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:20,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:20,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 17:10:20,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53919440] [2021-05-03 17:10:20,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:10:20,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:10:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:10:20,689 INFO L87 Difference]: Start difference. First operand 3457 states and 12427 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:24,595 INFO L93 Difference]: Finished difference Result 11600 states and 38331 transitions. [2021-05-03 17:10:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 17:10:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:24,634 INFO L225 Difference]: With dead ends: 11600 [2021-05-03 17:10:24,634 INFO L226 Difference]: Without dead ends: 11600 [2021-05-03 17:10:24,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2388.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 17:10:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2021-05-03 17:10:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 3751. [2021-05-03 17:10:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 3.6784) internal successors, (13794), 3750 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 13794 transitions. [2021-05-03 17:10:24,829 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 13794 transitions. Word has length 28 [2021-05-03 17:10:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:24,829 INFO L480 AbstractCegarLoop]: Abstraction has 3751 states and 13794 transitions. [2021-05-03 17:10:24,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 13794 transitions. [2021-05-03 17:10:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:24,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:24,837 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:25,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-05-03 17:10:25,053 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 73 times [2021-05-03 17:10:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:25,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806797122] [2021-05-03 17:10:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:25,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806797122] [2021-05-03 17:10:25,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360140354] [2021-05-03 17:10:25,232 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 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 [2021-05-03 17:10:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:25,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:25,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 17:10:25,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720161236] [2021-05-03 17:10:25,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:10:25,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:10:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:10:25,709 INFO L87 Difference]: Start difference. First operand 3751 states and 13794 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:30,020 INFO L93 Difference]: Finished difference Result 11294 states and 37514 transitions. [2021-05-03 17:10:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 17:10:30,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:30,057 INFO L225 Difference]: With dead ends: 11294 [2021-05-03 17:10:30,057 INFO L226 Difference]: Without dead ends: 11294 [2021-05-03 17:10:30,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 2506.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 17:10:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11294 states. [2021-05-03 17:10:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11294 to 3699. [2021-05-03 17:10:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.657382368848026) internal successors, (13525), 3698 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 13525 transitions. [2021-05-03 17:10:30,237 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 13525 transitions. Word has length 28 [2021-05-03 17:10:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:30,238 INFO L480 AbstractCegarLoop]: Abstraction has 3699 states and 13525 transitions. [2021-05-03 17:10:30,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 13525 transitions. [2021-05-03 17:10:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:30,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:30,246 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:30,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:30,461 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 74 times [2021-05-03 17:10:30,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:30,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417056108] [2021-05-03 17:10:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417056108] [2021-05-03 17:10:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519893989] [2021-05-03 17:10:30,583 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 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 [2021-05-03 17:10:30,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:10:30,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:30,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:30,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:30,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 17:10:30,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506417007] [2021-05-03 17:10:30,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:10:30,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:10:30,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:10:30,976 INFO L87 Difference]: Start difference. First operand 3699 states and 13525 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:34,113 INFO L93 Difference]: Finished difference Result 10614 states and 34080 transitions. [2021-05-03 17:10:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 17:10:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:34,145 INFO L225 Difference]: With dead ends: 10614 [2021-05-03 17:10:34,146 INFO L226 Difference]: Without dead ends: 10614 [2021-05-03 17:10:34,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 1766.2ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 17:10:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2021-05-03 17:10:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 3739. [2021-05-03 17:10:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 3.6615837346174427) internal successors, (13687), 3738 states have internal predecessors, (13687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 13687 transitions. [2021-05-03 17:10:34,307 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 13687 transitions. Word has length 28 [2021-05-03 17:10:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:34,307 INFO L480 AbstractCegarLoop]: Abstraction has 3739 states and 13687 transitions. [2021-05-03 17:10:34,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 13687 transitions. [2021-05-03 17:10:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:34,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:34,315 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:34,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-05-03 17:10:34,525 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 75 times [2021-05-03 17:10:34,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:34,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815490308] [2021-05-03 17:10:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:34,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815490308] [2021-05-03 17:10:34,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850890625] [2021-05-03 17:10:34,718 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 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 [2021-05-03 17:10:34,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 17:10:34,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:34,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:34,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:35,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:35,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 17:10:35,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829933401] [2021-05-03 17:10:35,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:10:35,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:10:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:10:35,137 INFO L87 Difference]: Start difference. First operand 3739 states and 13687 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:38,948 INFO L93 Difference]: Finished difference Result 10000 states and 32572 transitions. [2021-05-03 17:10:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 17:10:38,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:38,989 INFO L225 Difference]: With dead ends: 10000 [2021-05-03 17:10:38,990 INFO L226 Difference]: Without dead ends: 9992 [2021-05-03 17:10:38,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2145.6ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 17:10:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2021-05-03 17:10:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 3705. [2021-05-03 17:10:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3704 states have (on average 3.6565874730021597) internal successors, (13544), 3704 states have internal predecessors, (13544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 13544 transitions. [2021-05-03 17:10:39,168 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 13544 transitions. Word has length 28 [2021-05-03 17:10:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:39,168 INFO L480 AbstractCegarLoop]: Abstraction has 3705 states and 13544 transitions. [2021-05-03 17:10:39,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 13544 transitions. [2021-05-03 17:10:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:39,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:39,176 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:39,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-05-03 17:10:39,377 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 76 times [2021-05-03 17:10:39,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:39,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673898199] [2021-05-03 17:10:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:39,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673898199] [2021-05-03 17:10:39,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904535455] [2021-05-03 17:10:39,510 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 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 [2021-05-03 17:10:39,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:10:39,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:40,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:40,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 17:10:40,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323686632] [2021-05-03 17:10:40,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:10:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:10:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:10:40,011 INFO L87 Difference]: Start difference. First operand 3705 states and 13544 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:43,861 INFO L93 Difference]: Finished difference Result 9602 states and 31462 transitions. [2021-05-03 17:10:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 17:10:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:43,886 INFO L225 Difference]: With dead ends: 9602 [2021-05-03 17:10:43,886 INFO L226 Difference]: Without dead ends: 9602 [2021-05-03 17:10:43,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 2306.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 17:10:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9602 states. [2021-05-03 17:10:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9602 to 3721. [2021-05-03 17:10:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 3.6580645161290324) internal successors, (13608), 3720 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 13608 transitions. [2021-05-03 17:10:44,037 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 13608 transitions. Word has length 28 [2021-05-03 17:10:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:44,037 INFO L480 AbstractCegarLoop]: Abstraction has 3721 states and 13608 transitions. [2021-05-03 17:10:44,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 13608 transitions. [2021-05-03 17:10:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:44,043 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:44,043 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:44,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:44,244 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 77 times [2021-05-03 17:10:44,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:44,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841718512] [2021-05-03 17:10:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:44,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841718512] [2021-05-03 17:10:44,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353360459] [2021-05-03 17:10:44,358 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 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 [2021-05-03 17:10:44,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:10:44,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:44,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:44,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:44,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 17:10:44,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493693010] [2021-05-03 17:10:44,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:10:44,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:10:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:10:44,773 INFO L87 Difference]: Start difference. First operand 3721 states and 13608 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:48,333 INFO L93 Difference]: Finished difference Result 9267 states and 30667 transitions. [2021-05-03 17:10:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 17:10:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:48,364 INFO L225 Difference]: With dead ends: 9267 [2021-05-03 17:10:48,364 INFO L226 Difference]: Without dead ends: 9259 [2021-05-03 17:10:48,364 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2019.8ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 17:10:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9259 states. [2021-05-03 17:10:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9259 to 3389. [2021-05-03 17:10:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3388 states have (on average 3.5714285714285716) internal successors, (12100), 3388 states have internal predecessors, (12100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 12100 transitions. [2021-05-03 17:10:48,543 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 12100 transitions. Word has length 28 [2021-05-03 17:10:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:48,543 INFO L480 AbstractCegarLoop]: Abstraction has 3389 states and 12100 transitions. [2021-05-03 17:10:48,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 12100 transitions. [2021-05-03 17:10:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:48,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:48,554 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:48,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-05-03 17:10:48,761 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 78 times [2021-05-03 17:10:48,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:48,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657123865] [2021-05-03 17:10:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:48,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657123865] [2021-05-03 17:10:48,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333421776] [2021-05-03 17:10:48,897 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 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 [2021-05-03 17:10:48,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 17:10:48,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:49,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:49,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 17:10:49,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737416917] [2021-05-03 17:10:49,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:10:49,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:10:49,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:10:49,439 INFO L87 Difference]: Start difference. First operand 3389 states and 12100 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:52,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:52,815 INFO L93 Difference]: Finished difference Result 7033 states and 23007 transitions. [2021-05-03 17:10:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 17:10:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:52,835 INFO L225 Difference]: With dead ends: 7033 [2021-05-03 17:10:52,835 INFO L226 Difference]: Without dead ends: 7033 [2021-05-03 17:10:52,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2064.6ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 17:10:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2021-05-03 17:10:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 3401. [2021-05-03 17:10:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 3.57) internal successors, (12138), 3400 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 12138 transitions. [2021-05-03 17:10:52,944 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 12138 transitions. Word has length 28 [2021-05-03 17:10:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:52,944 INFO L480 AbstractCegarLoop]: Abstraction has 3401 states and 12138 transitions. [2021-05-03 17:10:52,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 12138 transitions. [2021-05-03 17:10:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:52,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:52,951 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:53,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:53,151 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 79 times [2021-05-03 17:10:53,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:53,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733975295] [2021-05-03 17:10:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:53,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733975295] [2021-05-03 17:10:53,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37413100] [2021-05-03 17:10:53,216 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 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 [2021-05-03 17:10:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:53,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:53,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:53,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:10:53,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735191792] [2021-05-03 17:10:53,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:10:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:10:53,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:10:53,553 INFO L87 Difference]: Start difference. First operand 3401 states and 12138 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:57,588 INFO L93 Difference]: Finished difference Result 7961 states and 25396 transitions. [2021-05-03 17:10:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 17:10:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:10:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:57,610 INFO L225 Difference]: With dead ends: 7961 [2021-05-03 17:10:57,611 INFO L226 Difference]: Without dead ends: 7961 [2021-05-03 17:10:57,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 2477.0ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 17:10:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-05-03 17:10:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 3467. [2021-05-03 17:10:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 3.5646278130409694) internal successors, (12355), 3466 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 12355 transitions. [2021-05-03 17:10:57,730 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 12355 transitions. Word has length 28 [2021-05-03 17:10:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:57,730 INFO L480 AbstractCegarLoop]: Abstraction has 3467 states and 12355 transitions. [2021-05-03 17:10:57,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 12355 transitions. [2021-05-03 17:10:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:10:57,736 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:57,736 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:57,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:57,937 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 80 times [2021-05-03 17:10:57,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:57,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018092457] [2021-05-03 17:10:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:58,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018092457] [2021-05-03 17:10:58,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130460245] [2021-05-03 17:10:58,071 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:58,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:10:58,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:58,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:10:58,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:58,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:58,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:10:58,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989277159] [2021-05-03 17:10:58,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:10:58,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:58,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:10:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:10:58,509 INFO L87 Difference]: Start difference. First operand 3467 states and 12355 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:02,162 INFO L93 Difference]: Finished difference Result 7344 states and 23768 transitions. [2021-05-03 17:11:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 17:11:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:02,185 INFO L225 Difference]: With dead ends: 7344 [2021-05-03 17:11:02,185 INFO L226 Difference]: Without dead ends: 7340 [2021-05-03 17:11:02,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 2345.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 17:11:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2021-05-03 17:11:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 3402. [2021-05-03 17:11:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5624816230520433) internal successors, (12116), 3401 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12116 transitions. [2021-05-03 17:11:02,303 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12116 transitions. Word has length 28 [2021-05-03 17:11:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:02,303 INFO L480 AbstractCegarLoop]: Abstraction has 3402 states and 12116 transitions. [2021-05-03 17:11:02,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12116 transitions. [2021-05-03 17:11:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:02,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:02,310 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:02,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:02,511 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:02,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 68 times [2021-05-03 17:11:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862501795] [2021-05-03 17:11:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:02,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862501795] [2021-05-03 17:11:02,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824157581] [2021-05-03 17:11:02,684 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 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 [2021-05-03 17:11:02,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:11:02,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:03,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:03,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:11:03,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830432022] [2021-05-03 17:11:03,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:11:03,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:03,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:11:03,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:11:03,030 INFO L87 Difference]: Start difference. First operand 3402 states and 12116 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:05,112 INFO L93 Difference]: Finished difference Result 6487 states and 21356 transitions. [2021-05-03 17:11:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 17:11:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:05,127 INFO L225 Difference]: With dead ends: 6487 [2021-05-03 17:11:05,127 INFO L226 Difference]: Without dead ends: 6487 [2021-05-03 17:11:05,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1214.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:11:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states. [2021-05-03 17:11:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6487 to 3406. [2021-05-03 17:11:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 3.5641703377386196) internal successors, (12136), 3405 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 12136 transitions. [2021-05-03 17:11:05,223 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 12136 transitions. Word has length 28 [2021-05-03 17:11:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:05,223 INFO L480 AbstractCegarLoop]: Abstraction has 3406 states and 12136 transitions. [2021-05-03 17:11:05,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 12136 transitions. [2021-05-03 17:11:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:05,230 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:05,230 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:05,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:05,431 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:05,431 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 69 times [2021-05-03 17:11:05,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:05,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867178904] [2021-05-03 17:11:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:05,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867178904] [2021-05-03 17:11:05,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192049064] [2021-05-03 17:11:05,593 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 [2021-05-03 17:11:05,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:11:05,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:05,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:06,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:06,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:11:06,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736242954] [2021-05-03 17:11:06,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:11:06,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:06,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:11:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:11:06,061 INFO L87 Difference]: Start difference. First operand 3406 states and 12136 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:09,070 INFO L93 Difference]: Finished difference Result 6961 states and 22678 transitions. [2021-05-03 17:11:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 17:11:09,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:09,091 INFO L225 Difference]: With dead ends: 6961 [2021-05-03 17:11:09,092 INFO L226 Difference]: Without dead ends: 6961 [2021-05-03 17:11:09,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1761.9ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 17:11:09,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-05-03 17:11:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 3420. [2021-05-03 17:11:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.5615677098566834) internal successors, (12177), 3419 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 12177 transitions. [2021-05-03 17:11:09,226 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 12177 transitions. Word has length 28 [2021-05-03 17:11:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:09,226 INFO L480 AbstractCegarLoop]: Abstraction has 3420 states and 12177 transitions. [2021-05-03 17:11:09,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 12177 transitions. [2021-05-03 17:11:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:09,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:09,232 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:09,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-05-03 17:11:09,433 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 70 times [2021-05-03 17:11:09,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:09,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757180394] [2021-05-03 17:11:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:09,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757180394] [2021-05-03 17:11:09,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401344729] [2021-05-03 17:11:09,598 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 [2021-05-03 17:11:09,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:11:09,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:09,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:09,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:09,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:09,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:11:09,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154235339] [2021-05-03 17:11:09,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:11:09,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:09,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:11:09,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:11:09,978 INFO L87 Difference]: Start difference. First operand 3420 states and 12177 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:12,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:12,731 INFO L93 Difference]: Finished difference Result 7467 states and 24110 transitions. [2021-05-03 17:11:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 17:11:12,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:12,747 INFO L225 Difference]: With dead ends: 7467 [2021-05-03 17:11:12,747 INFO L226 Difference]: Without dead ends: 7467 [2021-05-03 17:11:12,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1722.1ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 17:11:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7467 states. [2021-05-03 17:11:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7467 to 3500. [2021-05-03 17:11:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 3499 states have (on average 3.5550157187767932) internal successors, (12439), 3499 states have internal predecessors, (12439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 12439 transitions. [2021-05-03 17:11:12,855 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 12439 transitions. Word has length 28 [2021-05-03 17:11:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:12,855 INFO L480 AbstractCegarLoop]: Abstraction has 3500 states and 12439 transitions. [2021-05-03 17:11:12,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 12439 transitions. [2021-05-03 17:11:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:12,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:12,861 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:13,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-05-03 17:11:13,065 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 71 times [2021-05-03 17:11:13,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:13,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317562180] [2021-05-03 17:11:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:13,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317562180] [2021-05-03 17:11:13,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720023244] [2021-05-03 17:11:13,211 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 [2021-05-03 17:11:13,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 17:11:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:13,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:13,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 17:11:13,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959053048] [2021-05-03 17:11:13,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:11:13,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:11:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:11:13,684 INFO L87 Difference]: Start difference. First operand 3500 states and 12439 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:15,845 INFO L93 Difference]: Finished difference Result 7330 states and 25046 transitions. [2021-05-03 17:11:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 17:11:15,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:15,867 INFO L225 Difference]: With dead ends: 7330 [2021-05-03 17:11:15,867 INFO L226 Difference]: Without dead ends: 7330 [2021-05-03 17:11:15,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1500.6ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:11:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-05-03 17:11:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4678. [2021-05-03 17:11:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 3.6730810348514003) internal successors, (17179), 4677 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 17179 transitions. [2021-05-03 17:11:15,995 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 17179 transitions. Word has length 28 [2021-05-03 17:11:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:15,996 INFO L480 AbstractCegarLoop]: Abstraction has 4678 states and 17179 transitions. [2021-05-03 17:11:15,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 17179 transitions. [2021-05-03 17:11:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:16,005 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:16,005 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:16,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-05-03 17:11:16,223 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 72 times [2021-05-03 17:11:16,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:16,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037313840] [2021-05-03 17:11:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:16,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037313840] [2021-05-03 17:11:16,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642484951] [2021-05-03 17:11:16,387 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 [2021-05-03 17:11:16,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:11:16,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:16,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:16,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:16,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:16,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:11:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204914953] [2021-05-03 17:11:16,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:11:16,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:11:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:11:16,733 INFO L87 Difference]: Start difference. First operand 4678 states and 17179 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:19,696 INFO L93 Difference]: Finished difference Result 8463 states and 28955 transitions. [2021-05-03 17:11:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 17:11:19,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:19,721 INFO L225 Difference]: With dead ends: 8463 [2021-05-03 17:11:19,721 INFO L226 Difference]: Without dead ends: 8459 [2021-05-03 17:11:19,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1745.3ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 17:11:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8459 states. [2021-05-03 17:11:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8459 to 4570. [2021-05-03 17:11:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 3.683738235937842) internal successors, (16831), 4569 states have internal predecessors, (16831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 16831 transitions. [2021-05-03 17:11:19,860 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 16831 transitions. Word has length 28 [2021-05-03 17:11:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:19,860 INFO L480 AbstractCegarLoop]: Abstraction has 4570 states and 16831 transitions. [2021-05-03 17:11:19,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 16831 transitions. [2021-05-03 17:11:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:19,867 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:19,867 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:20,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-05-03 17:11:20,076 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 81 times [2021-05-03 17:11:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:20,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654207939] [2021-05-03 17:11:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:20,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654207939] [2021-05-03 17:11:20,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092847690] [2021-05-03 17:11:20,181 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 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 [2021-05-03 17:11:20,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:11:20,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:11:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:20,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:20,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 17:11:20,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826912925] [2021-05-03 17:11:20,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:11:20,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:20,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:11:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:11:20,576 INFO L87 Difference]: Start difference. First operand 4570 states and 16831 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:23,744 INFO L93 Difference]: Finished difference Result 9645 states and 32628 transitions. [2021-05-03 17:11:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:11:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:23,773 INFO L225 Difference]: With dead ends: 9645 [2021-05-03 17:11:23,773 INFO L226 Difference]: Without dead ends: 9633 [2021-05-03 17:11:23,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1820.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:11:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9633 states. [2021-05-03 17:11:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9633 to 5049. [2021-05-03 17:11:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 3.7652535657686212) internal successors, (19007), 5048 states have internal predecessors, (19007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 19007 transitions. [2021-05-03 17:11:23,940 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 19007 transitions. Word has length 28 [2021-05-03 17:11:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:23,940 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 19007 transitions. [2021-05-03 17:11:23,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 19007 transitions. [2021-05-03 17:11:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:23,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:23,950 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:24,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-05-03 17:11:24,168 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:24,168 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 82 times [2021-05-03 17:11:24,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:24,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072756710] [2021-05-03 17:11:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:24,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072756710] [2021-05-03 17:11:24,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69866256] [2021-05-03 17:11:24,306 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 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 [2021-05-03 17:11:24,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:11:24,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:11:24,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:24,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:24,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 17:11:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897898705] [2021-05-03 17:11:24,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:11:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:11:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:11:24,768 INFO L87 Difference]: Start difference. First operand 5049 states and 19007 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:27,619 INFO L93 Difference]: Finished difference Result 9975 states and 33666 transitions. [2021-05-03 17:11:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:11:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:27,645 INFO L225 Difference]: With dead ends: 9975 [2021-05-03 17:11:27,645 INFO L226 Difference]: Without dead ends: 9975 [2021-05-03 17:11:27,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1709.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:11:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9975 states. [2021-05-03 17:11:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9975 to 5068. [2021-05-03 17:11:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5068 states, 5067 states have (on average 3.7499506611407143) internal successors, (19001), 5067 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 19001 transitions. [2021-05-03 17:11:27,822 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 19001 transitions. Word has length 28 [2021-05-03 17:11:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:27,822 INFO L480 AbstractCegarLoop]: Abstraction has 5068 states and 19001 transitions. [2021-05-03 17:11:27,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 19001 transitions. [2021-05-03 17:11:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:27,833 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:27,833 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:28,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-05-03 17:11:28,033 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 83 times [2021-05-03 17:11:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:28,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919057082] [2021-05-03 17:11:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:28,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919057082] [2021-05-03 17:11:28,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943706036] [2021-05-03 17:11:28,167 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 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 [2021-05-03 17:11:28,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:11:28,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:11:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:28,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:28,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:11:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694720630] [2021-05-03 17:11:28,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:11:28,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:28,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:11:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:11:28,541 INFO L87 Difference]: Start difference. First operand 5068 states and 19001 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:11:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:30,447 INFO L93 Difference]: Finished difference Result 9405 states and 33542 transitions. [2021-05-03 17:11:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:11:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:11:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:30,479 INFO L225 Difference]: With dead ends: 9405 [2021-05-03 17:11:30,480 INFO L226 Difference]: Without dead ends: 9322 [2021-05-03 17:11:30,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1036.8ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:11:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9322 states. [2021-05-03 17:11:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9322 to 6492. [2021-05-03 17:11:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6492 states, 6491 states have (on average 3.795717146818672) internal successors, (24638), 6491 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6492 states to 6492 states and 24638 transitions. [2021-05-03 17:11:30,696 INFO L78 Accepts]: Start accepts. Automaton has 6492 states and 24638 transitions. Word has length 28 [2021-05-03 17:11:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:30,696 INFO L480 AbstractCegarLoop]: Abstraction has 6492 states and 24638 transitions. [2021-05-03 17:11:30,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:11:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6492 states and 24638 transitions. [2021-05-03 17:11:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:30,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:30,711 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:30,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:30,911 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 84 times [2021-05-03 17:11:30,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:30,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022144716] [2021-05-03 17:11:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:11:30,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022144716] [2021-05-03 17:11:30,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223433311] [2021-05-03 17:11:30,992 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 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 [2021-05-03 17:11:31,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:11:31,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:11:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:11:31,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:31,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 17:11:31,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311031933] [2021-05-03 17:11:31,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:11:31,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:11:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:11:31,322 INFO L87 Difference]: Start difference. First operand 6492 states and 24638 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:31,986 INFO L93 Difference]: Finished difference Result 8975 states and 31868 transitions. [2021-05-03 17:11:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:11:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:32,014 INFO L225 Difference]: With dead ends: 8975 [2021-05-03 17:11:32,014 INFO L226 Difference]: Without dead ends: 8975 [2021-05-03 17:11:32,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 463.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:11:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-05-03 17:11:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 6570. [2021-05-03 17:11:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.777896179022682) internal successors, (24817), 6569 states have internal predecessors, (24817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 24817 transitions. [2021-05-03 17:11:32,220 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 24817 transitions. Word has length 28 [2021-05-03 17:11:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:32,220 INFO L480 AbstractCegarLoop]: Abstraction has 6570 states and 24817 transitions. [2021-05-03 17:11:32,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 24817 transitions. [2021-05-03 17:11:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:32,235 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:32,236 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:32,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:32,436 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 85 times [2021-05-03 17:11:32,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:32,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230587586] [2021-05-03 17:11:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:32,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230587586] [2021-05-03 17:11:32,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450595809] [2021-05-03 17:11:32,603 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 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 [2021-05-03 17:11:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:32,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:32,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 17:11:32,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746057622] [2021-05-03 17:11:32,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:11:32,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:32,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:11:32,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:11:32,982 INFO L87 Difference]: Start difference. First operand 6570 states and 24817 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:36,031 INFO L93 Difference]: Finished difference Result 13578 states and 47526 transitions. [2021-05-03 17:11:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 17:11:36,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:36,084 INFO L225 Difference]: With dead ends: 13578 [2021-05-03 17:11:36,084 INFO L226 Difference]: Without dead ends: 13578 [2021-05-03 17:11:36,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1854.0ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 17:11:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13578 states. [2021-05-03 17:11:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13578 to 7315. [2021-05-03 17:11:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 3.7873940388296417) internal successors, (27701), 7314 states have internal predecessors, (27701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 27701 transitions. [2021-05-03 17:11:36,354 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 27701 transitions. Word has length 28 [2021-05-03 17:11:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:36,354 INFO L480 AbstractCegarLoop]: Abstraction has 7315 states and 27701 transitions. [2021-05-03 17:11:36,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 27701 transitions. [2021-05-03 17:11:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:36,372 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:36,372 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:36,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:36,585 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:36,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 86 times [2021-05-03 17:11:36,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:36,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001304949] [2021-05-03 17:11:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:36,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001304949] [2021-05-03 17:11:36,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779780026] [2021-05-03 17:11:36,762 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 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 [2021-05-03 17:11:36,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:11:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:37,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:37,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 17:11:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394986533] [2021-05-03 17:11:37,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:11:37,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:37,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:11:37,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:11:37,089 INFO L87 Difference]: Start difference. First operand 7315 states and 27701 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:40,114 INFO L93 Difference]: Finished difference Result 13779 states and 48245 transitions. [2021-05-03 17:11:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 17:11:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:40,171 INFO L225 Difference]: With dead ends: 13779 [2021-05-03 17:11:40,171 INFO L226 Difference]: Without dead ends: 13779 [2021-05-03 17:11:40,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1795.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 17:11:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2021-05-03 17:11:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 7585. [2021-05-03 17:11:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.7655590717299576) internal successors, (28558), 7584 states have internal predecessors, (28558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 28558 transitions. [2021-05-03 17:11:40,447 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 28558 transitions. Word has length 28 [2021-05-03 17:11:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:40,447 INFO L480 AbstractCegarLoop]: Abstraction has 7585 states and 28558 transitions. [2021-05-03 17:11:40,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 28558 transitions. [2021-05-03 17:11:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:40,465 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:40,465 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:40,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:40,665 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 87 times [2021-05-03 17:11:40,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:40,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32743621] [2021-05-03 17:11:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:40,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32743621] [2021-05-03 17:11:40,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785988423] [2021-05-03 17:11:40,847 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 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 [2021-05-03 17:11:40,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:11:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:11:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:41,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:41,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:11:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828205817] [2021-05-03 17:11:41,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:11:41,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:11:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:11:41,247 INFO L87 Difference]: Start difference. First operand 7585 states and 28558 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:42,750 INFO L93 Difference]: Finished difference Result 10144 states and 36719 transitions. [2021-05-03 17:11:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:11:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:42,783 INFO L225 Difference]: With dead ends: 10144 [2021-05-03 17:11:42,784 INFO L226 Difference]: Without dead ends: 10114 [2021-05-03 17:11:42,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 908.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:11:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2021-05-03 17:11:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 8411. [2021-05-03 17:11:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8411 states, 8410 states have (on average 3.7869203329369796) internal successors, (31848), 8410 states have internal predecessors, (31848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8411 states to 8411 states and 31848 transitions. [2021-05-03 17:11:43,023 INFO L78 Accepts]: Start accepts. Automaton has 8411 states and 31848 transitions. Word has length 28 [2021-05-03 17:11:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:43,023 INFO L480 AbstractCegarLoop]: Abstraction has 8411 states and 31848 transitions. [2021-05-03 17:11:43,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 8411 states and 31848 transitions. [2021-05-03 17:11:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:43,043 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:43,043 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:43,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:43,244 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 88 times [2021-05-03 17:11:43,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:43,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484333050] [2021-05-03 17:11:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:11:43,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484333050] [2021-05-03 17:11:43,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591971178] [2021-05-03 17:11:43,340 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 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 [2021-05-03 17:11:43,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:11:43,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:11:43,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:11:43,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:43,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:11:43,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450437211] [2021-05-03 17:11:43,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:11:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:11:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:11:43,741 INFO L87 Difference]: Start difference. First operand 8411 states and 31848 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:45,191 INFO L93 Difference]: Finished difference Result 10709 states and 38590 transitions. [2021-05-03 17:11:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:11:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:45,227 INFO L225 Difference]: With dead ends: 10709 [2021-05-03 17:11:45,227 INFO L226 Difference]: Without dead ends: 10709 [2021-05-03 17:11:45,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 881.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:11:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10709 states. [2021-05-03 17:11:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10709 to 8451. [2021-05-03 17:11:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 3.7830769230769232) internal successors, (31967), 8450 states have internal predecessors, (31967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 31967 transitions. [2021-05-03 17:11:45,469 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 31967 transitions. Word has length 28 [2021-05-03 17:11:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:45,469 INFO L480 AbstractCegarLoop]: Abstraction has 8451 states and 31967 transitions. [2021-05-03 17:11:45,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 31967 transitions. [2021-05-03 17:11:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:45,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:45,492 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:45,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:45,709 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 89 times [2021-05-03 17:11:45,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:45,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470964765] [2021-05-03 17:11:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:11:45,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470964765] [2021-05-03 17:11:45,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954928333] [2021-05-03 17:11:45,829 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 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 [2021-05-03 17:11:45,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 17:11:45,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:45,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:11:46,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:46,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 17:11:46,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372240848] [2021-05-03 17:11:46,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:11:46,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:46,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:11:46,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:11:46,191 INFO L87 Difference]: Start difference. First operand 8451 states and 31967 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:48,734 INFO L93 Difference]: Finished difference Result 14453 states and 51485 transitions. [2021-05-03 17:11:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:11:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:48,790 INFO L225 Difference]: With dead ends: 14453 [2021-05-03 17:11:48,790 INFO L226 Difference]: Without dead ends: 14449 [2021-05-03 17:11:48,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1481.6ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:11:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14449 states. [2021-05-03 17:11:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14449 to 8349. [2021-05-03 17:11:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 8348 states have (on average 3.7870148538572113) internal successors, (31614), 8348 states have internal predecessors, (31614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 31614 transitions. [2021-05-03 17:11:49,074 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 31614 transitions. Word has length 28 [2021-05-03 17:11:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:49,074 INFO L480 AbstractCegarLoop]: Abstraction has 8349 states and 31614 transitions. [2021-05-03 17:11:49,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 31614 transitions. [2021-05-03 17:11:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:49,088 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:49,088 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:49,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:49,288 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 90 times [2021-05-03 17:11:49,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:49,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159351315] [2021-05-03 17:11:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:49,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159351315] [2021-05-03 17:11:49,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995361013] [2021-05-03 17:11:49,411 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 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 [2021-05-03 17:11:49,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:11:49,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:11:49,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:49,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:49,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:11:49,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905673130] [2021-05-03 17:11:49,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:11:49,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:11:49,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:11:49,819 INFO L87 Difference]: Start difference. First operand 8349 states and 31614 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:11:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:51,584 INFO L93 Difference]: Finished difference Result 10938 states and 39433 transitions. [2021-05-03 17:11:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:11:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:11:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:51,622 INFO L225 Difference]: With dead ends: 10938 [2021-05-03 17:11:51,622 INFO L226 Difference]: Without dead ends: 10938 [2021-05-03 17:11:51,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1088.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:11:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10938 states. [2021-05-03 17:11:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10938 to 8295. [2021-05-03 17:11:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780564263322884) internal successors, (31356), 8294 states have internal predecessors, (31356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31356 transitions. [2021-05-03 17:11:51,850 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31356 transitions. Word has length 28 [2021-05-03 17:11:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:51,850 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31356 transitions. [2021-05-03 17:11:51,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:11:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31356 transitions. [2021-05-03 17:11:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:51,870 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:51,870 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:52,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-05-03 17:11:52,071 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 91 times [2021-05-03 17:11:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:52,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225486361] [2021-05-03 17:11:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:52,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225486361] [2021-05-03 17:11:52,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200971705] [2021-05-03 17:11:52,244 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 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 [2021-05-03 17:11:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:52,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:52,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 17:11:52,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516159030] [2021-05-03 17:11:52,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:11:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:11:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:11:52,602 INFO L87 Difference]: Start difference. First operand 8295 states and 31356 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:55,573 INFO L93 Difference]: Finished difference Result 14334 states and 50973 transitions. [2021-05-03 17:11:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 17:11:55,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:11:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:55,627 INFO L225 Difference]: With dead ends: 14334 [2021-05-03 17:11:55,627 INFO L226 Difference]: Without dead ends: 14322 [2021-05-03 17:11:55,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1804.6ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:11:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14322 states. [2021-05-03 17:11:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14322 to 8295. [2021-05-03 17:11:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780081986978539) internal successors, (31352), 8294 states have internal predecessors, (31352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31352 transitions. [2021-05-03 17:11:55,915 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31352 transitions. Word has length 28 [2021-05-03 17:11:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:55,915 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31352 transitions. [2021-05-03 17:11:55,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31352 transitions. [2021-05-03 17:11:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:11:55,934 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:55,934 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:56,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-05-03 17:11:56,135 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:56,135 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 92 times [2021-05-03 17:11:56,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:56,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464503707] [2021-05-03 17:11:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464503707] [2021-05-03 17:11:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199289279] [2021-05-03 17:11:56,310 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 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 [2021-05-03 17:11:56,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:11:56,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:11:56,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:56,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:56,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 17:11:56,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477596150] [2021-05-03 17:11:56,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:11:56,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:11:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:11:56,752 INFO L87 Difference]: Start difference. First operand 8295 states and 31352 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:02,001 INFO L93 Difference]: Finished difference Result 22194 states and 77568 transitions. [2021-05-03 17:12:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 17:12:02,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:02,075 INFO L225 Difference]: With dead ends: 22194 [2021-05-03 17:12:02,075 INFO L226 Difference]: Without dead ends: 22194 [2021-05-03 17:12:02,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 3228.2ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 17:12:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22194 states. [2021-05-03 17:12:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22194 to 11506. [2021-05-03 17:12:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 11505 states have (on average 3.8243372446762276) internal successors, (43999), 11505 states have internal predecessors, (43999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 43999 transitions. [2021-05-03 17:12:02,617 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 43999 transitions. Word has length 28 [2021-05-03 17:12:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:02,618 INFO L480 AbstractCegarLoop]: Abstraction has 11506 states and 43999 transitions. [2021-05-03 17:12:02,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 43999 transitions. [2021-05-03 17:12:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:02,645 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:02,645 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:02,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-05-03 17:12:02,846 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 93 times [2021-05-03 17:12:02,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:02,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385950857] [2021-05-03 17:12:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:03,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385950857] [2021-05-03 17:12:03,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155677223] [2021-05-03 17:12:03,043 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 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 [2021-05-03 17:12:03,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 17:12:03,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:03,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:03,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 17:12:03,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926770981] [2021-05-03 17:12:03,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:12:03,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:03,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:12:03,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:12:03,461 INFO L87 Difference]: Start difference. First operand 11506 states and 43999 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:08,193 INFO L93 Difference]: Finished difference Result 21305 states and 75279 transitions. [2021-05-03 17:12:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 17:12:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:08,277 INFO L225 Difference]: With dead ends: 21305 [2021-05-03 17:12:08,277 INFO L226 Difference]: Without dead ends: 21293 [2021-05-03 17:12:08,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2757.4ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 17:12:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21293 states. [2021-05-03 17:12:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21293 to 11322. [2021-05-03 17:12:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 3.8303153431675647) internal successors, (43363), 11321 states have internal predecessors, (43363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 43363 transitions. [2021-05-03 17:12:08,999 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 43363 transitions. Word has length 28 [2021-05-03 17:12:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:09,000 INFO L480 AbstractCegarLoop]: Abstraction has 11322 states and 43363 transitions. [2021-05-03 17:12:09,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 43363 transitions. [2021-05-03 17:12:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:09,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:09,029 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:09,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:12:09,229 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:09,230 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 94 times [2021-05-03 17:12:09,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:09,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010829588] [2021-05-03 17:12:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:09,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010829588] [2021-05-03 17:12:09,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263420738] [2021-05-03 17:12:09,399 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 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 [2021-05-03 17:12:09,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:12:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:09,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:09,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 17:12:09,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217845830] [2021-05-03 17:12:09,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:12:09,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:12:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:12:09,862 INFO L87 Difference]: Start difference. First operand 11322 states and 43363 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:14,677 INFO L93 Difference]: Finished difference Result 21173 states and 74684 transitions. [2021-05-03 17:12:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 17:12:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:14,756 INFO L225 Difference]: With dead ends: 21173 [2021-05-03 17:12:14,756 INFO L226 Difference]: Without dead ends: 21137 [2021-05-03 17:12:14,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 2918.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 17:12:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2021-05-03 17:12:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 11370. [2021-05-03 17:12:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11369 states have (on average 3.829624417275046) internal successors, (43539), 11369 states have internal predecessors, (43539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 43539 transitions. [2021-05-03 17:12:15,300 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 43539 transitions. Word has length 28 [2021-05-03 17:12:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:15,300 INFO L480 AbstractCegarLoop]: Abstraction has 11370 states and 43539 transitions. [2021-05-03 17:12:15,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 43539 transitions. [2021-05-03 17:12:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:15,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:15,331 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:15,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-05-03 17:12:15,532 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 95 times [2021-05-03 17:12:15,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:15,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672356518] [2021-05-03 17:12:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:15,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672356518] [2021-05-03 17:12:15,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686162894] [2021-05-03 17:12:15,724 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 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 [2021-05-03 17:12:15,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 17:12:15,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:16,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:16,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 17:12:16,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131147867] [2021-05-03 17:12:16,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:12:16,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:12:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:12:16,343 INFO L87 Difference]: Start difference. First operand 11370 states and 43539 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:23,340 INFO L93 Difference]: Finished difference Result 20914 states and 74023 transitions. [2021-05-03 17:12:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 17:12:23,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:23,424 INFO L225 Difference]: With dead ends: 20914 [2021-05-03 17:12:23,424 INFO L226 Difference]: Without dead ends: 20914 [2021-05-03 17:12:23,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 4254.5ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 17:12:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20914 states. [2021-05-03 17:12:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20914 to 11566. [2021-05-03 17:12:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11566 states, 11565 states have (on average 3.820925205361003) internal successors, (44189), 11565 states have internal predecessors, (44189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11566 states to 11566 states and 44189 transitions. [2021-05-03 17:12:23,972 INFO L78 Accepts]: Start accepts. Automaton has 11566 states and 44189 transitions. Word has length 28 [2021-05-03 17:12:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:23,972 INFO L480 AbstractCegarLoop]: Abstraction has 11566 states and 44189 transitions. [2021-05-03 17:12:23,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 11566 states and 44189 transitions. [2021-05-03 17:12:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:24,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:24,003 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:24,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:12:24,213 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 96 times [2021-05-03 17:12:24,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:24,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802760536] [2021-05-03 17:12:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:24,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802760536] [2021-05-03 17:12:24,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969968631] [2021-05-03 17:12:24,376 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 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 [2021-05-03 17:12:24,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:12:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:24,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:24,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 17:12:24,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189133491] [2021-05-03 17:12:24,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:12:24,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:24,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:12:24,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:12:24,977 INFO L87 Difference]: Start difference. First operand 11566 states and 44189 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:30,752 INFO L93 Difference]: Finished difference Result 20375 states and 72554 transitions. [2021-05-03 17:12:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 17:12:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:30,836 INFO L225 Difference]: With dead ends: 20375 [2021-05-03 17:12:30,837 INFO L226 Difference]: Without dead ends: 20363 [2021-05-03 17:12:30,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 3400.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 17:12:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20363 states. [2021-05-03 17:12:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20363 to 11444. [2021-05-03 17:12:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 3.82469632089487) internal successors, (43766), 11443 states have internal predecessors, (43766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 43766 transitions. [2021-05-03 17:12:31,377 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 43766 transitions. Word has length 28 [2021-05-03 17:12:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:31,377 INFO L480 AbstractCegarLoop]: Abstraction has 11444 states and 43766 transitions. [2021-05-03 17:12:31,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 43766 transitions. [2021-05-03 17:12:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:31,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:31,404 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:31,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-05-03 17:12:31,605 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 97 times [2021-05-03 17:12:31,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:31,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396339674] [2021-05-03 17:12:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:31,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396339674] [2021-05-03 17:12:31,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397056125] [2021-05-03 17:12:31,789 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 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 [2021-05-03 17:12:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:31,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:31,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:32,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:32,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-03 17:12:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162232012] [2021-05-03 17:12:32,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:12:32,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:12:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:12:32,269 INFO L87 Difference]: Start difference. First operand 11444 states and 43766 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:35,268 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 17:12:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:37,007 INFO L93 Difference]: Finished difference Result 19613 states and 70459 transitions. [2021-05-03 17:12:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 17:12:37,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:37,086 INFO L225 Difference]: With dead ends: 19613 [2021-05-03 17:12:37,086 INFO L226 Difference]: Without dead ends: 19577 [2021-05-03 17:12:37,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 2967.0ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 17:12:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19577 states. [2021-05-03 17:12:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19577 to 11468. [2021-05-03 17:12:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 11467 states have (on average 3.8236679166303307) internal successors, (43846), 11467 states have internal predecessors, (43846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 43846 transitions. [2021-05-03 17:12:37,543 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 43846 transitions. Word has length 28 [2021-05-03 17:12:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:37,543 INFO L480 AbstractCegarLoop]: Abstraction has 11468 states and 43846 transitions. [2021-05-03 17:12:37,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 43846 transitions. [2021-05-03 17:12:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:37,572 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:37,573 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:37,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:12:37,773 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 98 times [2021-05-03 17:12:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:37,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721026135] [2021-05-03 17:12:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:12:38,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721026135] [2021-05-03 17:12:38,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173636648] [2021-05-03 17:12:38,008 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 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 [2021-05-03 17:12:38,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:12:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:38,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:38,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:38,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:12:38,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690547289] [2021-05-03 17:12:38,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:12:38,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:38,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:12:38,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:12:38,643 INFO L87 Difference]: Start difference. First operand 11468 states and 43846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:44,965 INFO L93 Difference]: Finished difference Result 28622 states and 102312 transitions. [2021-05-03 17:12:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-03 17:12:44,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:45,083 INFO L225 Difference]: With dead ends: 28622 [2021-05-03 17:12:45,083 INFO L226 Difference]: Without dead ends: 28622 [2021-05-03 17:12:45,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 3968.8ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 17:12:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28622 states. [2021-05-03 17:12:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28622 to 11820. [2021-05-03 17:12:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11820 states, 11819 states have (on average 3.8508334038412726) internal successors, (45513), 11819 states have internal predecessors, (45513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 45513 transitions. [2021-05-03 17:12:45,671 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 45513 transitions. Word has length 28 [2021-05-03 17:12:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:45,671 INFO L480 AbstractCegarLoop]: Abstraction has 11820 states and 45513 transitions. [2021-05-03 17:12:45,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 45513 transitions. [2021-05-03 17:12:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:45,701 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:45,701 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:45,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-05-03 17:12:45,902 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 99 times [2021-05-03 17:12:45,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:45,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64580448] [2021-05-03 17:12:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:12:46,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64580448] [2021-05-03 17:12:46,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641400908] [2021-05-03 17:12:46,094 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 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 [2021-05-03 17:12:46,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:12:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:46,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:46,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:46,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:12:46,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930025021] [2021-05-03 17:12:46,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:12:46,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:12:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:12:46,777 INFO L87 Difference]: Start difference. First operand 11820 states and 45513 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:52,185 INFO L93 Difference]: Finished difference Result 28081 states and 101108 transitions. [2021-05-03 17:12:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-03 17:12:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:52,302 INFO L225 Difference]: With dead ends: 28081 [2021-05-03 17:12:52,302 INFO L226 Difference]: Without dead ends: 28081 [2021-05-03 17:12:52,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 3725.1ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 17:12:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28081 states. [2021-05-03 17:12:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28081 to 11710. [2021-05-03 17:12:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11710 states, 11709 states have (on average 3.838244085746007) internal successors, (44942), 11709 states have internal predecessors, (44942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11710 states to 11710 states and 44942 transitions. [2021-05-03 17:12:52,956 INFO L78 Accepts]: Start accepts. Automaton has 11710 states and 44942 transitions. Word has length 28 [2021-05-03 17:12:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:52,956 INFO L480 AbstractCegarLoop]: Abstraction has 11710 states and 44942 transitions. [2021-05-03 17:12:52,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 11710 states and 44942 transitions. [2021-05-03 17:12:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:52,985 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:52,985 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:53,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:12:53,186 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 100 times [2021-05-03 17:12:53,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:53,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374678765] [2021-05-03 17:12:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:12:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374678765] [2021-05-03 17:12:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905276017] [2021-05-03 17:12:53,378 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 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 [2021-05-03 17:12:53,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:12:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:53,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:53,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 17:12:53,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93840530] [2021-05-03 17:12:53,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:12:53,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:12:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:12:53,990 INFO L87 Difference]: Start difference. First operand 11710 states and 44942 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:58,054 INFO L93 Difference]: Finished difference Result 22237 states and 80394 transitions. [2021-05-03 17:12:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 17:12:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:12:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:58,143 INFO L225 Difference]: With dead ends: 22237 [2021-05-03 17:12:58,143 INFO L226 Difference]: Without dead ends: 22237 [2021-05-03 17:12:58,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2492.9ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 17:12:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22237 states. [2021-05-03 17:12:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22237 to 11719. [2021-05-03 17:12:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11719 states, 11718 states have (on average 3.8372589179040792) internal successors, (44965), 11718 states have internal predecessors, (44965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 44965 transitions. [2021-05-03 17:12:58,680 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 44965 transitions. Word has length 28 [2021-05-03 17:12:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:58,680 INFO L480 AbstractCegarLoop]: Abstraction has 11719 states and 44965 transitions. [2021-05-03 17:12:58,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 44965 transitions. [2021-05-03 17:12:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:12:58,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:58,711 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:58,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:12:58,925 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 101 times [2021-05-03 17:12:58,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:58,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102150822] [2021-05-03 17:12:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:12:59,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102150822] [2021-05-03 17:12:59,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261254336] [2021-05-03 17:12:59,104 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 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 [2021-05-03 17:12:59,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 17:12:59,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:12:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:59,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:59,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 17:12:59,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563175666] [2021-05-03 17:12:59,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:12:59,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:12:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:12:59,751 INFO L87 Difference]: Start difference. First operand 11719 states and 44965 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:03,361 INFO L93 Difference]: Finished difference Result 20596 states and 75154 transitions. [2021-05-03 17:13:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 17:13:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:03,434 INFO L225 Difference]: With dead ends: 20596 [2021-05-03 17:13:03,434 INFO L226 Difference]: Without dead ends: 20596 [2021-05-03 17:13:03,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2178.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 17:13:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20596 states. [2021-05-03 17:13:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20596 to 11731. [2021-05-03 17:13:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11731 states, 11730 states have (on average 3.8365728900255753) internal successors, (45003), 11730 states have internal predecessors, (45003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11731 states to 11731 states and 45003 transitions. [2021-05-03 17:13:03,888 INFO L78 Accepts]: Start accepts. Automaton has 11731 states and 45003 transitions. Word has length 28 [2021-05-03 17:13:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:03,888 INFO L480 AbstractCegarLoop]: Abstraction has 11731 states and 45003 transitions. [2021-05-03 17:13:03,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 11731 states and 45003 transitions. [2021-05-03 17:13:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:03,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:03,918 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:04,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:04,119 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 102 times [2021-05-03 17:13:04,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:04,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783734459] [2021-05-03 17:13:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:04,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783734459] [2021-05-03 17:13:04,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041873362] [2021-05-03 17:13:04,293 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 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 [2021-05-03 17:13:04,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 17:13:04,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:05,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:05,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:13:05,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078970861] [2021-05-03 17:13:05,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:13:05,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:05,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:13:05,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:13:05,012 INFO L87 Difference]: Start difference. First operand 11731 states and 45003 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:10,046 INFO L93 Difference]: Finished difference Result 21379 states and 77391 transitions. [2021-05-03 17:13:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 17:13:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:10,140 INFO L225 Difference]: With dead ends: 21379 [2021-05-03 17:13:10,140 INFO L226 Difference]: Without dead ends: 21379 [2021-05-03 17:13:10,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3463.1ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 17:13:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2021-05-03 17:13:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 11839. [2021-05-03 17:13:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11839 states, 11838 states have (on average 3.829785436729177) internal successors, (45337), 11838 states have internal predecessors, (45337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11839 states to 11839 states and 45337 transitions. [2021-05-03 17:13:10,721 INFO L78 Accepts]: Start accepts. Automaton has 11839 states and 45337 transitions. Word has length 28 [2021-05-03 17:13:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:10,721 INFO L480 AbstractCegarLoop]: Abstraction has 11839 states and 45337 transitions. [2021-05-03 17:13:10,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11839 states and 45337 transitions. [2021-05-03 17:13:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:10,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:10,751 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:10,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-05-03 17:13:10,952 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 103 times [2021-05-03 17:13:10,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:10,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942807493] [2021-05-03 17:13:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:11,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942807493] [2021-05-03 17:13:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184600230] [2021-05-03 17:13:11,083 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 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 [2021-05-03 17:13:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:11,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:11,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:13:11,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552507329] [2021-05-03 17:13:11,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:13:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:13:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:13:11,666 INFO L87 Difference]: Start difference. First operand 11839 states and 45337 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:16,400 INFO L93 Difference]: Finished difference Result 20760 states and 75687 transitions. [2021-05-03 17:13:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 17:13:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:16,488 INFO L225 Difference]: With dead ends: 20760 [2021-05-03 17:13:16,488 INFO L226 Difference]: Without dead ends: 20756 [2021-05-03 17:13:16,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 2930.9ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 17:13:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20756 states. [2021-05-03 17:13:17,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20756 to 11765. [2021-05-03 17:13:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11765 states, 11764 states have (on average 3.833560013600816) internal successors, (45098), 11764 states have internal predecessors, (45098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11765 states to 11765 states and 45098 transitions. [2021-05-03 17:13:17,171 INFO L78 Accepts]: Start accepts. Automaton has 11765 states and 45098 transitions. Word has length 28 [2021-05-03 17:13:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:17,171 INFO L480 AbstractCegarLoop]: Abstraction has 11765 states and 45098 transitions. [2021-05-03 17:13:17,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 11765 states and 45098 transitions. [2021-05-03 17:13:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:17,200 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:17,200 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:17,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-05-03 17:13:17,417 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 104 times [2021-05-03 17:13:17,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:17,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191264562] [2021-05-03 17:13:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:17,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191264562] [2021-05-03 17:13:17,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57714950] [2021-05-03 17:13:17,650 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 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 [2021-05-03 17:13:17,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:13:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:18,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:18,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:13:18,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900500482] [2021-05-03 17:13:18,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:13:18,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:18,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:13:18,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:13:18,327 INFO L87 Difference]: Start difference. First operand 11765 states and 45098 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:23,709 INFO L93 Difference]: Finished difference Result 20065 states and 72452 transitions. [2021-05-03 17:13:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 17:13:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:23,794 INFO L225 Difference]: With dead ends: 20065 [2021-05-03 17:13:23,794 INFO L226 Difference]: Without dead ends: 20065 [2021-05-03 17:13:23,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 3487.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 17:13:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20065 states. [2021-05-03 17:13:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20065 to 11992. [2021-05-03 17:13:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11992 states, 11991 states have (on average 3.8358769076807606) internal successors, (45996), 11991 states have internal predecessors, (45996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11992 states to 11992 states and 45996 transitions. [2021-05-03 17:13:24,288 INFO L78 Accepts]: Start accepts. Automaton has 11992 states and 45996 transitions. Word has length 28 [2021-05-03 17:13:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:24,288 INFO L480 AbstractCegarLoop]: Abstraction has 11992 states and 45996 transitions. [2021-05-03 17:13:24,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 11992 states and 45996 transitions. [2021-05-03 17:13:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:24,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:24,320 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:24,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:24,521 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 105 times [2021-05-03 17:13:24,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:24,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992544027] [2021-05-03 17:13:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992544027] [2021-05-03 17:13:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360768716] [2021-05-03 17:13:24,729 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 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 [2021-05-03 17:13:24,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 17:13:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:24,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:25,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:25,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:13:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066013835] [2021-05-03 17:13:25,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:13:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:13:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:13:25,341 INFO L87 Difference]: Start difference. First operand 11992 states and 45996 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:29,438 INFO L93 Difference]: Finished difference Result 19596 states and 71161 transitions. [2021-05-03 17:13:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 17:13:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:29,521 INFO L225 Difference]: With dead ends: 19596 [2021-05-03 17:13:29,522 INFO L226 Difference]: Without dead ends: 19584 [2021-05-03 17:13:29,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2719.4ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 17:13:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19584 states. [2021-05-03 17:13:29,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19584 to 12094. [2021-05-03 17:13:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12094 states, 12093 states have (on average 3.8302323658314728) internal successors, (46319), 12093 states have internal predecessors, (46319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12094 states to 12094 states and 46319 transitions. [2021-05-03 17:13:30,079 INFO L78 Accepts]: Start accepts. Automaton has 12094 states and 46319 transitions. Word has length 28 [2021-05-03 17:13:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:30,079 INFO L480 AbstractCegarLoop]: Abstraction has 12094 states and 46319 transitions. [2021-05-03 17:13:30,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12094 states and 46319 transitions. [2021-05-03 17:13:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:30,119 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:30,119 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:30,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-05-03 17:13:30,334 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:30,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 73 times [2021-05-03 17:13:30,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:30,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094801839] [2021-05-03 17:13:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:30,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094801839] [2021-05-03 17:13:30,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366117910] [2021-05-03 17:13:30,586 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 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 [2021-05-03 17:13:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:31,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:31,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 17:13:31,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653464480] [2021-05-03 17:13:31,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:13:31,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:31,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:13:31,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:13:31,067 INFO L87 Difference]: Start difference. First operand 12094 states and 46319 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:13:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:33,431 INFO L93 Difference]: Finished difference Result 17012 states and 63246 transitions. [2021-05-03 17:13:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:13:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-05-03 17:13:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:33,514 INFO L225 Difference]: With dead ends: 17012 [2021-05-03 17:13:33,514 INFO L226 Difference]: Without dead ends: 17012 [2021-05-03 17:13:33,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1353.0ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:13:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17012 states. [2021-05-03 17:13:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17012 to 12166. [2021-05-03 17:13:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.8256473489519114) internal successors, (46539), 12165 states have internal predecessors, (46539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 46539 transitions. [2021-05-03 17:13:33,933 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 46539 transitions. Word has length 28 [2021-05-03 17:13:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:33,933 INFO L480 AbstractCegarLoop]: Abstraction has 12166 states and 46539 transitions. [2021-05-03 17:13:33,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:13:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 46539 transitions. [2021-05-03 17:13:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:33,966 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:33,966 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:34,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:34,181 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:34,183 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 74 times [2021-05-03 17:13:34,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:34,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052630217] [2021-05-03 17:13:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:34,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052630217] [2021-05-03 17:13:34,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789128668] [2021-05-03 17:13:34,359 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 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 [2021-05-03 17:13:34,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:13:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:35,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:35,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 17:13:35,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513422595] [2021-05-03 17:13:35,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:13:35,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:13:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:13:35,019 INFO L87 Difference]: Start difference. First operand 12166 states and 46539 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:37,226 INFO L93 Difference]: Finished difference Result 15303 states and 56668 transitions. [2021-05-03 17:13:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 17:13:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:37,296 INFO L225 Difference]: With dead ends: 15303 [2021-05-03 17:13:37,296 INFO L226 Difference]: Without dead ends: 15252 [2021-05-03 17:13:37,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1657.3ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:13:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15252 states. [2021-05-03 17:13:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15252 to 11807. [2021-05-03 17:13:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11807 states, 11806 states have (on average 3.8175503981026595) internal successors, (45070), 11806 states have internal predecessors, (45070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11807 states to 11807 states and 45070 transitions. [2021-05-03 17:13:37,745 INFO L78 Accepts]: Start accepts. Automaton has 11807 states and 45070 transitions. Word has length 28 [2021-05-03 17:13:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:37,745 INFO L480 AbstractCegarLoop]: Abstraction has 11807 states and 45070 transitions. [2021-05-03 17:13:37,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 11807 states and 45070 transitions. [2021-05-03 17:13:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:37,777 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:37,777 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:37,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:37,993 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 75 times [2021-05-03 17:13:37,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:37,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252550317] [2021-05-03 17:13:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:38,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252550317] [2021-05-03 17:13:38,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123525033] [2021-05-03 17:13:38,184 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 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 [2021-05-03 17:13:38,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 17:13:38,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:38,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:38,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:38,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:13:38,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658724520] [2021-05-03 17:13:38,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:13:38,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:13:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:13:38,658 INFO L87 Difference]: Start difference. First operand 11807 states and 45070 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:13:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:41,001 INFO L93 Difference]: Finished difference Result 17683 states and 64727 transitions. [2021-05-03 17:13:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 17:13:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:13:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:41,060 INFO L225 Difference]: With dead ends: 17683 [2021-05-03 17:13:41,060 INFO L226 Difference]: Without dead ends: 17683 [2021-05-03 17:13:41,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1553.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:13:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17683 states. [2021-05-03 17:13:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17683 to 12145. [2021-05-03 17:13:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12145 states, 12144 states have (on average 3.799324769433465) internal successors, (46139), 12144 states have internal predecessors, (46139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12145 states to 12145 states and 46139 transitions. [2021-05-03 17:13:41,451 INFO L78 Accepts]: Start accepts. Automaton has 12145 states and 46139 transitions. Word has length 28 [2021-05-03 17:13:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:41,452 INFO L480 AbstractCegarLoop]: Abstraction has 12145 states and 46139 transitions. [2021-05-03 17:13:41,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:13:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12145 states and 46139 transitions. [2021-05-03 17:13:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:41,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:41,478 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:41,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:41,679 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 76 times [2021-05-03 17:13:41,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:41,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735225460] [2021-05-03 17:13:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:41,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735225460] [2021-05-03 17:13:41,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904542975] [2021-05-03 17:13:41,842 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 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 [2021-05-03 17:13:41,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:13:41,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:41,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:41,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:42,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:42,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:13:42,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083037520] [2021-05-03 17:13:42,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:13:42,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:42,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:13:42,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:13:42,248 INFO L87 Difference]: Start difference. First operand 12145 states and 46139 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:13:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:44,186 INFO L93 Difference]: Finished difference Result 17151 states and 63339 transitions. [2021-05-03 17:13:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 17:13:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:13:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:44,248 INFO L225 Difference]: With dead ends: 17151 [2021-05-03 17:13:44,248 INFO L226 Difference]: Without dead ends: 17143 [2021-05-03 17:13:44,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1118.0ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:13:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17143 states. [2021-05-03 17:13:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17143 to 12085. [2021-05-03 17:13:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12085 states, 12084 states have (on average 3.8013075140681893) internal successors, (45935), 12084 states have internal predecessors, (45935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12085 states to 12085 states and 45935 transitions. [2021-05-03 17:13:44,627 INFO L78 Accepts]: Start accepts. Automaton has 12085 states and 45935 transitions. Word has length 28 [2021-05-03 17:13:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:44,627 INFO L480 AbstractCegarLoop]: Abstraction has 12085 states and 45935 transitions. [2021-05-03 17:13:44,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:13:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12085 states and 45935 transitions. [2021-05-03 17:13:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:44,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:44,654 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:44,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:44,872 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:44,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 77 times [2021-05-03 17:13:44,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:44,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999163353] [2021-05-03 17:13:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:45,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999163353] [2021-05-03 17:13:45,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864564121] [2021-05-03 17:13:45,067 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:13:45,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:13:45,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:45,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:45,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:45,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:45,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 17:13:45,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516699534] [2021-05-03 17:13:45,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:13:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:13:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:13:45,491 INFO L87 Difference]: Start difference. First operand 12085 states and 45935 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:13:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:47,515 INFO L93 Difference]: Finished difference Result 17051 states and 63051 transitions. [2021-05-03 17:13:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:13:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-05-03 17:13:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:47,574 INFO L225 Difference]: With dead ends: 17051 [2021-05-03 17:13:47,574 INFO L226 Difference]: Without dead ends: 17039 [2021-05-03 17:13:47,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1216.1ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 17:13:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17039 states. [2021-05-03 17:13:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17039 to 12051. [2021-05-03 17:13:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12051 states, 12050 states have (on average 3.8034854771784232) internal successors, (45832), 12050 states have internal predecessors, (45832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12051 states to 12051 states and 45832 transitions. [2021-05-03 17:13:47,926 INFO L78 Accepts]: Start accepts. Automaton has 12051 states and 45832 transitions. Word has length 28 [2021-05-03 17:13:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:47,926 INFO L480 AbstractCegarLoop]: Abstraction has 12051 states and 45832 transitions. [2021-05-03 17:13:47,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:13:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 12051 states and 45832 transitions. [2021-05-03 17:13:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:47,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:47,945 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:48,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-05-03 17:13:48,145 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:48,146 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 78 times [2021-05-03 17:13:48,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:48,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646307385] [2021-05-03 17:13:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:48,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646307385] [2021-05-03 17:13:48,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239409936] [2021-05-03 17:13:48,233 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 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 [2021-05-03 17:13:48,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:13:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:13:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:48,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:48,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 17:13:48,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134140483] [2021-05-03 17:13:48,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:13:48,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:13:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:13:48,823 INFO L87 Difference]: Start difference. First operand 12051 states and 45832 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:53,278 INFO L93 Difference]: Finished difference Result 23232 states and 83078 transitions. [2021-05-03 17:13:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:13:53,281 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:53,359 INFO L225 Difference]: With dead ends: 23232 [2021-05-03 17:13:53,359 INFO L226 Difference]: Without dead ends: 23232 [2021-05-03 17:13:53,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2447.0ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 17:13:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23232 states. [2021-05-03 17:13:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23232 to 12031. [2021-05-03 17:13:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12031 states, 12030 states have (on average 3.8021612635078967) internal successors, (45740), 12030 states have internal predecessors, (45740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 45740 transitions. [2021-05-03 17:13:53,791 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 45740 transitions. Word has length 28 [2021-05-03 17:13:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:53,791 INFO L480 AbstractCegarLoop]: Abstraction has 12031 states and 45740 transitions. [2021-05-03 17:13:53,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 45740 transitions. [2021-05-03 17:13:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:53,817 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:53,817 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:54,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:13:54,017 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 106 times [2021-05-03 17:13:54,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:54,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643255042] [2021-05-03 17:13:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:54,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643255042] [2021-05-03 17:13:54,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645977661] [2021-05-03 17:13:54,138 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 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 [2021-05-03 17:13:54,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:13:54,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:54,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:13:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:54,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:54,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 17:13:54,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708947189] [2021-05-03 17:13:54,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:13:54,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:13:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:13:54,697 INFO L87 Difference]: Start difference. First operand 12031 states and 45740 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:13:58,051 INFO L93 Difference]: Finished difference Result 19093 states and 69327 transitions. [2021-05-03 17:13:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 17:13:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:13:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:13:58,119 INFO L225 Difference]: With dead ends: 19093 [2021-05-03 17:13:58,120 INFO L226 Difference]: Without dead ends: 19080 [2021-05-03 17:13:58,120 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1934.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 17:13:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19080 states. [2021-05-03 17:13:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19080 to 13545. [2021-05-03 17:13:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13545 states, 13544 states have (on average 3.87322799763733) internal successors, (52459), 13544 states have internal predecessors, (52459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13545 states to 13545 states and 52459 transitions. [2021-05-03 17:13:58,653 INFO L78 Accepts]: Start accepts. Automaton has 13545 states and 52459 transitions. Word has length 28 [2021-05-03 17:13:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:13:58,653 INFO L480 AbstractCegarLoop]: Abstraction has 13545 states and 52459 transitions. [2021-05-03 17:13:58,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:13:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 13545 states and 52459 transitions. [2021-05-03 17:13:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:13:58,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:13:58,688 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:13:58,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-05-03 17:13:58,889 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:13:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:13:58,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 107 times [2021-05-03 17:13:58,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:13:58,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982366523] [2021-05-03 17:13:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:13:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:13:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:13:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982366523] [2021-05-03 17:13:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050429073] [2021-05-03 17:13:59,007 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 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 [2021-05-03 17:13:59,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:13:59,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:13:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:13:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:13:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:13:59,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:13:59,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 17:13:59,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369751579] [2021-05-03 17:13:59,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:13:59,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:13:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:13:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:13:59,605 INFO L87 Difference]: Start difference. First operand 13545 states and 52459 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:02,857 INFO L93 Difference]: Finished difference Result 19245 states and 69750 transitions. [2021-05-03 17:14:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 17:14:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:02,927 INFO L225 Difference]: With dead ends: 19245 [2021-05-03 17:14:02,927 INFO L226 Difference]: Without dead ends: 19230 [2021-05-03 17:14:02,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2050.0ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:14:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2021-05-03 17:14:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 13512. [2021-05-03 17:14:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13512 states, 13511 states have (on average 3.872030197616757) internal successors, (52315), 13511 states have internal predecessors, (52315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 52315 transitions. [2021-05-03 17:14:03,404 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 52315 transitions. Word has length 28 [2021-05-03 17:14:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:03,404 INFO L480 AbstractCegarLoop]: Abstraction has 13512 states and 52315 transitions. [2021-05-03 17:14:03,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 52315 transitions. [2021-05-03 17:14:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:03,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:03,441 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:03,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-05-03 17:14:03,657 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 108 times [2021-05-03 17:14:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:03,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807238289] [2021-05-03 17:14:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:03,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807238289] [2021-05-03 17:14:03,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930026936] [2021-05-03 17:14:03,785 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 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 [2021-05-03 17:14:03,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:14:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:03,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:04,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:04,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 17:14:04,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883540017] [2021-05-03 17:14:04,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:14:04,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:14:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:14:04,341 INFO L87 Difference]: Start difference. First operand 13512 states and 52315 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:06,932 INFO L93 Difference]: Finished difference Result 21572 states and 78297 transitions. [2021-05-03 17:14:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 17:14:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:07,011 INFO L225 Difference]: With dead ends: 21572 [2021-05-03 17:14:07,011 INFO L226 Difference]: Without dead ends: 21559 [2021-05-03 17:14:07,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1453.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 17:14:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21559 states. [2021-05-03 17:14:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21559 to 13594. [2021-05-03 17:14:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13594 states, 13593 states have (on average 3.877731185168837) internal successors, (52710), 13593 states have internal predecessors, (52710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13594 states to 13594 states and 52710 transitions. [2021-05-03 17:14:07,539 INFO L78 Accepts]: Start accepts. Automaton has 13594 states and 52710 transitions. Word has length 28 [2021-05-03 17:14:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:07,539 INFO L480 AbstractCegarLoop]: Abstraction has 13594 states and 52710 transitions. [2021-05-03 17:14:07,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 13594 states and 52710 transitions. [2021-05-03 17:14:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:07,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:07,567 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:07,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-05-03 17:14:07,768 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 109 times [2021-05-03 17:14:07,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:07,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110872851] [2021-05-03 17:14:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:07,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110872851] [2021-05-03 17:14:07,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322461055] [2021-05-03 17:14:07,892 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 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 [2021-05-03 17:14:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:08,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:08,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 17:14:08,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810834870] [2021-05-03 17:14:08,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:14:08,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:08,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:14:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:14:08,410 INFO L87 Difference]: Start difference. First operand 13594 states and 52710 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:11,500 INFO L93 Difference]: Finished difference Result 22871 states and 82348 transitions. [2021-05-03 17:14:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 17:14:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:11,575 INFO L225 Difference]: With dead ends: 22871 [2021-05-03 17:14:11,575 INFO L226 Difference]: Without dead ends: 22871 [2021-05-03 17:14:11,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1959.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 17:14:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2021-05-03 17:14:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 13618. [2021-05-03 17:14:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13617 states have (on average 3.8742748035543806) internal successors, (52756), 13617 states have internal predecessors, (52756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 52756 transitions. [2021-05-03 17:14:12,111 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 52756 transitions. Word has length 28 [2021-05-03 17:14:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:12,111 INFO L480 AbstractCegarLoop]: Abstraction has 13618 states and 52756 transitions. [2021-05-03 17:14:12,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 52756 transitions. [2021-05-03 17:14:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:12,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:12,140 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:12,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-05-03 17:14:12,341 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 79 times [2021-05-03 17:14:12,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:12,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543020817] [2021-05-03 17:14:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:12,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543020817] [2021-05-03 17:14:12,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78361394] [2021-05-03 17:14:12,497 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 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 [2021-05-03 17:14:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:14:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:12,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:12,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-05-03 17:14:12,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742736803] [2021-05-03 17:14:12,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:14:12,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:14:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:14:12,974 INFO L87 Difference]: Start difference. First operand 13618 states and 52756 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:16,958 INFO L93 Difference]: Finished difference Result 23672 states and 87338 transitions. [2021-05-03 17:14:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 17:14:16,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:17,041 INFO L225 Difference]: With dead ends: 23672 [2021-05-03 17:14:17,041 INFO L226 Difference]: Without dead ends: 23668 [2021-05-03 17:14:17,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2399.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 17:14:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23668 states. [2021-05-03 17:14:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23668 to 13914. [2021-05-03 17:14:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 13913 states have (on average 3.862718320994753) internal successors, (53742), 13913 states have internal predecessors, (53742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 53742 transitions. [2021-05-03 17:14:17,679 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 53742 transitions. Word has length 28 [2021-05-03 17:14:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:17,679 INFO L480 AbstractCegarLoop]: Abstraction has 13914 states and 53742 transitions. [2021-05-03 17:14:17,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 53742 transitions. [2021-05-03 17:14:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:17,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:17,712 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:17,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:14:17,913 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 110 times [2021-05-03 17:14:17,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:17,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437182885] [2021-05-03 17:14:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:18,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437182885] [2021-05-03 17:14:18,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964985375] [2021-05-03 17:14:18,033 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 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 [2021-05-03 17:14:18,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:14:18,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:18,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:18,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:18,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:14:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538024661] [2021-05-03 17:14:18,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:14:18,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:18,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:14:18,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:14:18,505 INFO L87 Difference]: Start difference. First operand 13914 states and 53742 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:21,206 INFO L93 Difference]: Finished difference Result 20142 states and 74157 transitions. [2021-05-03 17:14:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 17:14:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:21,278 INFO L225 Difference]: With dead ends: 20142 [2021-05-03 17:14:21,278 INFO L226 Difference]: Without dead ends: 20119 [2021-05-03 17:14:21,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1567.3ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:14:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20119 states. [2021-05-03 17:14:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20119 to 13940. [2021-05-03 17:14:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13940 states, 13939 states have (on average 3.8696463160915417) internal successors, (53939), 13939 states have internal predecessors, (53939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13940 states to 13940 states and 53939 transitions. [2021-05-03 17:14:21,736 INFO L78 Accepts]: Start accepts. Automaton has 13940 states and 53939 transitions. Word has length 28 [2021-05-03 17:14:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:21,736 INFO L480 AbstractCegarLoop]: Abstraction has 13940 states and 53939 transitions. [2021-05-03 17:14:21,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 13940 states and 53939 transitions. [2021-05-03 17:14:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:21,771 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:21,771 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:21,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-05-03 17:14:21,973 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:21,973 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 111 times [2021-05-03 17:14:21,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:21,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634013537] [2021-05-03 17:14:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:22,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634013537] [2021-05-03 17:14:22,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908755413] [2021-05-03 17:14:22,122 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 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 [2021-05-03 17:14:22,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:14:22,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:22,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:22,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:22,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:22,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:14:22,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655096795] [2021-05-03 17:14:22,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:14:22,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:14:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:14:22,591 INFO L87 Difference]: Start difference. First operand 13940 states and 53939 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:26,025 INFO L93 Difference]: Finished difference Result 19597 states and 71188 transitions. [2021-05-03 17:14:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:14:26,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:26,067 INFO L225 Difference]: With dead ends: 19597 [2021-05-03 17:14:26,067 INFO L226 Difference]: Without dead ends: 19597 [2021-05-03 17:14:26,067 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2125.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 17:14:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-05-03 17:14:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 13893. [2021-05-03 17:14:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13893 states, 13892 states have (on average 3.8620069104520587) internal successors, (53651), 13892 states have internal predecessors, (53651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13893 states to 13893 states and 53651 transitions. [2021-05-03 17:14:26,490 INFO L78 Accepts]: Start accepts. Automaton has 13893 states and 53651 transitions. Word has length 28 [2021-05-03 17:14:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:26,491 INFO L480 AbstractCegarLoop]: Abstraction has 13893 states and 53651 transitions. [2021-05-03 17:14:26,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 13893 states and 53651 transitions. [2021-05-03 17:14:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:26,523 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:26,523 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:26,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-05-03 17:14:26,737 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 112 times [2021-05-03 17:14:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:26,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163558565] [2021-05-03 17:14:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:26,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163558565] [2021-05-03 17:14:26,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616502196] [2021-05-03 17:14:26,978 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 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 [2021-05-03 17:14:27,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:14:27,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:27,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:27,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:27,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 17:14:27,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823619502] [2021-05-03 17:14:27,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:14:27,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:14:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:14:27,492 INFO L87 Difference]: Start difference. First operand 13893 states and 53651 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:30,404 INFO L93 Difference]: Finished difference Result 20900 states and 76357 transitions. [2021-05-03 17:14:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 17:14:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:30,475 INFO L225 Difference]: With dead ends: 20900 [2021-05-03 17:14:30,475 INFO L226 Difference]: Without dead ends: 20900 [2021-05-03 17:14:30,475 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1816.4ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:14:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20900 states. [2021-05-03 17:14:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20900 to 14606. [2021-05-03 17:14:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 3.848134200616227) internal successors, (56202), 14605 states have internal predecessors, (56202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 56202 transitions. [2021-05-03 17:14:30,901 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 56202 transitions. Word has length 28 [2021-05-03 17:14:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:30,902 INFO L480 AbstractCegarLoop]: Abstraction has 14606 states and 56202 transitions. [2021-05-03 17:14:30,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 56202 transitions. [2021-05-03 17:14:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:30,933 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:30,933 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:31,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:14:31,133 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:31,134 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 113 times [2021-05-03 17:14:31,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:31,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638932800] [2021-05-03 17:14:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:31,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638932800] [2021-05-03 17:14:31,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703835627] [2021-05-03 17:14:31,279 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 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 [2021-05-03 17:14:31,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:14:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:31,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:31,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:31,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 17:14:31,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795394272] [2021-05-03 17:14:31,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:14:31,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:14:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:14:31,787 INFO L87 Difference]: Start difference. First operand 14606 states and 56202 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:35,657 INFO L93 Difference]: Finished difference Result 23435 states and 84344 transitions. [2021-05-03 17:14:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:14:35,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:35,738 INFO L225 Difference]: With dead ends: 23435 [2021-05-03 17:14:35,738 INFO L226 Difference]: Without dead ends: 23435 [2021-05-03 17:14:35,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 2302.9ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 17:14:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23435 states. [2021-05-03 17:14:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23435 to 14836. [2021-05-03 17:14:36,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 3.8591843613077184) internal successors, (57251), 14835 states have internal predecessors, (57251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 57251 transitions. [2021-05-03 17:14:36,256 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 57251 transitions. Word has length 28 [2021-05-03 17:14:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:36,256 INFO L480 AbstractCegarLoop]: Abstraction has 14836 states and 57251 transitions. [2021-05-03 17:14:36,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 57251 transitions. [2021-05-03 17:14:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:36,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:36,293 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:36,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-05-03 17:14:36,513 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 80 times [2021-05-03 17:14:36,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:36,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337818687] [2021-05-03 17:14:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:36,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337818687] [2021-05-03 17:14:36,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713858917] [2021-05-03 17:14:36,718 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 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 [2021-05-03 17:14:36,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:14:36,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:14:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:37,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:37,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:14:37,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798655150] [2021-05-03 17:14:37,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:14:37,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:14:37,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:14:37,475 INFO L87 Difference]: Start difference. First operand 14836 states and 57251 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:43,844 INFO L93 Difference]: Finished difference Result 41598 states and 149527 transitions. [2021-05-03 17:14:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 17:14:43,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:43,985 INFO L225 Difference]: With dead ends: 41598 [2021-05-03 17:14:43,985 INFO L226 Difference]: Without dead ends: 41598 [2021-05-03 17:14:43,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 4242.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 17:14:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41598 states. [2021-05-03 17:14:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41598 to 16192. [2021-05-03 17:14:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16192 states, 16191 states have (on average 3.905564819961707) internal successors, (63235), 16191 states have internal predecessors, (63235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16192 states to 16192 states and 63235 transitions. [2021-05-03 17:14:44,885 INFO L78 Accepts]: Start accepts. Automaton has 16192 states and 63235 transitions. Word has length 28 [2021-05-03 17:14:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:44,886 INFO L480 AbstractCegarLoop]: Abstraction has 16192 states and 63235 transitions. [2021-05-03 17:14:44,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 16192 states and 63235 transitions. [2021-05-03 17:14:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:44,919 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:44,919 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:45,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:14:45,129 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 81 times [2021-05-03 17:14:45,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:45,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378049538] [2021-05-03 17:14:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:45,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378049538] [2021-05-03 17:14:45,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637922166] [2021-05-03 17:14:45,366 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 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 [2021-05-03 17:14:45,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 17:14:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:14:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:46,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:46,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:14:46,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325403021] [2021-05-03 17:14:46,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:14:46,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:46,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:14:46,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:14:46,047 INFO L87 Difference]: Start difference. First operand 16192 states and 63235 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:52,827 INFO L93 Difference]: Finished difference Result 40544 states and 146786 transitions. [2021-05-03 17:14:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 17:14:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:52,985 INFO L225 Difference]: With dead ends: 40544 [2021-05-03 17:14:52,986 INFO L226 Difference]: Without dead ends: 40544 [2021-05-03 17:14:52,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 4623.6ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 17:14:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40544 states. [2021-05-03 17:14:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40544 to 16160. [2021-05-03 17:14:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16160 states, 16159 states have (on average 3.9019122470449905) internal successors, (63051), 16159 states have internal predecessors, (63051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16160 states to 16160 states and 63051 transitions. [2021-05-03 17:14:53,983 INFO L78 Accepts]: Start accepts. Automaton has 16160 states and 63051 transitions. Word has length 28 [2021-05-03 17:14:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:53,983 INFO L480 AbstractCegarLoop]: Abstraction has 16160 states and 63051 transitions. [2021-05-03 17:14:53,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16160 states and 63051 transitions. [2021-05-03 17:14:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:54,023 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:54,024 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:54,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-05-03 17:14:54,237 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 114 times [2021-05-03 17:14:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:54,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222375570] [2021-05-03 17:14:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:54,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222375570] [2021-05-03 17:14:54,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387813697] [2021-05-03 17:14:54,424 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 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 [2021-05-03 17:14:54,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:14:54,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:54,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:54,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:54,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:54,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:14:54,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662072518] [2021-05-03 17:14:54,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:14:54,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:14:54,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:14:54,905 INFO L87 Difference]: Start difference. First operand 16160 states and 63051 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:56,155 INFO L93 Difference]: Finished difference Result 25110 states and 96518 transitions. [2021-05-03 17:14:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:14:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:56,259 INFO L225 Difference]: With dead ends: 25110 [2021-05-03 17:14:56,259 INFO L226 Difference]: Without dead ends: 25063 [2021-05-03 17:14:56,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:14:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25063 states. [2021-05-03 17:14:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25063 to 20843. [2021-05-03 17:14:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20843 states, 20842 states have (on average 3.909125803665675) internal successors, (81474), 20842 states have internal predecessors, (81474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20843 states to 20843 states and 81474 transitions. [2021-05-03 17:14:56,876 INFO L78 Accepts]: Start accepts. Automaton has 20843 states and 81474 transitions. Word has length 28 [2021-05-03 17:14:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:56,876 INFO L480 AbstractCegarLoop]: Abstraction has 20843 states and 81474 transitions. [2021-05-03 17:14:56,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20843 states and 81474 transitions. [2021-05-03 17:14:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:56,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:56,924 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:57,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-05-03 17:14:57,125 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 115 times [2021-05-03 17:14:57,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:57,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218673095] [2021-05-03 17:14:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:57,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218673095] [2021-05-03 17:14:57,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108385033] [2021-05-03 17:14:57,291 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 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 [2021-05-03 17:14:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:14:57,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:57,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:57,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:14:57,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931413418] [2021-05-03 17:14:57,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:14:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:14:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:14:57,738 INFO L87 Difference]: Start difference. First operand 20843 states and 81474 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:58,715 INFO L93 Difference]: Finished difference Result 23598 states and 89846 transitions. [2021-05-03 17:14:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:14:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:14:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:58,937 INFO L225 Difference]: With dead ends: 23598 [2021-05-03 17:14:58,938 INFO L226 Difference]: Without dead ends: 23598 [2021-05-03 17:14:58,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:14:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23598 states. [2021-05-03 17:14:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23598 to 20346. [2021-05-03 17:14:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20346 states, 20345 states have (on average 3.8978618825264193) internal successors, (79302), 20345 states have internal predecessors, (79302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20346 states to 20346 states and 79302 transitions. [2021-05-03 17:14:59,509 INFO L78 Accepts]: Start accepts. Automaton has 20346 states and 79302 transitions. Word has length 28 [2021-05-03 17:14:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:59,509 INFO L480 AbstractCegarLoop]: Abstraction has 20346 states and 79302 transitions. [2021-05-03 17:14:59,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 20346 states and 79302 transitions. [2021-05-03 17:14:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:14:59,559 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:59,559 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:59,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-05-03 17:14:59,760 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:59,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:59,760 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 116 times [2021-05-03 17:14:59,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:59,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192892622] [2021-05-03 17:14:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:59,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192892622] [2021-05-03 17:14:59,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935983281] [2021-05-03 17:14:59,849 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 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 [2021-05-03 17:14:59,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:14:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:14:59,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:00,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:00,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-03 17:15:00,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565759153] [2021-05-03 17:15:00,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:15:00,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:15:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:15:00,193 INFO L87 Difference]: Start difference. First operand 20346 states and 79302 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:02,742 INFO L93 Difference]: Finished difference Result 32302 states and 119801 transitions. [2021-05-03 17:15:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:15:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:02,840 INFO L225 Difference]: With dead ends: 32302 [2021-05-03 17:15:02,840 INFO L226 Difference]: Without dead ends: 32302 [2021-05-03 17:15:02,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1502.0ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 17:15:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32302 states. [2021-05-03 17:15:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32302 to 20412. [2021-05-03 17:15:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20412 states, 20411 states have (on average 3.895938464553427) internal successors, (79520), 20411 states have internal predecessors, (79520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20412 states to 20412 states and 79520 transitions. [2021-05-03 17:15:03,559 INFO L78 Accepts]: Start accepts. Automaton has 20412 states and 79520 transitions. Word has length 28 [2021-05-03 17:15:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:03,559 INFO L480 AbstractCegarLoop]: Abstraction has 20412 states and 79520 transitions. [2021-05-03 17:15:03,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 20412 states and 79520 transitions. [2021-05-03 17:15:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:03,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:03,594 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:03,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-03 17:15:03,809 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 117 times [2021-05-03 17:15:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:03,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45611412] [2021-05-03 17:15:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:03,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45611412] [2021-05-03 17:15:03,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745432091] [2021-05-03 17:15:03,940 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 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 [2021-05-03 17:15:03,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:15:03,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:04,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:04,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 17:15:04,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813985831] [2021-05-03 17:15:04,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:15:04,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:04,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:15:04,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:15:04,384 INFO L87 Difference]: Start difference. First operand 20412 states and 79520 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:09,510 INFO L93 Difference]: Finished difference Result 41452 states and 151987 transitions. [2021-05-03 17:15:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-03 17:15:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:09,630 INFO L225 Difference]: With dead ends: 41452 [2021-05-03 17:15:09,630 INFO L226 Difference]: Without dead ends: 41452 [2021-05-03 17:15:09,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 3169.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 17:15:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41452 states. [2021-05-03 17:15:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41452 to 20417. [2021-05-03 17:15:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20417 states, 20416 states have (on average 3.8979721786833856) internal successors, (79581), 20416 states have internal predecessors, (79581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20417 states to 20417 states and 79581 transitions. [2021-05-03 17:15:10,485 INFO L78 Accepts]: Start accepts. Automaton has 20417 states and 79581 transitions. Word has length 28 [2021-05-03 17:15:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:10,485 INFO L480 AbstractCegarLoop]: Abstraction has 20417 states and 79581 transitions. [2021-05-03 17:15:10,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:10,485 INFO L276 IsEmpty]: Start isEmpty. Operand 20417 states and 79581 transitions. [2021-05-03 17:15:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:10,520 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:10,520 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:10,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:15:10,721 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 118 times [2021-05-03 17:15:10,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:10,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288091869] [2021-05-03 17:15:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288091869] [2021-05-03 17:15:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542482663] [2021-05-03 17:15:10,834 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 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 [2021-05-03 17:15:10,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:15:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:11,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:11,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 17:15:11,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811279272] [2021-05-03 17:15:11,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:15:11,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:15:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:15:11,303 INFO L87 Difference]: Start difference. First operand 20417 states and 79581 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:16,147 INFO L93 Difference]: Finished difference Result 41128 states and 151472 transitions. [2021-05-03 17:15:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 17:15:16,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:16,279 INFO L225 Difference]: With dead ends: 41128 [2021-05-03 17:15:16,279 INFO L226 Difference]: Without dead ends: 41128 [2021-05-03 17:15:16,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 3288.4ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 17:15:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41128 states. [2021-05-03 17:15:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41128 to 20205. [2021-05-03 17:15:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20205 states, 20204 states have (on average 3.8903187487626214) internal successors, (78600), 20204 states have internal predecessors, (78600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20205 states to 20205 states and 78600 transitions. [2021-05-03 17:15:17,036 INFO L78 Accepts]: Start accepts. Automaton has 20205 states and 78600 transitions. Word has length 28 [2021-05-03 17:15:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:17,036 INFO L480 AbstractCegarLoop]: Abstraction has 20205 states and 78600 transitions. [2021-05-03 17:15:17,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 20205 states and 78600 transitions. [2021-05-03 17:15:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:17,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:17,071 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:17,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-05-03 17:15:17,272 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:17,272 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 119 times [2021-05-03 17:15:17,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:17,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611928881] [2021-05-03 17:15:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611928881] [2021-05-03 17:15:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134192761] [2021-05-03 17:15:17,364 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 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 [2021-05-03 17:15:17,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:15:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:17,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:15:17,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:15:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-03 17:15:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315022802] [2021-05-03 17:15:17,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:15:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:15:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:15:17,608 INFO L87 Difference]: Start difference. First operand 20205 states and 78600 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:18,440 INFO L93 Difference]: Finished difference Result 29714 states and 111113 transitions. [2021-05-03 17:15:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:15:18,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:18,531 INFO L225 Difference]: With dead ends: 29714 [2021-05-03 17:15:18,531 INFO L226 Difference]: Without dead ends: 29697 [2021-05-03 17:15:18,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:15:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29697 states. [2021-05-03 17:15:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29697 to 20476. [2021-05-03 17:15:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20476 states, 20475 states have (on average 3.895775335775336) internal successors, (79766), 20475 states have internal predecessors, (79766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20476 states to 20476 states and 79766 transitions. [2021-05-03 17:15:19,214 INFO L78 Accepts]: Start accepts. Automaton has 20476 states and 79766 transitions. Word has length 28 [2021-05-03 17:15:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:19,214 INFO L480 AbstractCegarLoop]: Abstraction has 20476 states and 79766 transitions. [2021-05-03 17:15:19,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20476 states and 79766 transitions. [2021-05-03 17:15:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:19,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:19,253 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:19,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:15:19,454 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 120 times [2021-05-03 17:15:19,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:19,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180706998] [2021-05-03 17:15:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:19,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180706998] [2021-05-03 17:15:19,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23651071] [2021-05-03 17:15:19,557 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 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 [2021-05-03 17:15:19,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:15:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:15:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:15:19,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:19,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-03 17:15:19,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392577823] [2021-05-03 17:15:19,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:15:19,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:15:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:15:19,861 INFO L87 Difference]: Start difference. First operand 20476 states and 79766 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:20,562 INFO L93 Difference]: Finished difference Result 31499 states and 116678 transitions. [2021-05-03 17:15:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 17:15:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:20,660 INFO L225 Difference]: With dead ends: 31499 [2021-05-03 17:15:20,660 INFO L226 Difference]: Without dead ends: 31499 [2021-05-03 17:15:20,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:15:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31499 states. [2021-05-03 17:15:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31499 to 20145. [2021-05-03 17:15:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20145 states, 20144 states have (on average 3.8810563939634632) internal successors, (78180), 20144 states have internal predecessors, (78180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20145 states to 20145 states and 78180 transitions. [2021-05-03 17:15:21,316 INFO L78 Accepts]: Start accepts. Automaton has 20145 states and 78180 transitions. Word has length 28 [2021-05-03 17:15:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:21,316 INFO L480 AbstractCegarLoop]: Abstraction has 20145 states and 78180 transitions. [2021-05-03 17:15:21,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20145 states and 78180 transitions. [2021-05-03 17:15:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:21,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:21,358 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:21,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-05-03 17:15:21,573 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 121 times [2021-05-03 17:15:21,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:21,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933376359] [2021-05-03 17:15:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:21,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933376359] [2021-05-03 17:15:21,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538823036] [2021-05-03 17:15:21,703 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 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 [2021-05-03 17:15:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:22,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:22,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 17:15:22,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614784771] [2021-05-03 17:15:22,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:15:22,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:22,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:15:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:15:22,199 INFO L87 Difference]: Start difference. First operand 20145 states and 78180 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:24,659 INFO L93 Difference]: Finished difference Result 29825 states and 110934 transitions. [2021-05-03 17:15:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 17:15:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:24,748 INFO L225 Difference]: With dead ends: 29825 [2021-05-03 17:15:24,748 INFO L226 Difference]: Without dead ends: 29825 [2021-05-03 17:15:24,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1553.0ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:15:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29825 states. [2021-05-03 17:15:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29825 to 20193. [2021-05-03 17:15:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20193 states, 20192 states have (on average 3.879457210776545) internal successors, (78334), 20192 states have internal predecessors, (78334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20193 states to 20193 states and 78334 transitions. [2021-05-03 17:15:25,358 INFO L78 Accepts]: Start accepts. Automaton has 20193 states and 78334 transitions. Word has length 28 [2021-05-03 17:15:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:25,358 INFO L480 AbstractCegarLoop]: Abstraction has 20193 states and 78334 transitions. [2021-05-03 17:15:25,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 20193 states and 78334 transitions. [2021-05-03 17:15:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:25,390 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:25,390 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:25,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:15:25,598 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 122 times [2021-05-03 17:15:25,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:25,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104088849] [2021-05-03 17:15:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:25,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104088849] [2021-05-03 17:15:25,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372215298] [2021-05-03 17:15:25,711 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 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 [2021-05-03 17:15:25,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:15:25,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:25,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:26,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:26,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 17:15:26,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826405917] [2021-05-03 17:15:26,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:15:26,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:26,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:15:26,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:15:26,030 INFO L87 Difference]: Start difference. First operand 20193 states and 78334 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:29,431 INFO L93 Difference]: Finished difference Result 31497 states and 115770 transitions. [2021-05-03 17:15:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 17:15:29,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:29,532 INFO L225 Difference]: With dead ends: 31497 [2021-05-03 17:15:29,532 INFO L226 Difference]: Without dead ends: 31497 [2021-05-03 17:15:29,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 2025.9ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 17:15:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31497 states. [2021-05-03 17:15:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31497 to 20733. [2021-05-03 17:15:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20733 states, 20732 states have (on average 3.8584796449932472) internal successors, (79994), 20732 states have internal predecessors, (79994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20733 states to 20733 states and 79994 transitions. [2021-05-03 17:15:30,221 INFO L78 Accepts]: Start accepts. Automaton has 20733 states and 79994 transitions. Word has length 28 [2021-05-03 17:15:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:30,221 INFO L480 AbstractCegarLoop]: Abstraction has 20733 states and 79994 transitions. [2021-05-03 17:15:30,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 20733 states and 79994 transitions. [2021-05-03 17:15:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:30,256 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:30,256 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:30,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:15:30,465 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 123 times [2021-05-03 17:15:30,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:30,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406977081] [2021-05-03 17:15:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:30,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406977081] [2021-05-03 17:15:30,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007656720] [2021-05-03 17:15:30,630 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 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 [2021-05-03 17:15:30,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:15:30,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:31,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:31,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 17:15:31,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979214889] [2021-05-03 17:15:31,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:15:31,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:31,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:15:31,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:15:31,047 INFO L87 Difference]: Start difference. First operand 20733 states and 79994 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:33,782 INFO L93 Difference]: Finished difference Result 30547 states and 113289 transitions. [2021-05-03 17:15:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 17:15:33,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:33,883 INFO L225 Difference]: With dead ends: 30547 [2021-05-03 17:15:33,883 INFO L226 Difference]: Without dead ends: 30543 [2021-05-03 17:15:33,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1619.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 17:15:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30543 states. [2021-05-03 17:15:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30543 to 20625. [2021-05-03 17:15:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20625 states, 20624 states have (on average 3.861132660977502) internal successors, (79632), 20624 states have internal predecessors, (79632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 79632 transitions. [2021-05-03 17:15:34,596 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 79632 transitions. Word has length 28 [2021-05-03 17:15:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:34,596 INFO L480 AbstractCegarLoop]: Abstraction has 20625 states and 79632 transitions. [2021-05-03 17:15:34,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 79632 transitions. [2021-05-03 17:15:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:34,631 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:34,631 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:34,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:15:34,831 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 124 times [2021-05-03 17:15:34,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:34,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204886185] [2021-05-03 17:15:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:34,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204886185] [2021-05-03 17:15:34,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766948376] [2021-05-03 17:15:34,942 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 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 [2021-05-03 17:15:34,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:15:34,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:34,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:15:34,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:15:35,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:35,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 17:15:35,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506846969] [2021-05-03 17:15:35,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:15:35,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:15:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:15:35,225 INFO L87 Difference]: Start difference. First operand 20625 states and 79632 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:35,822 INFO L93 Difference]: Finished difference Result 25637 states and 95562 transitions. [2021-05-03 17:15:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:15:35,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:35,900 INFO L225 Difference]: With dead ends: 25637 [2021-05-03 17:15:35,900 INFO L226 Difference]: Without dead ends: 25637 [2021-05-03 17:15:35,901 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:15:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25637 states. [2021-05-03 17:15:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25637 to 20910. [2021-05-03 17:15:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20910 states, 20909 states have (on average 3.8524080539480607) internal successors, (80550), 20909 states have internal predecessors, (80550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20910 states to 20910 states and 80550 transitions. [2021-05-03 17:15:36,451 INFO L78 Accepts]: Start accepts. Automaton has 20910 states and 80550 transitions. Word has length 28 [2021-05-03 17:15:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:36,451 INFO L480 AbstractCegarLoop]: Abstraction has 20910 states and 80550 transitions. [2021-05-03 17:15:36,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20910 states and 80550 transitions. [2021-05-03 17:15:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:36,484 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:36,485 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:36,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-03 17:15:36,685 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:36,685 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 125 times [2021-05-03 17:15:36,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:36,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430306165] [2021-05-03 17:15:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:36,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430306165] [2021-05-03 17:15:36,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827351218] [2021-05-03 17:15:36,811 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 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 [2021-05-03 17:15:36,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:15:36,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:15:37,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:37,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 17:15:37,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477862644] [2021-05-03 17:15:37,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:15:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:15:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:15:37,159 INFO L87 Difference]: Start difference. First operand 20910 states and 80550 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:39,955 INFO L93 Difference]: Finished difference Result 31417 states and 115177 transitions. [2021-05-03 17:15:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:15:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:40,070 INFO L225 Difference]: With dead ends: 31417 [2021-05-03 17:15:40,070 INFO L226 Difference]: Without dead ends: 31417 [2021-05-03 17:15:40,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1605.7ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 17:15:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31417 states. [2021-05-03 17:15:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31417 to 22542. [2021-05-03 17:15:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 3.8634488265826716) internal successors, (87086), 22541 states have internal predecessors, (87086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 87086 transitions. [2021-05-03 17:15:40,773 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 87086 transitions. Word has length 28 [2021-05-03 17:15:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:40,773 INFO L480 AbstractCegarLoop]: Abstraction has 22542 states and 87086 transitions. [2021-05-03 17:15:40,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 87086 transitions. [2021-05-03 17:15:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:40,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:40,814 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:41,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-05-03 17:15:41,021 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 126 times [2021-05-03 17:15:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:41,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233154715] [2021-05-03 17:15:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233154715] [2021-05-03 17:15:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101658406] [2021-05-03 17:15:41,188 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 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 [2021-05-03 17:15:41,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:15:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:15:41,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:41,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 17:15:41,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60408634] [2021-05-03 17:15:41,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:15:41,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:15:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:15:41,537 INFO L87 Difference]: Start difference. First operand 22542 states and 87086 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:42,863 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-03 17:15:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:44,002 INFO L93 Difference]: Finished difference Result 29674 states and 110683 transitions. [2021-05-03 17:15:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:15:44,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:15:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:44,086 INFO L225 Difference]: With dead ends: 29674 [2021-05-03 17:15:44,086 INFO L226 Difference]: Without dead ends: 29662 [2021-05-03 17:15:44,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1536.1ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 17:15:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29662 states. [2021-05-03 17:15:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29662 to 22694. [2021-05-03 17:15:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 22693 states have (on average 3.858017890979597) internal successors, (87550), 22693 states have internal predecessors, (87550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 87550 transitions. [2021-05-03 17:15:44,764 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 87550 transitions. Word has length 28 [2021-05-03 17:15:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:44,764 INFO L480 AbstractCegarLoop]: Abstraction has 22694 states and 87550 transitions. [2021-05-03 17:15:44,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 87550 transitions. [2021-05-03 17:15:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:44,806 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:44,806 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:45,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-05-03 17:15:45,022 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 127 times [2021-05-03 17:15:45,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:45,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708705790] [2021-05-03 17:15:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708705790] [2021-05-03 17:15:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127631814] [2021-05-03 17:15:45,144 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 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 [2021-05-03 17:15:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:45,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:15:45,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:15:45,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:45,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 17:15:45,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226712260] [2021-05-03 17:15:45,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:15:45,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:45,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:15:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:15:45,435 INFO L87 Difference]: Start difference. First operand 22694 states and 87550 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-05-03 17:15:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:46,448 INFO L93 Difference]: Finished difference Result 25953 states and 98507 transitions. [2021-05-03 17:15:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:15:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-05-03 17:15:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:46,551 INFO L225 Difference]: With dead ends: 25953 [2021-05-03 17:15:46,552 INFO L226 Difference]: Without dead ends: 25953 [2021-05-03 17:15:46,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:15:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25953 states. [2021-05-03 17:15:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25953 to 23497. [2021-05-03 17:15:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23497 states, 23496 states have (on average 3.852953694245829) internal successors, (90529), 23496 states have internal predecessors, (90529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23497 states to 23497 states and 90529 transitions. [2021-05-03 17:15:47,199 INFO L78 Accepts]: Start accepts. Automaton has 23497 states and 90529 transitions. Word has length 28 [2021-05-03 17:15:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:47,199 INFO L480 AbstractCegarLoop]: Abstraction has 23497 states and 90529 transitions. [2021-05-03 17:15:47,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-05-03 17:15:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23497 states and 90529 transitions. [2021-05-03 17:15:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:47,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:47,249 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:47,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-05-03 17:15:47,464 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 128 times [2021-05-03 17:15:47,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:47,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234259790] [2021-05-03 17:15:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:47,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234259790] [2021-05-03 17:15:47,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239384203] [2021-05-03 17:15:47,600 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 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 [2021-05-03 17:15:47,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:15:47,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:47,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:48,012 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-03 17:15:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:48,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:48,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 17:15:48,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487816683] [2021-05-03 17:15:48,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:15:48,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:15:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:15:48,116 INFO L87 Difference]: Start difference. First operand 23497 states and 90529 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:15:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:50,943 INFO L93 Difference]: Finished difference Result 31449 states and 116111 transitions. [2021-05-03 17:15:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 17:15:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-05-03 17:15:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:51,029 INFO L225 Difference]: With dead ends: 31449 [2021-05-03 17:15:51,029 INFO L226 Difference]: Without dead ends: 31449 [2021-05-03 17:15:51,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1716.8ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 17:15:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31449 states. [2021-05-03 17:15:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31449 to 24701. [2021-05-03 17:15:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24701 states, 24700 states have (on average 3.8202024291497976) internal successors, (94359), 24700 states have internal predecessors, (94359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24701 states to 24701 states and 94359 transitions. [2021-05-03 17:15:51,825 INFO L78 Accepts]: Start accepts. Automaton has 24701 states and 94359 transitions. Word has length 28 [2021-05-03 17:15:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:51,825 INFO L480 AbstractCegarLoop]: Abstraction has 24701 states and 94359 transitions. [2021-05-03 17:15:51,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:15:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 24701 states and 94359 transitions. [2021-05-03 17:15:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:51,875 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:51,875 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:52,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-05-03 17:15:52,090 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 129 times [2021-05-03 17:15:52,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:52,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949745492] [2021-05-03 17:15:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:52,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949745492] [2021-05-03 17:15:52,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652090811] [2021-05-03 17:15:52,212 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 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 [2021-05-03 17:15:52,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 17:15:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:52,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:52,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:15:52,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558253415] [2021-05-03 17:15:52,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:15:52,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:15:52,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:15:52,650 INFO L87 Difference]: Start difference. First operand 24701 states and 94359 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:15:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:54,452 INFO L93 Difference]: Finished difference Result 30571 states and 113768 transitions. [2021-05-03 17:15:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 17:15:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:15:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:54,624 INFO L225 Difference]: With dead ends: 30571 [2021-05-03 17:15:54,624 INFO L226 Difference]: Without dead ends: 30563 [2021-05-03 17:15:54,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1097.6ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:15:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30563 states. [2021-05-03 17:15:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30563 to 24523. [2021-05-03 17:15:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24523 states, 24522 states have (on average 3.826278443846342) internal successors, (93828), 24522 states have internal predecessors, (93828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24523 states to 24523 states and 93828 transitions. [2021-05-03 17:15:55,221 INFO L78 Accepts]: Start accepts. Automaton has 24523 states and 93828 transitions. Word has length 28 [2021-05-03 17:15:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:55,221 INFO L480 AbstractCegarLoop]: Abstraction has 24523 states and 93828 transitions. [2021-05-03 17:15:55,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:15:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24523 states and 93828 transitions. [2021-05-03 17:15:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:55,261 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:55,261 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:55,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:15:55,476 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:55,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 130 times [2021-05-03 17:15:55,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:55,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663067447] [2021-05-03 17:15:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:55,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663067447] [2021-05-03 17:15:55,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289148548] [2021-05-03 17:15:55,587 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 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 [2021-05-03 17:15:55,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:15:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:55,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:15:55,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:55,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:55,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:15:55,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825202922] [2021-05-03 17:15:55,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:15:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:15:55,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:15:55,877 INFO L87 Difference]: Start difference. First operand 24523 states and 93828 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:15:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:15:58,342 INFO L93 Difference]: Finished difference Result 32405 states and 119336 transitions. [2021-05-03 17:15:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 17:15:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:15:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:15:58,436 INFO L225 Difference]: With dead ends: 32405 [2021-05-03 17:15:58,437 INFO L226 Difference]: Without dead ends: 32405 [2021-05-03 17:15:58,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1421.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 17:15:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32405 states. [2021-05-03 17:15:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32405 to 25505. [2021-05-03 17:15:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.802423149309912) internal successors, (96977), 25504 states have internal predecessors, (96977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:15:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 96977 transitions. [2021-05-03 17:15:59,307 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 96977 transitions. Word has length 28 [2021-05-03 17:15:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:15:59,307 INFO L480 AbstractCegarLoop]: Abstraction has 25505 states and 96977 transitions. [2021-05-03 17:15:59,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:15:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 96977 transitions. [2021-05-03 17:15:59,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:15:59,349 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:15:59,349 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:15:59,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-05-03 17:15:59,550 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:15:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:15:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 131 times [2021-05-03 17:15:59,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:15:59,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174636948] [2021-05-03 17:15:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:15:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:15:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:59,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174636948] [2021-05-03 17:15:59,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131849207] [2021-05-03 17:15:59,656 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 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 [2021-05-03 17:15:59,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:15:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:15:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:15:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:15:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:15:59,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:15:59,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-03 17:15:59,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352351078] [2021-05-03 17:15:59,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:15:59,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:15:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:15:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:15:59,953 INFO L87 Difference]: Start difference. First operand 25505 states and 96977 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:01,020 INFO L93 Difference]: Finished difference Result 31168 states and 117592 transitions. [2021-05-03 17:16:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:16:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:01,101 INFO L225 Difference]: With dead ends: 31168 [2021-05-03 17:16:01,101 INFO L226 Difference]: Without dead ends: 31155 [2021-05-03 17:16:01,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:16:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31155 states. [2021-05-03 17:16:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31155 to 29628. [2021-05-03 17:16:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29628 states, 29627 states have (on average 3.819927768589462) internal successors, (113173), 29627 states have internal predecessors, (113173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29628 states to 29628 states and 113173 transitions. [2021-05-03 17:16:01,844 INFO L78 Accepts]: Start accepts. Automaton has 29628 states and 113173 transitions. Word has length 28 [2021-05-03 17:16:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:01,844 INFO L480 AbstractCegarLoop]: Abstraction has 29628 states and 113173 transitions. [2021-05-03 17:16:01,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29628 states and 113173 transitions. [2021-05-03 17:16:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:01,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:01,901 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:02,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:02,102 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 132 times [2021-05-03 17:16:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:02,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050836905] [2021-05-03 17:16:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:02,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050836905] [2021-05-03 17:16:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455823397] [2021-05-03 17:16:02,193 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 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 [2021-05-03 17:16:02,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:16:02,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:16:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:02,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:02,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-03 17:16:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133101684] [2021-05-03 17:16:02,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:16:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:16:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:16:02,468 INFO L87 Difference]: Start difference. First operand 29628 states and 113173 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:03,695 INFO L93 Difference]: Finished difference Result 32631 states and 122504 transitions. [2021-05-03 17:16:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:16:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:03,788 INFO L225 Difference]: With dead ends: 32631 [2021-05-03 17:16:03,788 INFO L226 Difference]: Without dead ends: 32631 [2021-05-03 17:16:03,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 471.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:16:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32631 states. [2021-05-03 17:16:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32631 to 29373. [2021-05-03 17:16:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29373 states, 29372 states have (on average 3.816355712923873) internal successors, (112094), 29372 states have internal predecessors, (112094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29373 states to 29373 states and 112094 transitions. [2021-05-03 17:16:04,593 INFO L78 Accepts]: Start accepts. Automaton has 29373 states and 112094 transitions. Word has length 28 [2021-05-03 17:16:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:04,593 INFO L480 AbstractCegarLoop]: Abstraction has 29373 states and 112094 transitions. [2021-05-03 17:16:04,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 29373 states and 112094 transitions. [2021-05-03 17:16:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:04,647 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:04,647 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:04,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:04,847 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:04,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 133 times [2021-05-03 17:16:04,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:04,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530523896] [2021-05-03 17:16:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:04,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530523896] [2021-05-03 17:16:04,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522021690] [2021-05-03 17:16:04,992 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 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 [2021-05-03 17:16:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:05,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:05,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:16:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242424075] [2021-05-03 17:16:05,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:16:05,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:16:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:16:05,289 INFO L87 Difference]: Start difference. First operand 29373 states and 112094 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:16:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:07,452 INFO L93 Difference]: Finished difference Result 35986 states and 133856 transitions. [2021-05-03 17:16:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 17:16:07,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:16:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:07,564 INFO L225 Difference]: With dead ends: 35986 [2021-05-03 17:16:07,564 INFO L226 Difference]: Without dead ends: 35978 [2021-05-03 17:16:07,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1119.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 17:16:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35978 states. [2021-05-03 17:16:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35978 to 29339. [2021-05-03 17:16:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29339 states, 29338 states have (on average 3.8167905106005864) internal successors, (111977), 29338 states have internal predecessors, (111977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29339 states to 29339 states and 111977 transitions. [2021-05-03 17:16:08,465 INFO L78 Accepts]: Start accepts. Automaton has 29339 states and 111977 transitions. Word has length 28 [2021-05-03 17:16:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:08,466 INFO L480 AbstractCegarLoop]: Abstraction has 29339 states and 111977 transitions. [2021-05-03 17:16:08,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:16:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29339 states and 111977 transitions. [2021-05-03 17:16:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:08,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:08,521 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:08,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:08,722 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 134 times [2021-05-03 17:16:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:08,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926363329] [2021-05-03 17:16:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:16:08,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926363329] [2021-05-03 17:16:08,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352592592] [2021-05-03 17:16:08,855 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 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 [2021-05-03 17:16:08,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:16:08,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:16:08,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:16:09,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:09,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-03 17:16:09,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413418692] [2021-05-03 17:16:09,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:16:09,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:09,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:16:09,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:16:09,216 INFO L87 Difference]: Start difference. First operand 29339 states and 111977 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:10,754 INFO L93 Difference]: Finished difference Result 32185 states and 121439 transitions. [2021-05-03 17:16:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 17:16:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:10,862 INFO L225 Difference]: With dead ends: 32185 [2021-05-03 17:16:10,862 INFO L226 Difference]: Without dead ends: 32185 [2021-05-03 17:16:10,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:16:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32185 states. [2021-05-03 17:16:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32185 to 29871. [2021-05-03 17:16:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29871 states, 29870 states have (on average 3.8152326749246734) internal successors, (113961), 29870 states have internal predecessors, (113961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29871 states to 29871 states and 113961 transitions. [2021-05-03 17:16:11,657 INFO L78 Accepts]: Start accepts. Automaton has 29871 states and 113961 transitions. Word has length 28 [2021-05-03 17:16:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:11,657 INFO L480 AbstractCegarLoop]: Abstraction has 29871 states and 113961 transitions. [2021-05-03 17:16:11,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 29871 states and 113961 transitions. [2021-05-03 17:16:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:11,723 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:11,723 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:11,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:11,938 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 135 times [2021-05-03 17:16:11,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:11,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384936997] [2021-05-03 17:16:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:16:12,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384936997] [2021-05-03 17:16:12,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816499197] [2021-05-03 17:16:12,087 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 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 [2021-05-03 17:16:12,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:16:12,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:12,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:12,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:16:12,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:12,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 17:16:12,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652039689] [2021-05-03 17:16:12,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:16:12,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:16:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:16:12,424 INFO L87 Difference]: Start difference. First operand 29871 states and 113961 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:16:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:14,727 INFO L93 Difference]: Finished difference Result 36821 states and 137037 transitions. [2021-05-03 17:16:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 17:16:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-05-03 17:16:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:14,834 INFO L225 Difference]: With dead ends: 36821 [2021-05-03 17:16:14,834 INFO L226 Difference]: Without dead ends: 36797 [2021-05-03 17:16:14,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1257.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 17:16:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36797 states. [2021-05-03 17:16:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36797 to 30043. [2021-05-03 17:16:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30043 states, 30042 states have (on average 3.811164369882165) internal successors, (114495), 30042 states have internal predecessors, (114495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30043 states to 30043 states and 114495 transitions. [2021-05-03 17:16:15,691 INFO L78 Accepts]: Start accepts. Automaton has 30043 states and 114495 transitions. Word has length 28 [2021-05-03 17:16:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:15,692 INFO L480 AbstractCegarLoop]: Abstraction has 30043 states and 114495 transitions. [2021-05-03 17:16:15,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-05-03 17:16:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 30043 states and 114495 transitions. [2021-05-03 17:16:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:15,900 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:15,900 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:16,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-05-03 17:16:16,114 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:16,114 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 136 times [2021-05-03 17:16:16,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:16,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124295030] [2021-05-03 17:16:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:16,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124295030] [2021-05-03 17:16:16,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440695866] [2021-05-03 17:16:16,280 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:16:16,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:16:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 17:16:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:16,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:16,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-03 17:16:16,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619750421] [2021-05-03 17:16:16,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:16:16,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:16:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:16:16,603 INFO L87 Difference]: Start difference. First operand 30043 states and 114495 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:18,160 INFO L93 Difference]: Finished difference Result 32599 states and 122907 transitions. [2021-05-03 17:16:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:16:18,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:18,266 INFO L225 Difference]: With dead ends: 32599 [2021-05-03 17:16:18,266 INFO L226 Difference]: Without dead ends: 32599 [2021-05-03 17:16:18,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 893.8ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:16:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32599 states. [2021-05-03 17:16:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32599 to 29969. [2021-05-03 17:16:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29969 states, 29968 states have (on average 3.812032835024026) internal successors, (114239), 29968 states have internal predecessors, (114239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29969 states to 29969 states and 114239 transitions. [2021-05-03 17:16:19,179 INFO L78 Accepts]: Start accepts. Automaton has 29969 states and 114239 transitions. Word has length 28 [2021-05-03 17:16:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:19,179 INFO L480 AbstractCegarLoop]: Abstraction has 29969 states and 114239 transitions. [2021-05-03 17:16:19,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 29969 states and 114239 transitions. [2021-05-03 17:16:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:19,487 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:19,487 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:19,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-05-03 17:16:19,697 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 137 times [2021-05-03 17:16:19,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:19,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057461976] [2021-05-03 17:16:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:19,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057461976] [2021-05-03 17:16:19,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128874328] [2021-05-03 17:16:19,925 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 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 [2021-05-03 17:16:19,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:16:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:20,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:20,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 17:16:20,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145521415] [2021-05-03 17:16:20,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:16:20,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:16:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:16:20,306 INFO L87 Difference]: Start difference. First operand 29969 states and 114239 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:16:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:22,617 INFO L93 Difference]: Finished difference Result 36744 states and 136778 transitions. [2021-05-03 17:16:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 17:16:22,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-05-03 17:16:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:22,726 INFO L225 Difference]: With dead ends: 36744 [2021-05-03 17:16:22,726 INFO L226 Difference]: Without dead ends: 36704 [2021-05-03 17:16:22,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1458.1ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:16:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36704 states. [2021-05-03 17:16:23,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36704 to 30125. [2021-05-03 17:16:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30125 states, 30124 states have (on average 3.8080932147125215) internal successors, (114715), 30124 states have internal predecessors, (114715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30125 states to 30125 states and 114715 transitions. [2021-05-03 17:16:23,672 INFO L78 Accepts]: Start accepts. Automaton has 30125 states and 114715 transitions. Word has length 28 [2021-05-03 17:16:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:23,672 INFO L480 AbstractCegarLoop]: Abstraction has 30125 states and 114715 transitions. [2021-05-03 17:16:23,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-05-03 17:16:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 30125 states and 114715 transitions. [2021-05-03 17:16:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:23,728 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:23,728 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:23,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-05-03 17:16:23,928 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 138 times [2021-05-03 17:16:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:23,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21612297] [2021-05-03 17:16:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:24,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21612297] [2021-05-03 17:16:24,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064640268] [2021-05-03 17:16:24,051 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 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 [2021-05-03 17:16:24,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:16:24,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:24,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:24,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:24,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:16:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125910805] [2021-05-03 17:16:24,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:16:24,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:16:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:16:24,617 INFO L87 Difference]: Start difference. First operand 30125 states and 114715 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:28,942 INFO L93 Difference]: Finished difference Result 68801 states and 253165 transitions. [2021-05-03 17:16:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 17:16:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:29,162 INFO L225 Difference]: With dead ends: 68801 [2021-05-03 17:16:29,162 INFO L226 Difference]: Without dead ends: 68801 [2021-05-03 17:16:29,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 2586.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 17:16:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68801 states. [2021-05-03 17:16:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68801 to 37809. [2021-05-03 17:16:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37809 states, 37808 states have (on average 3.8872460854845534) internal successors, (146969), 37808 states have internal predecessors, (146969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37809 states to 37809 states and 146969 transitions. [2021-05-03 17:16:30,820 INFO L78 Accepts]: Start accepts. Automaton has 37809 states and 146969 transitions. Word has length 28 [2021-05-03 17:16:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:30,820 INFO L480 AbstractCegarLoop]: Abstraction has 37809 states and 146969 transitions. [2021-05-03 17:16:30,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 37809 states and 146969 transitions. [2021-05-03 17:16:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:30,896 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:30,896 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:31,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-05-03 17:16:31,097 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 139 times [2021-05-03 17:16:31,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:31,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858491745] [2021-05-03 17:16:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:31,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858491745] [2021-05-03 17:16:31,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783728231] [2021-05-03 17:16:31,218 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 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 [2021-05-03 17:16:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:31,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:31,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:16:31,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101666086] [2021-05-03 17:16:31,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:16:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:16:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:16:31,941 INFO L87 Difference]: Start difference. First operand 37809 states and 146969 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:36,280 INFO L93 Difference]: Finished difference Result 68217 states and 251622 transitions. [2021-05-03 17:16:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 17:16:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:36,489 INFO L225 Difference]: With dead ends: 68217 [2021-05-03 17:16:36,489 INFO L226 Difference]: Without dead ends: 68217 [2021-05-03 17:16:36,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2693.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 17:16:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68217 states. [2021-05-03 17:16:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68217 to 37806. [2021-05-03 17:16:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 3.8871842348895647) internal successors, (146955), 37805 states have internal predecessors, (146955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 146955 transitions. [2021-05-03 17:16:38,042 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 146955 transitions. Word has length 28 [2021-05-03 17:16:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:38,042 INFO L480 AbstractCegarLoop]: Abstraction has 37806 states and 146955 transitions. [2021-05-03 17:16:38,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 146955 transitions. [2021-05-03 17:16:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:38,108 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:38,108 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:38,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:38,322 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:38,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:38,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 140 times [2021-05-03 17:16:38,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:38,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772434702] [2021-05-03 17:16:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:38,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772434702] [2021-05-03 17:16:38,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236408207] [2021-05-03 17:16:38,436 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 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 [2021-05-03 17:16:38,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:16:38,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:38,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:38,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 17:16:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731794801] [2021-05-03 17:16:38,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:16:38,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:16:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:16:38,913 INFO L87 Difference]: Start difference. First operand 37806 states and 146955 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:42,893 INFO L93 Difference]: Finished difference Result 63636 states and 236045 transitions. [2021-05-03 17:16:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 17:16:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:43,093 INFO L225 Difference]: With dead ends: 63636 [2021-05-03 17:16:43,093 INFO L226 Difference]: Without dead ends: 63636 [2021-05-03 17:16:43,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2371.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 17:16:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63636 states. [2021-05-03 17:16:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63636 to 37828. [2021-05-03 17:16:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8874349009966425) internal successors, (147050), 37827 states have internal predecessors, (147050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147050 transitions. [2021-05-03 17:16:44,529 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147050 transitions. Word has length 28 [2021-05-03 17:16:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:44,529 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147050 transitions. [2021-05-03 17:16:44,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147050 transitions. [2021-05-03 17:16:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:44,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:44,605 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:44,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-05-03 17:16:44,813 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 141 times [2021-05-03 17:16:44,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:44,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490394759] [2021-05-03 17:16:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:44,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490394759] [2021-05-03 17:16:44,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123996278] [2021-05-03 17:16:44,943 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 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 [2021-05-03 17:16:44,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:16:44,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:44,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:44,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:45,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:45,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 17:16:45,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961200631] [2021-05-03 17:16:45,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:16:45,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:45,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:16:45,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:16:45,460 INFO L87 Difference]: Start difference. First operand 37828 states and 147050 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:49,359 INFO L93 Difference]: Finished difference Result 62782 states and 233841 transitions. [2021-05-03 17:16:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 17:16:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:49,559 INFO L225 Difference]: With dead ends: 62782 [2021-05-03 17:16:49,559 INFO L226 Difference]: Without dead ends: 62774 [2021-05-03 17:16:49,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 2323.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 17:16:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62774 states. [2021-05-03 17:16:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62774 to 37828. [2021-05-03 17:16:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8872762841356705) internal successors, (147044), 37827 states have internal predecessors, (147044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147044 transitions. [2021-05-03 17:16:51,067 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147044 transitions. Word has length 28 [2021-05-03 17:16:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:51,067 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147044 transitions. [2021-05-03 17:16:51,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147044 transitions. [2021-05-03 17:16:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:51,142 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:51,142 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:51,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:51,357 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 142 times [2021-05-03 17:16:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:51,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901628208] [2021-05-03 17:16:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:51,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901628208] [2021-05-03 17:16:51,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409120167] [2021-05-03 17:16:51,751 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 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 [2021-05-03 17:16:51,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:16:51,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:51,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:52,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:52,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:16:52,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648495316] [2021-05-03 17:16:52,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:16:52,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:16:52,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:16:52,235 INFO L87 Difference]: Start difference. First operand 37828 states and 147044 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:55,946 INFO L93 Difference]: Finished difference Result 62315 states and 232613 transitions. [2021-05-03 17:16:55,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 17:16:55,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:16:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:56,137 INFO L225 Difference]: With dead ends: 62315 [2021-05-03 17:16:56,137 INFO L226 Difference]: Without dead ends: 62315 [2021-05-03 17:16:56,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 2471.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 17:16:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62315 states. [2021-05-03 17:16:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62315 to 37836. [2021-05-03 17:16:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.887352980044932) internal successors, (147078), 37835 states have internal predecessors, (147078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147078 transitions. [2021-05-03 17:16:57,597 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147078 transitions. Word has length 28 [2021-05-03 17:16:57,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:57,598 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147078 transitions. [2021-05-03 17:16:57,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147078 transitions. [2021-05-03 17:16:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:16:57,668 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:57,669 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:57,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-05-03 17:16:57,869 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 143 times [2021-05-03 17:16:57,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:57,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282050560] [2021-05-03 17:16:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282050560] [2021-05-03 17:16:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028903280] [2021-05-03 17:16:57,992 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 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 [2021-05-03 17:16:58,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 17:16:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:16:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:58,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:58,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:16:58,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787492945] [2021-05-03 17:16:58,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:16:58,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:16:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:16:58,557 INFO L87 Difference]: Start difference. First operand 37836 states and 147078 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:02,090 INFO L93 Difference]: Finished difference Result 62082 states and 232029 transitions. [2021-05-03 17:17:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 17:17:02,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:02,294 INFO L225 Difference]: With dead ends: 62082 [2021-05-03 17:17:02,294 INFO L226 Difference]: Without dead ends: 62074 [2021-05-03 17:17:02,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2016.0ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 17:17:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62074 states. [2021-05-03 17:17:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62074 to 37836. [2021-05-03 17:17:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.8873001189374916) internal successors, (147076), 37835 states have internal predecessors, (147076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147076 transitions. [2021-05-03 17:17:03,850 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147076 transitions. Word has length 28 [2021-05-03 17:17:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:03,850 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147076 transitions. [2021-05-03 17:17:03,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147076 transitions. [2021-05-03 17:17:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:03,922 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:03,923 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:04,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:17:04,138 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:04,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 144 times [2021-05-03 17:17:04,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:04,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992893497] [2021-05-03 17:17:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:04,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992893497] [2021-05-03 17:17:04,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561268373] [2021-05-03 17:17:04,265 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 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 [2021-05-03 17:17:04,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:17:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:17:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:04,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:04,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-05-03 17:17:04,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738144278] [2021-05-03 17:17:04,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:17:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:17:04,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:17:04,739 INFO L87 Difference]: Start difference. First operand 37836 states and 147076 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:07,844 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-03 17:17:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:08,746 INFO L93 Difference]: Finished difference Result 61556 states and 228528 transitions. [2021-05-03 17:17:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 17:17:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:08,958 INFO L225 Difference]: With dead ends: 61556 [2021-05-03 17:17:08,958 INFO L226 Difference]: Without dead ends: 61556 [2021-05-03 17:17:08,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 2579.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 17:17:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61556 states. [2021-05-03 17:17:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61556 to 40635. [2021-05-03 17:17:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40635 states, 40634 states have (on average 3.8911748781808337) internal successors, (158114), 40634 states have internal predecessors, (158114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40635 states to 40635 states and 158114 transitions. [2021-05-03 17:17:10,587 INFO L78 Accepts]: Start accepts. Automaton has 40635 states and 158114 transitions. Word has length 28 [2021-05-03 17:17:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:10,587 INFO L480 AbstractCegarLoop]: Abstraction has 40635 states and 158114 transitions. [2021-05-03 17:17:10,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:10,587 INFO L276 IsEmpty]: Start isEmpty. Operand 40635 states and 158114 transitions. [2021-05-03 17:17:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:10,667 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:10,667 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:10,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:17:10,868 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:10,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 145 times [2021-05-03 17:17:10,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:10,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353639421] [2021-05-03 17:17:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:10,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353639421] [2021-05-03 17:17:10,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248199160] [2021-05-03 17:17:10,987 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 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 [2021-05-03 17:17:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:11,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:11,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:11,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-05-03 17:17:11,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29443607] [2021-05-03 17:17:11,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:17:11,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:17:11,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:17:11,418 INFO L87 Difference]: Start difference. First operand 40635 states and 158114 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:13,126 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-03 17:17:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:15,006 INFO L93 Difference]: Finished difference Result 61051 states and 227204 transitions. [2021-05-03 17:17:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 17:17:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:15,212 INFO L225 Difference]: With dead ends: 61051 [2021-05-03 17:17:15,212 INFO L226 Difference]: Without dead ends: 61043 [2021-05-03 17:17:15,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2183.1ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 17:17:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61043 states. [2021-05-03 17:17:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61043 to 40349. [2021-05-03 17:17:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40349 states, 40348 states have (on average 3.8968226430058492) internal successors, (157229), 40348 states have internal predecessors, (157229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40349 states to 40349 states and 157229 transitions. [2021-05-03 17:17:16,747 INFO L78 Accepts]: Start accepts. Automaton has 40349 states and 157229 transitions. Word has length 28 [2021-05-03 17:17:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:16,747 INFO L480 AbstractCegarLoop]: Abstraction has 40349 states and 157229 transitions. [2021-05-03 17:17:16,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 40349 states and 157229 transitions. [2021-05-03 17:17:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:16,822 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:16,822 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:17,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:17:17,022 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 146 times [2021-05-03 17:17:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:17,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556292091] [2021-05-03 17:17:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:17,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556292091] [2021-05-03 17:17:17,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112885714] [2021-05-03 17:17:17,138 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 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 [2021-05-03 17:17:17,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:17:17,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:17:17,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:17,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:17,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-05-03 17:17:17,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203670425] [2021-05-03 17:17:17,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:17:17,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:17,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:17:17,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:17:17,513 INFO L87 Difference]: Start difference. First operand 40349 states and 157229 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:20,299 INFO L93 Difference]: Finished difference Result 59500 states and 222919 transitions. [2021-05-03 17:17:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:17:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:20,484 INFO L225 Difference]: With dead ends: 59500 [2021-05-03 17:17:20,484 INFO L226 Difference]: Without dead ends: 59476 [2021-05-03 17:17:20,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1670.4ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:17:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59476 states. [2021-05-03 17:17:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59476 to 40255. [2021-05-03 17:17:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40255 states, 40254 states have (on average 3.896805286431162) internal successors, (156862), 40254 states have internal predecessors, (156862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40255 states to 40255 states and 156862 transitions. [2021-05-03 17:17:21,946 INFO L78 Accepts]: Start accepts. Automaton has 40255 states and 156862 transitions. Word has length 28 [2021-05-03 17:17:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:21,946 INFO L480 AbstractCegarLoop]: Abstraction has 40255 states and 156862 transitions. [2021-05-03 17:17:21,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 40255 states and 156862 transitions. [2021-05-03 17:17:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:22,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:22,020 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:22,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:17:22,221 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 147 times [2021-05-03 17:17:22,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:22,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631532964] [2021-05-03 17:17:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:17:22,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631532964] [2021-05-03 17:17:22,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876545669] [2021-05-03 17:17:22,355 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 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 [2021-05-03 17:17:22,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:17:22,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:17:22,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:22,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:22,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:22,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:17:22,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692921061] [2021-05-03 17:17:22,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:17:22,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:17:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:17:22,928 INFO L87 Difference]: Start difference. First operand 40255 states and 156862 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:26,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:26,861 INFO L93 Difference]: Finished difference Result 60726 states and 226343 transitions. [2021-05-03 17:17:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 17:17:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:27,060 INFO L225 Difference]: With dead ends: 60726 [2021-05-03 17:17:27,060 INFO L226 Difference]: Without dead ends: 60726 [2021-05-03 17:17:27,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2445.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 17:17:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60726 states. [2021-05-03 17:17:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60726 to 40351. [2021-05-03 17:17:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40351 states, 40350 states have (on average 3.8953159851301113) internal successors, (157176), 40350 states have internal predecessors, (157176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40351 states to 40351 states and 157176 transitions. [2021-05-03 17:17:28,597 INFO L78 Accepts]: Start accepts. Automaton has 40351 states and 157176 transitions. Word has length 28 [2021-05-03 17:17:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:28,597 INFO L480 AbstractCegarLoop]: Abstraction has 40351 states and 157176 transitions. [2021-05-03 17:17:28,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 40351 states and 157176 transitions. [2021-05-03 17:17:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:28,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:28,669 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:28,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-05-03 17:17:28,884 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 148 times [2021-05-03 17:17:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:28,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153168054] [2021-05-03 17:17:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:17:29,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153168054] [2021-05-03 17:17:29,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407155297] [2021-05-03 17:17:29,004 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:17:29,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:17:29,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:17:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:17:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:29,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:29,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 17:17:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908928167] [2021-05-03 17:17:29,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:17:29,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:29,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:17:29,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:17:29,453 INFO L87 Difference]: Start difference. First operand 40351 states and 157176 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:32,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:32,831 INFO L93 Difference]: Finished difference Result 60292 states and 225103 transitions. [2021-05-03 17:17:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:17:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:33,013 INFO L225 Difference]: With dead ends: 60292 [2021-05-03 17:17:33,013 INFO L226 Difference]: Without dead ends: 60284 [2021-05-03 17:17:33,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 2086.0ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 17:17:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60284 states. [2021-05-03 17:17:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60284 to 40283. [2021-05-03 17:17:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40283 states, 40282 states have (on average 3.8966287671913014) internal successors, (156964), 40282 states have internal predecessors, (156964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40283 states to 40283 states and 156964 transitions. [2021-05-03 17:17:34,558 INFO L78 Accepts]: Start accepts. Automaton has 40283 states and 156964 transitions. Word has length 28 [2021-05-03 17:17:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:34,559 INFO L480 AbstractCegarLoop]: Abstraction has 40283 states and 156964 transitions. [2021-05-03 17:17:34,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 40283 states and 156964 transitions. [2021-05-03 17:17:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:34,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:34,658 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:34,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-05-03 17:17:34,873 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:34,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 149 times [2021-05-03 17:17:34,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:34,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702245535] [2021-05-03 17:17:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:17:34,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702245535] [2021-05-03 17:17:34,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643849031] [2021-05-03 17:17:34,989 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 [2021-05-03 17:17:35,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:17:35,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:17:35,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:35,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:35,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 17:17:35,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965406986] [2021-05-03 17:17:35,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:17:35,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:17:35,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:17:35,433 INFO L87 Difference]: Start difference. First operand 40283 states and 156964 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:38,316 INFO L93 Difference]: Finished difference Result 59023 states and 221592 transitions. [2021-05-03 17:17:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 17:17:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:38,502 INFO L225 Difference]: With dead ends: 59023 [2021-05-03 17:17:38,503 INFO L226 Difference]: Without dead ends: 58999 [2021-05-03 17:17:38,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1522.7ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 17:17:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58999 states. [2021-05-03 17:17:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58999 to 40259. [2021-05-03 17:17:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40259 states, 40258 states have (on average 3.896765860201699) internal successors, (156876), 40258 states have internal predecessors, (156876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40259 states to 40259 states and 156876 transitions. [2021-05-03 17:17:40,098 INFO L78 Accepts]: Start accepts. Automaton has 40259 states and 156876 transitions. Word has length 28 [2021-05-03 17:17:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:40,098 INFO L480 AbstractCegarLoop]: Abstraction has 40259 states and 156876 transitions. [2021-05-03 17:17:40,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 40259 states and 156876 transitions. [2021-05-03 17:17:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:40,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:40,174 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:40,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-05-03 17:17:40,381 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 150 times [2021-05-03 17:17:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:40,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180380668] [2021-05-03 17:17:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:40,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180380668] [2021-05-03 17:17:40,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061308210] [2021-05-03 17:17:40,544 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 [2021-05-03 17:17:40,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:17:40,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:17:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:41,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:41,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:17:41,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821499500] [2021-05-03 17:17:41,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:17:41,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:41,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:17:41,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:17:41,010 INFO L87 Difference]: Start difference. First operand 40259 states and 156876 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:46,418 INFO L93 Difference]: Finished difference Result 62461 states and 231344 transitions. [2021-05-03 17:17:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-03 17:17:46,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:46,625 INFO L225 Difference]: With dead ends: 62461 [2021-05-03 17:17:46,625 INFO L226 Difference]: Without dead ends: 62461 [2021-05-03 17:17:46,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 3512.2ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 17:17:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62461 states. [2021-05-03 17:17:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62461 to 44583. [2021-05-03 17:17:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44583 states, 44582 states have (on average 3.8468888789197435) internal successors, (171502), 44582 states have internal predecessors, (171502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44583 states to 44583 states and 171502 transitions. [2021-05-03 17:17:48,196 INFO L78 Accepts]: Start accepts. Automaton has 44583 states and 171502 transitions. Word has length 28 [2021-05-03 17:17:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:48,196 INFO L480 AbstractCegarLoop]: Abstraction has 44583 states and 171502 transitions. [2021-05-03 17:17:48,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 44583 states and 171502 transitions. [2021-05-03 17:17:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:48,277 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:48,277 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:48,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:17:48,493 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 151 times [2021-05-03 17:17:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:48,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322670960] [2021-05-03 17:17:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:48,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322670960] [2021-05-03 17:17:48,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398722886] [2021-05-03 17:17:48,637 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 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 [2021-05-03 17:17:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:48,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:48,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:48,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:17:48,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448193098] [2021-05-03 17:17:48,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:17:48,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:17:48,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:17:48,983 INFO L87 Difference]: Start difference. First operand 44583 states and 171502 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:17:53,617 INFO L93 Difference]: Finished difference Result 61654 states and 229149 transitions. [2021-05-03 17:17:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 17:17:53,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:17:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:17:53,821 INFO L225 Difference]: With dead ends: 61654 [2021-05-03 17:17:53,822 INFO L226 Difference]: Without dead ends: 61646 [2021-05-03 17:17:53,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 3173.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 17:17:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61646 states. [2021-05-03 17:17:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61646 to 43473. [2021-05-03 17:17:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43473 states, 43472 states have (on average 3.8658216783216783) internal successors, (168055), 43472 states have internal predecessors, (168055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43473 states to 43473 states and 168055 transitions. [2021-05-03 17:17:55,379 INFO L78 Accepts]: Start accepts. Automaton has 43473 states and 168055 transitions. Word has length 28 [2021-05-03 17:17:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:17:55,379 INFO L480 AbstractCegarLoop]: Abstraction has 43473 states and 168055 transitions. [2021-05-03 17:17:55,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:17:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 43473 states and 168055 transitions. [2021-05-03 17:17:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:17:55,459 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:17:55,459 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:17:55,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-05-03 17:17:55,674 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:17:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:17:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 152 times [2021-05-03 17:17:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:17:55,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966711601] [2021-05-03 17:17:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:17:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:17:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:55,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966711601] [2021-05-03 17:17:55,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000233142] [2021-05-03 17:17:55,830 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 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 [2021-05-03 17:17:55,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:17:55,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:17:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:17:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:17:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:17:56,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:17:56,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:17:56,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486379677] [2021-05-03 17:17:56,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:17:56,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:17:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:17:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:17:56,228 INFO L87 Difference]: Start difference. First operand 43473 states and 168055 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:00,569 INFO L93 Difference]: Finished difference Result 59916 states and 224368 transitions. [2021-05-03 17:18:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 17:18:00,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:00,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:00,766 INFO L225 Difference]: With dead ends: 59916 [2021-05-03 17:18:00,766 INFO L226 Difference]: Without dead ends: 59892 [2021-05-03 17:18:00,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2704.8ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 17:18:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59892 states. [2021-05-03 17:18:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59892 to 43485. [2021-05-03 17:18:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43485 states, 43484 states have (on average 3.8636969919970565) internal successors, (168009), 43484 states have internal predecessors, (168009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43485 states to 43485 states and 168009 transitions. [2021-05-03 17:18:02,292 INFO L78 Accepts]: Start accepts. Automaton has 43485 states and 168009 transitions. Word has length 28 [2021-05-03 17:18:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:02,292 INFO L480 AbstractCegarLoop]: Abstraction has 43485 states and 168009 transitions. [2021-05-03 17:18:02,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 43485 states and 168009 transitions. [2021-05-03 17:18:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:02,370 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:02,370 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:02,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:18:02,570 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:02,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 153 times [2021-05-03 17:18:02,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:02,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531753455] [2021-05-03 17:18:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:02,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531753455] [2021-05-03 17:18:02,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044338049] [2021-05-03 17:18:02,703 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 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 [2021-05-03 17:18:02,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:18:02,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:02,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:03,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:03,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 17:18:03,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468555706] [2021-05-03 17:18:03,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:18:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:18:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:18:03,048 INFO L87 Difference]: Start difference. First operand 43485 states and 168009 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:07,011 INFO L93 Difference]: Finished difference Result 61163 states and 227783 transitions. [2021-05-03 17:18:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 17:18:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:07,207 INFO L225 Difference]: With dead ends: 61163 [2021-05-03 17:18:07,207 INFO L226 Difference]: Without dead ends: 61123 [2021-05-03 17:18:07,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2270.7ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 17:18:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61123 states. [2021-05-03 17:18:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61123 to 43617. [2021-05-03 17:18:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43617 states, 43616 states have (on average 3.863008987527513) internal successors, (168489), 43616 states have internal predecessors, (168489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43617 states to 43617 states and 168489 transitions. [2021-05-03 17:18:08,945 INFO L78 Accepts]: Start accepts. Automaton has 43617 states and 168489 transitions. Word has length 28 [2021-05-03 17:18:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:08,945 INFO L480 AbstractCegarLoop]: Abstraction has 43617 states and 168489 transitions. [2021-05-03 17:18:08,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 43617 states and 168489 transitions. [2021-05-03 17:18:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:09,034 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:09,034 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:09,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:18:09,249 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 154 times [2021-05-03 17:18:09,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:09,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166568644] [2021-05-03 17:18:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:09,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166568644] [2021-05-03 17:18:09,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370994873] [2021-05-03 17:18:09,469 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 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 [2021-05-03 17:18:09,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:18:09,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:10,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:10,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:18:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25676919] [2021-05-03 17:18:10,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:18:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:18:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:18:10,036 INFO L87 Difference]: Start difference. First operand 43617 states and 168489 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:15,747 INFO L93 Difference]: Finished difference Result 60432 states and 225635 transitions. [2021-05-03 17:18:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 17:18:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:15,928 INFO L225 Difference]: With dead ends: 60432 [2021-05-03 17:18:15,928 INFO L226 Difference]: Without dead ends: 60432 [2021-05-03 17:18:15,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 4078.6ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 17:18:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60432 states. [2021-05-03 17:18:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60432 to 44522. [2021-05-03 17:18:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.8534624109970577) internal successors, (171560), 44521 states have internal predecessors, (171560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 171560 transitions. [2021-05-03 17:18:17,456 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 171560 transitions. Word has length 28 [2021-05-03 17:18:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:17,456 INFO L480 AbstractCegarLoop]: Abstraction has 44522 states and 171560 transitions. [2021-05-03 17:18:17,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 171560 transitions. [2021-05-03 17:18:17,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:17,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:17,540 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:17,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:18:17,753 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:17,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 155 times [2021-05-03 17:18:17,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:17,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256831206] [2021-05-03 17:18:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:17,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256831206] [2021-05-03 17:18:17,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074391313] [2021-05-03 17:18:17,906 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 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 [2021-05-03 17:18:17,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:18:17,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:18,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:18,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:18:18,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938061400] [2021-05-03 17:18:18,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:18:18,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:18,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:18:18,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:18:18,438 INFO L87 Difference]: Start difference. First operand 44522 states and 171560 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:22,095 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-05-03 17:18:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:22,845 INFO L93 Difference]: Finished difference Result 59813 states and 223888 transitions. [2021-05-03 17:18:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 17:18:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:23,036 INFO L225 Difference]: With dead ends: 59813 [2021-05-03 17:18:23,036 INFO L226 Difference]: Without dead ends: 59805 [2021-05-03 17:18:23,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 2961.2ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 17:18:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59805 states. [2021-05-03 17:18:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59805 to 44446. [2021-05-03 17:18:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44446 states, 44445 states have (on average 3.8547418157273032) internal successors, (171324), 44445 states have internal predecessors, (171324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44446 states to 44446 states and 171324 transitions. [2021-05-03 17:18:24,571 INFO L78 Accepts]: Start accepts. Automaton has 44446 states and 171324 transitions. Word has length 28 [2021-05-03 17:18:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:24,571 INFO L480 AbstractCegarLoop]: Abstraction has 44446 states and 171324 transitions. [2021-05-03 17:18:24,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 44446 states and 171324 transitions. [2021-05-03 17:18:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:24,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:24,656 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:24,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:18:24,869 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 156 times [2021-05-03 17:18:24,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:24,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341041399] [2021-05-03 17:18:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:25,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341041399] [2021-05-03 17:18:25,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024278020] [2021-05-03 17:18:25,039 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 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 [2021-05-03 17:18:25,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:18:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:25,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:25,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:25,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:18:25,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358958801] [2021-05-03 17:18:25,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:18:25,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:18:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:18:25,506 INFO L87 Difference]: Start difference. First operand 44446 states and 171324 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:29,853 INFO L93 Difference]: Finished difference Result 59290 states and 222642 transitions. [2021-05-03 17:18:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 17:18:29,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:30,083 INFO L225 Difference]: With dead ends: 59290 [2021-05-03 17:18:30,083 INFO L226 Difference]: Without dead ends: 59266 [2021-05-03 17:18:30,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2590.1ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 17:18:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59266 states. [2021-05-03 17:18:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59266 to 44432. [2021-05-03 17:18:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44432 states, 44431 states have (on average 3.8547185523620895) internal successors, (171269), 44431 states have internal predecessors, (171269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44432 states to 44432 states and 171269 transitions. [2021-05-03 17:18:31,761 INFO L78 Accepts]: Start accepts. Automaton has 44432 states and 171269 transitions. Word has length 28 [2021-05-03 17:18:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:31,762 INFO L480 AbstractCegarLoop]: Abstraction has 44432 states and 171269 transitions. [2021-05-03 17:18:31,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44432 states and 171269 transitions. [2021-05-03 17:18:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:31,836 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:31,836 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:32,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:18:32,037 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 157 times [2021-05-03 17:18:32,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:32,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992282294] [2021-05-03 17:18:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:32,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992282294] [2021-05-03 17:18:32,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555510810] [2021-05-03 17:18:32,178 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 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 [2021-05-03 17:18:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:32,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:32,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:32,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:32,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 17:18:32,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624967971] [2021-05-03 17:18:32,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:18:32,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:32,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:18:32,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:18:32,595 INFO L87 Difference]: Start difference. First operand 44432 states and 171269 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:36,980 INFO L93 Difference]: Finished difference Result 59072 states and 221949 transitions. [2021-05-03 17:18:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 17:18:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:37,172 INFO L225 Difference]: With dead ends: 59072 [2021-05-03 17:18:37,172 INFO L226 Difference]: Without dead ends: 59032 [2021-05-03 17:18:37,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2595.6ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 17:18:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59032 states. [2021-05-03 17:18:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59032 to 44781. [2021-05-03 17:18:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44781 states, 44780 states have (on average 3.856587762393926) internal successors, (172698), 44780 states have internal predecessors, (172698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44781 states to 44781 states and 172698 transitions. [2021-05-03 17:18:38,891 INFO L78 Accepts]: Start accepts. Automaton has 44781 states and 172698 transitions. Word has length 28 [2021-05-03 17:18:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:38,891 INFO L480 AbstractCegarLoop]: Abstraction has 44781 states and 172698 transitions. [2021-05-03 17:18:38,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 44781 states and 172698 transitions. [2021-05-03 17:18:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:38,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:38,995 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:39,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-05-03 17:18:39,196 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 158 times [2021-05-03 17:18:39,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:39,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065174690] [2021-05-03 17:18:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:39,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065174690] [2021-05-03 17:18:39,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833176377] [2021-05-03 17:18:39,343 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 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 [2021-05-03 17:18:39,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:18:39,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:39,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:39,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:39,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:39,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:18:39,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038536873] [2021-05-03 17:18:39,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:18:39,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:18:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:18:39,859 INFO L87 Difference]: Start difference. First operand 44781 states and 172698 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:44,519 INFO L93 Difference]: Finished difference Result 71883 states and 267354 transitions. [2021-05-03 17:18:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 17:18:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:44,722 INFO L225 Difference]: With dead ends: 71883 [2021-05-03 17:18:44,722 INFO L226 Difference]: Without dead ends: 71883 [2021-05-03 17:18:44,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 2787.9ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 17:18:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71883 states. [2021-05-03 17:18:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71883 to 45947. [2021-05-03 17:18:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45947 states, 45946 states have (on average 3.870913681278022) internal successors, (177853), 45946 states have internal predecessors, (177853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45947 states to 45947 states and 177853 transitions. [2021-05-03 17:18:46,477 INFO L78 Accepts]: Start accepts. Automaton has 45947 states and 177853 transitions. Word has length 28 [2021-05-03 17:18:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:46,477 INFO L480 AbstractCegarLoop]: Abstraction has 45947 states and 177853 transitions. [2021-05-03 17:18:46,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 45947 states and 177853 transitions. [2021-05-03 17:18:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:46,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:46,561 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:46,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-05-03 17:18:46,761 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 159 times [2021-05-03 17:18:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:46,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707601064] [2021-05-03 17:18:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:46,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707601064] [2021-05-03 17:18:46,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422362857] [2021-05-03 17:18:46,951 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 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 [2021-05-03 17:18:46,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:18:46,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:47,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:47,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 17:18:47,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053813177] [2021-05-03 17:18:47,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:18:47,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:47,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:18:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:18:47,515 INFO L87 Difference]: Start difference. First operand 45947 states and 177853 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:18:51,773 INFO L93 Difference]: Finished difference Result 65842 states and 248215 transitions. [2021-05-03 17:18:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 17:18:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 17:18:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:18:51,993 INFO L225 Difference]: With dead ends: 65842 [2021-05-03 17:18:51,993 INFO L226 Difference]: Without dead ends: 65842 [2021-05-03 17:18:51,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 2431.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 17:18:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65842 states. [2021-05-03 17:18:53,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65842 to 45977. [2021-05-03 17:18:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45977 states, 45976 states have (on average 3.8707151557334263) internal successors, (177960), 45976 states have internal predecessors, (177960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45977 states to 45977 states and 177960 transitions. [2021-05-03 17:18:53,725 INFO L78 Accepts]: Start accepts. Automaton has 45977 states and 177960 transitions. Word has length 28 [2021-05-03 17:18:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:18:53,726 INFO L480 AbstractCegarLoop]: Abstraction has 45977 states and 177960 transitions. [2021-05-03 17:18:53,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:18:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45977 states and 177960 transitions. [2021-05-03 17:18:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 17:18:53,812 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:18:53,812 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:18:54,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-05-03 17:18:54,013 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:18:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:18:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 160 times [2021-05-03 17:18:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:18:54,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360728547] [2021-05-03 17:18:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:18:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:18:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:54,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360728547] [2021-05-03 17:18:54,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751969551] [2021-05-03 17:18:54,165 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:18:54,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:18:54,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:18:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:18:54,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:18:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:18:54,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:18:54,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:18:54,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418971603] [2021-05-03 17:18:54,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:18:54,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:18:54,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:18:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:18:54,745 INFO L87 Difference]: Start difference. First operand 45977 states and 177960 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-05-03 17:18:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 17:18:58,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-05-03 17:18:58,560 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 17:18:58,564 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 17:18:58,565 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 05:18:58 BasicIcfg [2021-05-03 17:18:58,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 17:18:58,565 INFO L168 Benchmark]: Toolchain (without parser) took 872366.40 ms. Allocated memory was 367.0 MB in the beginning and 10.4 GB in the end (delta: 10.0 GB). Free memory was 346.0 MB in the beginning and 6.7 GB in the end (delta: -6.3 GB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. [2021-05-03 17:18:58,566 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 367.0 MB. Free memory was 347.2 MB in the beginning and 347.1 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:18:58,566 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.56 ms. Allocated memory is still 367.0 MB. Free memory was 346.0 MB in the beginning and 344.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:18:58,566 INFO L168 Benchmark]: Boogie Preprocessor took 12.42 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 343.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 17:18:58,566 INFO L168 Benchmark]: RCFGBuilder took 210.36 ms. Allocated memory is still 367.0 MB. Free memory was 343.5 MB in the beginning and 330.9 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 17:18:58,566 INFO L168 Benchmark]: TraceAbstraction took 872113.20 ms. Allocated memory was 367.0 MB in the beginning and 10.4 GB in the end (delta: 10.0 GB). Free memory was 330.4 MB in the beginning and 6.7 GB in the end (delta: -6.3 GB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. [2021-05-03 17:18:58,566 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 367.0 MB. Free memory was 347.2 MB in the beginning and 347.1 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.56 ms. Allocated memory is still 367.0 MB. Free memory was 346.0 MB in the beginning and 344.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.42 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 343.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 210.36 ms. Allocated memory is still 367.0 MB. Free memory was 343.5 MB in the beginning and 330.9 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 872113.20 ms. Allocated memory was 367.0 MB in the beginning and 10.4 GB in the end (delta: 10.0 GB). Free memory was 330.4 MB in the beginning and 6.7 GB in the end (delta: -6.3 GB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (45977states) and FLOYD_HOARE automaton (currently 56 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (6380 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 871991.7ms, OverallIterations: 243, TraceHistogramMax: 3, EmptinessCheckTime: 4857.1ms, AutomataDifference: 594071.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10675 SDtfs, 67419 SDslu, 80473 SDs, 0 SdLazy, 132549 SolverSat, 12134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 94928.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15561 GetRequests, 5143 SyntacticMatches, 275 SemanticMatches, 10143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169531 ImplicationChecksByTransitivity, 400183.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45977occurred in iteration=242, InterpolantAutomatonStates: 9002, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78624.3ms AutomataMinimizationTime, 242 MinimizatonAttempts, 1187327 StatesRemovedByMinimization, 241 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 773.1ms SsaConstructionTime, 2605.2ms SatisfiabilityAnalysisTime, 136976.2ms InterpolantComputationTime, 12882 NumberOfCodeBlocks, 12882 NumberOfCodeBlocksAsserted, 835 NumberOfCheckSat, 12398 ConstructedInterpolants, 97 QuantifiedInterpolants, 122521 SizeOfPredicates, 1063 NumberOfNonLiveVariables, 16778 ConjunctsInSsa, 3609 ConjunctsInUnsatCore, 484 InterpolantComputations, 2 PerfectInterpolantSequences, 942/4033 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