/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:21:54,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:21:54,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:21:54,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:21:54,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:21:54,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:21:54,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:21:54,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:21:54,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:21:54,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:21:54,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:21:54,791 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:21:54,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:21:54,791 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:21:54,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:21:54,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:21:54,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:21:54,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:21:54,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:21:54,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:21:54,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:21:54,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:21:54,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:21:54,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:21:54,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:21:54,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:21:54,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:21:54,794 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:21:54,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:21:54,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:21:55,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:21:55,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:21:55,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:21:55,144 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:21:55,145 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:21:55,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-07-09 17:21:55,147 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-07-09 17:21:55,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:21:55,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:21:55,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:21:55,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:21:55,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:21:55,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:21:55,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:21:55,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:21:55,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:21:55,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... [2021-07-09 17:21:55,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:21:55,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:21:55,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:21:55,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:21:55,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:21:55,288 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:21:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:21:55,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:21:55,289 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:21:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:21:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:21:55,290 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:21:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:21:55,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:21:55,291 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:21:55,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:21:55,560 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:21:55,561 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:21:55,562 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:21:55 BoogieIcfgContainer [2021-07-09 17:21:55,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:21:55,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:21:55,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:21:55,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:21:55,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:55" (1/2) ... [2021-07-09 17:21:55,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593173d8 and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:21:55, skipping insertion in model container [2021-07-09 17:21:55,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:21:55" (2/2) ... [2021-07-09 17:21:55,567 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-07-09 17:21:55,570 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:21:55,570 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:21:55,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:21:55,571 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:21:55,590 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:21:55,605 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:21:55,618 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:21:55,618 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:21:55,618 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:21:55,618 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:21:55,618 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:21:55,618 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:21:55,618 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:21:55,618 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:21:55,624 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-07-09 17:21:55,631 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:21:55,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:55,636 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:55,636 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-07-09 17:21:55,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:55,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425402997] [2021-07-09 17:21:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:55,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:55,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425402997] [2021-07-09 17:21:55,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425402997] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:55,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:55,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:21:55,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76522797] [2021-07-09 17:21:55,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:21:55,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:21:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:55,847 INFO L87 Difference]: Start difference. First operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:55,875 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-07-09 17:21:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:21:55,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-09 17:21:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:55,882 INFO L225 Difference]: With dead ends: 26 [2021-07-09 17:21:55,882 INFO L226 Difference]: Without dead ends: 18 [2021-07-09 17:21:55,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-09 17:21:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-09 17:21:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-07-09 17:21:55,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-07-09 17:21:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:55,901 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-07-09 17:21:55,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-07-09 17:21:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:21:55,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:55,902 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:55,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:21:55,902 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-07-09 17:21:55,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:55,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020140837] [2021-07-09 17:21:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:55,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:55,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020140837] [2021-07-09 17:21:55,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020140837] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:55,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:55,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:21:55,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366030645] [2021-07-09 17:21:55,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:21:55,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:21:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:55,940 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:55,959 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-09 17:21:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:21:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-09 17:21:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:55,959 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:21:55,959 INFO L226 Difference]: Without dead ends: 23 [2021-07-09 17:21:55,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-07-09 17:21:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-07-09 17:21:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-07-09 17:21:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-09 17:21:55,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-09 17:21:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:55,963 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-09 17:21:55,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-09 17:21:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:55,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:55,964 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:55,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:21:55,964 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-07-09 17:21:55,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:55,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567375372] [2021-07-09 17:21:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:56,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567375372] [2021-07-09 17:21:56,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567375372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438696834] [2021-07-09 17:21:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:56,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:56,272 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 [2021-07-09 17:21:56,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 17:21:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438696834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:56,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:56,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469383382] [2021-07-09 17:21:56,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:56,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:56,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:56,284 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:56,356 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-07-09 17:21:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:56,357 INFO L225 Difference]: With dead ends: 30 [2021-07-09 17:21:56,357 INFO L226 Difference]: Without dead ends: 22 [2021-07-09 17:21:56,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-07-09 17:21:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-07-09 17:21:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2021-07-09 17:21:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-07-09 17:21:56,360 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-07-09 17:21:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:56,360 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-07-09 17:21:56,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-07-09 17:21:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:56,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:56,361 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:56,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 17:21:56,578 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-07-09 17:21:56,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:56,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100929047] [2021-07-09 17:21:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:56,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100929047] [2021-07-09 17:21:56,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100929047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761895858] [2021-07-09 17:21:56,689 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:56,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:56,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:56,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,865 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 15 treesize of output 37 [2021-07-09 17:21:56,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:21:56,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,899 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-07-09 17:21:56,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:21:56,905 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 [2021-07-09 17:21:56,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,959 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-07-09 17:21:56,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:56,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-07-09 17:21:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761895858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:57,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940835546] [2021-07-09 17:21:57,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:57,034 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:57,134 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-07-09 17:21:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:57,135 INFO L225 Difference]: With dead ends: 35 [2021-07-09 17:21:57,136 INFO L226 Difference]: Without dead ends: 30 [2021-07-09 17:21:57,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-07-09 17:21:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-07-09 17:21:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2021-07-09 17:21:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-07-09 17:21:57,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-07-09 17:21:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:57,139 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-07-09 17:21:57,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-07-09 17:21:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:57,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:57,139 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:57,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:57,345 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-07-09 17:21:57,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:57,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766683920] [2021-07-09 17:21:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766683920] [2021-07-09 17:21:57,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766683920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856168778] [2021-07-09 17:21:57,455 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 [2021-07-09 17:21:57,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:21:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:57,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:57,593 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 15 treesize of output 37 [2021-07-09 17:21:57,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:21:57,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:57,622 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-07-09 17:21:57,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:21:57,627 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 [2021-07-09 17:21:57,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:57,681 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-07-09 17:21:57,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:57,682 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-07-09 17:21:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856168778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:57,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:57,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922430577] [2021-07-09 17:21:57,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:57,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:57,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:57,721 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:57,830 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-07-09 17:21:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:57,831 INFO L225 Difference]: With dead ends: 51 [2021-07-09 17:21:57,831 INFO L226 Difference]: Without dead ends: 41 [2021-07-09 17:21:57,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-09 17:21:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-07-09 17:21:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-07-09 17:21:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-07-09 17:21:57,834 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-07-09 17:21:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:57,834 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-07-09 17:21:57,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-07-09 17:21:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:57,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:57,835 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 17:21:58,054 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-07-09 17:21:58,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562331497] [2021-07-09 17:21:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562331497] [2021-07-09 17:21:58,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562331497] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:58,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:58,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:21:58,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90673979] [2021-07-09 17:21:58,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:21:58,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:21:58,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:21:58,073 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:58,100 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-07-09 17:21:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:21:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:58,101 INFO L225 Difference]: With dead ends: 29 [2021-07-09 17:21:58,101 INFO L226 Difference]: Without dead ends: 29 [2021-07-09 17:21:58,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:21:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-09 17:21:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-07-09 17:21:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-07-09 17:21:58,103 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-07-09 17:21:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:58,103 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-07-09 17:21:58,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-07-09 17:21:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:58,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:58,104 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-07-09 17:21:58,104 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-07-09 17:21:58,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587555231] [2021-07-09 17:21:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587555231] [2021-07-09 17:21:58,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587555231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857965864] [2021-07-09 17:21:58,216 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:21:58,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:58,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:58,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:58,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,349 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:58,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-09 17:21:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857965864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:58,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:21:58,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144147137] [2021-07-09 17:21:58,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:21:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:21:58,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:58,362 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:58,423 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-07-09 17:21:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:58,424 INFO L225 Difference]: With dead ends: 37 [2021-07-09 17:21:58,424 INFO L226 Difference]: Without dead ends: 29 [2021-07-09 17:21:58,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-09 17:21:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-07-09 17:21:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-07-09 17:21:58,427 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-07-09 17:21:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:58,427 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-07-09 17:21:58,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-07-09 17:21:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:58,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:58,427 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:58,647 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,647 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-07-09 17:21:58,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024165721] [2021-07-09 17:21:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024165721] [2021-07-09 17:21:58,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024165721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427360635] [2021-07-09 17:21:58,817 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 [2021-07-09 17:21:58,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:58,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,917 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 17 treesize of output 37 [2021-07-09 17:21:58,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:58,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,931 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:58,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,964 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:58,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:58,965 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-07-09 17:21:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427360635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:58,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:21:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202837257] [2021-07-09 17:21:58,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:21:58,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:21:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:58,999 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:59,098 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2021-07-09 17:21:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:59,099 INFO L225 Difference]: With dead ends: 40 [2021-07-09 17:21:59,099 INFO L226 Difference]: Without dead ends: 35 [2021-07-09 17:21:59,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-07-09 17:21:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-07-09 17:21:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-07-09 17:21:59,102 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-07-09 17:21:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:59,102 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-07-09 17:21:59,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-07-09 17:21:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:59,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:59,102 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:59,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:21:59,320 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:59,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-07-09 17:21:59,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:59,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072018531] [2021-07-09 17:21:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:59,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072018531] [2021-07-09 17:21:59,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072018531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849030108] [2021-07-09 17:21:59,417 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 [2021-07-09 17:21:59,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:21:59,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:59,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:59,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:59,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:59,545 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 17 treesize of output 37 [2021-07-09 17:21:59,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:59,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:59,561 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:59,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:59,580 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:59,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:59,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-07-09 17:21:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849030108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:59,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:21:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050818139] [2021-07-09 17:21:59,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:21:59,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:21:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:59,611 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:59,780 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-07-09 17:21:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:59,781 INFO L225 Difference]: With dead ends: 61 [2021-07-09 17:21:59,781 INFO L226 Difference]: Without dead ends: 51 [2021-07-09 17:21:59,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-09 17:21:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-07-09 17:21:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-07-09 17:21:59,784 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-07-09 17:21:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:59,784 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-07-09 17:21:59,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-07-09 17:21:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:59,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:59,785 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:00,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,005 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:00,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-07-09 17:22:00,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:00,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821721174] [2021-07-09 17:22:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:00,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821721174] [2021-07-09 17:22:00,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821721174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083915218] [2021-07-09 17:22:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:22:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083915218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:22:00,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852622430] [2021-07-09 17:22:00,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:22:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:22:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:22:00,070 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:00,096 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-07-09 17:22:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:22:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:22:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:00,097 INFO L225 Difference]: With dead ends: 59 [2021-07-09 17:22:00,097 INFO L226 Difference]: Without dead ends: 59 [2021-07-09 17:22:00,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:22:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-09 17:22:00,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-07-09 17:22:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-07-09 17:22:00,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-07-09 17:22:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:00,100 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-07-09 17:22:00,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-07-09 17:22:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:22:00,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:00,100 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:00,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,317 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:00,318 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-07-09 17:22:00,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:00,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320117620] [2021-07-09 17:22:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320117620] [2021-07-09 17:22:00,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320117620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819347327] [2021-07-09 17:22:00,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:00,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:22:00,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819347327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:22:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655735113] [2021-07-09 17:22:00,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:22:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:22:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:22:00,398 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:00,430 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-07-09 17:22:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:22:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:00,431 INFO L225 Difference]: With dead ends: 43 [2021-07-09 17:22:00,431 INFO L226 Difference]: Without dead ends: 43 [2021-07-09 17:22:00,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-09 17:22:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-07-09 17:22:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-07-09 17:22:00,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-07-09 17:22:00,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:00,434 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-07-09 17:22:00,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-07-09 17:22:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:22:00,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:00,434 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:00,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:22:00,652 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-07-09 17:22:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:00,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851105133] [2021-07-09 17:22:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:00,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851105133] [2021-07-09 17:22:00,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851105133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920020420] [2021-07-09 17:22:00,717 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:22:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:00,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:22:00,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:00,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:00,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:00,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:22:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920020420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:22:00,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674593124] [2021-07-09 17:22:00,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:00,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:00,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:00,890 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:00,979 INFO L93 Difference]: Finished difference Result 44 states and 87 transitions. [2021-07-09 17:22:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:00,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:22:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:00,980 INFO L225 Difference]: With dead ends: 44 [2021-07-09 17:22:00,980 INFO L226 Difference]: Without dead ends: 39 [2021-07-09 17:22:00,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-09 17:22:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-07-09 17:22:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-07-09 17:22:00,983 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-07-09 17:22:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:00,983 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-07-09 17:22:00,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-07-09 17:22:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:22:00,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:00,984 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:01,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:01,201 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-07-09 17:22:01,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:01,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574517198] [2021-07-09 17:22:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:01,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574517198] [2021-07-09 17:22:01,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574517198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247259750] [2021-07-09 17:22:01,271 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) [2021-07-09 17:22:01,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:01,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:22:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:01,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:01,405 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 19 treesize of output 37 [2021-07-09 17:22:01,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:01,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:01,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:01,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:22:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247259750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:01,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:22:01,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263510851] [2021-07-09 17:22:01,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:01,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:01,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:01,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:01,425 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:22:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:01,506 INFO L93 Difference]: Finished difference Result 55 states and 100 transitions. [2021-07-09 17:22:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13 [2021-07-09 17:22:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:01,508 INFO L225 Difference]: With dead ends: 55 [2021-07-09 17:22:01,508 INFO L226 Difference]: Without dead ends: 50 [2021-07-09 17:22:01,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-09 17:22:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-07-09 17:22:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-07-09 17:22:01,510 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-07-09 17:22:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:01,510 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-07-09 17:22:01,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:22:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-07-09 17:22:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:22:01,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:01,511 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:01,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:01,729 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-07-09 17:22:01,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:01,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137213864] [2021-07-09 17:22:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:01,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137213864] [2021-07-09 17:22:01,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137213864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677248778] [2021-07-09 17:22:01,750 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 [2021-07-09 17:22:01,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:22:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:22:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677248778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:01,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:22:01,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110152826] [2021-07-09 17:22:01,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:22:01,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:01,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:22:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:22:01,812 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:01,843 INFO L93 Difference]: Finished difference Result 85 states and 153 transitions. [2021-07-09 17:22:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:22:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:01,844 INFO L225 Difference]: With dead ends: 85 [2021-07-09 17:22:01,844 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 17:22:01,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 17:22:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-07-09 17:22:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-07-09 17:22:01,847 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-07-09 17:22:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:01,847 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-07-09 17:22:01,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-07-09 17:22:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:22:01,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:01,847 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:02,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 17:22:02,065 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-07-09 17:22:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:02,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261502393] [2021-07-09 17:22:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:02,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261502393] [2021-07-09 17:22:02,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261502393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206138563] [2021-07-09 17:22:02,084 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) [2021-07-09 17:22:02,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:22:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206138563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:02,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:22:02,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020499042] [2021-07-09 17:22:02,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:22:02,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:22:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:22:02,148 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:02,190 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-07-09 17:22:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:22:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:22:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:02,191 INFO L225 Difference]: With dead ends: 65 [2021-07-09 17:22:02,191 INFO L226 Difference]: Without dead ends: 65 [2021-07-09 17:22:02,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-09 17:22:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-07-09 17:22:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-07-09 17:22:02,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-07-09 17:22:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:02,193 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-07-09 17:22:02,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-07-09 17:22:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:22:02,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:02,193 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:02,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:02,410 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-07-09 17:22:02,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:02,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395917198] [2021-07-09 17:22:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395917198] [2021-07-09 17:22:02,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395917198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083636226] [2021-07-09 17:22:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:02,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:22:02,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:22:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:02,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:02,610 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 19 treesize of output 37 [2021-07-09 17:22:02,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:02,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:02,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:02,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:22:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083636226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:02,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:22:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122088172] [2021-07-09 17:22:02,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:02,627 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:22:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:02,748 INFO L93 Difference]: Finished difference Result 78 states and 134 transitions. [2021-07-09 17:22:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13 [2021-07-09 17:22:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:02,749 INFO L225 Difference]: With dead ends: 78 [2021-07-09 17:22:02,749 INFO L226 Difference]: Without dead ends: 73 [2021-07-09 17:22:02,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-09 17:22:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-07-09 17:22:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-07-09 17:22:02,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-07-09 17:22:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:02,752 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-07-09 17:22:02,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:22:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-07-09 17:22:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:22:02,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:02,752 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:02,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:22:02,969 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-07-09 17:22:02,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:02,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711741555] [2021-07-09 17:22:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:02,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711741555] [2021-07-09 17:22:02,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711741555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149590957] [2021-07-09 17:22:02,995 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:03,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149590957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:03,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:22:03,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566698072] [2021-07-09 17:22:03,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:22:03,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:03,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:22:03,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:22:03,051 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:03,094 INFO L93 Difference]: Finished difference Result 65 states and 130 transitions. [2021-07-09 17:22:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:22:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:03,095 INFO L225 Difference]: With dead ends: 65 [2021-07-09 17:22:03,095 INFO L226 Difference]: Without dead ends: 65 [2021-07-09 17:22:03,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-09 17:22:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-07-09 17:22:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-07-09 17:22:03,097 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-07-09 17:22:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:03,097 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-07-09 17:22:03,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-07-09 17:22:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:03,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:03,098 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:03,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,315 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:03,316 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-07-09 17:22:03,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:03,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230998839] [2021-07-09 17:22:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:03,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230998839] [2021-07-09 17:22:03,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230998839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473957421] [2021-07-09 17:22:03,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:03,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473957421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:03,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:03,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851308825] [2021-07-09 17:22:03,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:03,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:03,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:03,398 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:03,440 INFO L93 Difference]: Finished difference Result 84 states and 148 transitions. [2021-07-09 17:22:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:22:03,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:03,441 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:22:03,441 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:22:03,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:22:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-07-09 17:22:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-07-09 17:22:03,444 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-07-09 17:22:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:03,444 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-07-09 17:22:03,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-07-09 17:22:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:03,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:03,444 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:03,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,663 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:03,663 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-07-09 17:22:03,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:03,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572406115] [2021-07-09 17:22:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572406115] [2021-07-09 17:22:03,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572406115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685960645] [2021-07-09 17:22:03,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685960645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:03,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:03,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392003189] [2021-07-09 17:22:03,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:03,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:03,742 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:03,811 INFO L93 Difference]: Finished difference Result 106 states and 189 transitions. [2021-07-09 17:22:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:03,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:03,812 INFO L225 Difference]: With dead ends: 106 [2021-07-09 17:22:03,812 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 17:22:03,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 17:22:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-07-09 17:22:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-07-09 17:22:03,814 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-07-09 17:22:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:03,814 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-07-09 17:22:03,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-07-09 17:22:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:03,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:03,815 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:04,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,032 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-07-09 17:22:04,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:04,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769827615] [2021-07-09 17:22:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769827615] [2021-07-09 17:22:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769827615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305495940] [2021-07-09 17:22:04,057 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:22:04,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:04,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305495940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:04,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989517006] [2021-07-09 17:22:04,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:04,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:04,156 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,203 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2021-07-09 17:22:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,204 INFO L225 Difference]: With dead ends: 60 [2021-07-09 17:22:04,204 INFO L226 Difference]: Without dead ends: 58 [2021-07-09 17:22:04,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-09 17:22:04,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-07-09 17:22:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-07-09 17:22:04,206 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-07-09 17:22:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,206 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-07-09 17:22:04,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-07-09 17:22:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:04,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,207 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:04,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 17:22:04,426 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-07-09 17:22:04,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:04,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45094616] [2021-07-09 17:22:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45094616] [2021-07-09 17:22:04,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45094616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250146247] [2021-07-09 17:22:04,449 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250146247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:04,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:04,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109620642] [2021-07-09 17:22:04,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:04,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:04,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:04,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:04,503 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,546 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2021-07-09 17:22:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:22:04,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,547 INFO L225 Difference]: With dead ends: 94 [2021-07-09 17:22:04,547 INFO L226 Difference]: Without dead ends: 94 [2021-07-09 17:22:04,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-09 17:22:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-07-09 17:22:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-07-09 17:22:04,549 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-07-09 17:22:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,549 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-07-09 17:22:04,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,549 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-07-09 17:22:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:04,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,549 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:04,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:22:04,766 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:04,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:04,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-07-09 17:22:04,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:04,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134119295] [2021-07-09 17:22:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:04,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134119295] [2021-07-09 17:22:04,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134119295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591496362] [2021-07-09 17:22:04,793 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:22:04,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:04,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591496362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:04,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:04,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534934984] [2021-07-09 17:22:04,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:04,875 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,924 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2021-07-09 17:22:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,925 INFO L225 Difference]: With dead ends: 59 [2021-07-09 17:22:04,925 INFO L226 Difference]: Without dead ends: 55 [2021-07-09 17:22:04,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-07-09 17:22:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-07-09 17:22:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-07-09 17:22:04,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-07-09 17:22:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,927 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-07-09 17:22:04,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-07-09 17:22:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:04,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,928 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:05,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 17:22:05,148 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-07-09 17:22:05,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:05,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665905027] [2021-07-09 17:22:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:05,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665905027] [2021-07-09 17:22:05,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665905027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041726007] [2021-07-09 17:22:05,185 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:22:05,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:05,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041726007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:05,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:05,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9376990] [2021-07-09 17:22:05,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:05,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:05,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:05,245 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:05,294 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-07-09 17:22:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:05,295 INFO L225 Difference]: With dead ends: 91 [2021-07-09 17:22:05,295 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:22:05,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:22:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-07-09 17:22:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-07-09 17:22:05,297 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-07-09 17:22:05,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:05,297 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-07-09 17:22:05,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-07-09 17:22:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:05,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:05,297 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:05,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 17:22:05,514 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-07-09 17:22:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:05,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274417270] [2021-07-09 17:22:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:05,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274417270] [2021-07-09 17:22:05,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274417270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848810444] [2021-07-09 17:22:05,538 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 [2021-07-09 17:22:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:05,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:05,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848810444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:05,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:05,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188457872] [2021-07-09 17:22:05,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:05,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:05,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:05,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:05,621 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:05,655 INFO L93 Difference]: Finished difference Result 62 states and 119 transitions. [2021-07-09 17:22:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:05,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:05,656 INFO L225 Difference]: With dead ends: 62 [2021-07-09 17:22:05,656 INFO L226 Difference]: Without dead ends: 56 [2021-07-09 17:22:05,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-09 17:22:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-07-09 17:22:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-07-09 17:22:05,657 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-07-09 17:22:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:05,657 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-07-09 17:22:05,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-07-09 17:22:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:05,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:05,658 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:05,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:22:05,874 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:05,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-07-09 17:22:05,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:05,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001527560] [2021-07-09 17:22:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001527560] [2021-07-09 17:22:05,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001527560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870140897] [2021-07-09 17:22:05,899 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 [2021-07-09 17:22:05,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:22:05,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:05,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870140897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:05,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:05,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581146988] [2021-07-09 17:22:05,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:05,966 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:06,046 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-07-09 17:22:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:06,046 INFO L225 Difference]: With dead ends: 88 [2021-07-09 17:22:06,047 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 17:22:06,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 17:22:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-07-09 17:22:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-07-09 17:22:06,049 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-07-09 17:22:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:06,049 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-07-09 17:22:06,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-07-09 17:22:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:06,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:06,049 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:06,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,266 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-07-09 17:22:06,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:06,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793252370] [2021-07-09 17:22:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793252370] [2021-07-09 17:22:06,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793252370] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:22:06,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:22:06,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:22:06,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081568570] [2021-07-09 17:22:06,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:22:06,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:06,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:22:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:22:06,301 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:06,318 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2021-07-09 17:22:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:06,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:22:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:06,319 INFO L225 Difference]: With dead ends: 53 [2021-07-09 17:22:06,319 INFO L226 Difference]: Without dead ends: 45 [2021-07-09 17:22:06,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:22:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-09 17:22:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-07-09 17:22:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-07-09 17:22:06,326 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-07-09 17:22:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:06,326 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-07-09 17:22:06,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-07-09 17:22:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:22:06,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:06,327 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:06,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-07-09 17:22:06,327 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-07-09 17:22:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:06,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037042956] [2021-07-09 17:22:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037042956] [2021-07-09 17:22:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037042956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592574053] [2021-07-09 17:22:06,351 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:06,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:22:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592574053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:06,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:22:06,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999541834] [2021-07-09 17:22:06,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:06,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:06,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:06,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:06,401 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-07-09 17:22:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:06,449 INFO L93 Difference]: Finished difference Result 91 states and 185 transitions. [2021-07-09 17:22:06,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 14 [2021-07-09 17:22:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:06,450 INFO L225 Difference]: With dead ends: 91 [2021-07-09 17:22:06,450 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:22:06,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:22:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-07-09 17:22:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-07-09 17:22:06,452 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-07-09 17:22:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:06,452 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-07-09 17:22:06,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-07-09 17:22:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-07-09 17:22:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:06,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:06,453 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:06,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,669 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-07-09 17:22:06,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:06,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502995673] [2021-07-09 17:22:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502995673] [2021-07-09 17:22:06,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502995673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576151754] [2021-07-09 17:22:06,737 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:06,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:22:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:07,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:07,003 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:07,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:07,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:07,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:07,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-07-09 17:22:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576151754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:07,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:07,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796916790] [2021-07-09 17:22:07,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:07,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:07,030 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:07,157 INFO L93 Difference]: Finished difference Result 66 states and 137 transitions. [2021-07-09 17:22:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:07,157 INFO L225 Difference]: With dead ends: 66 [2021-07-09 17:22:07,157 INFO L226 Difference]: Without dead ends: 56 [2021-07-09 17:22:07,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-09 17:22:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-07-09 17:22:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-07-09 17:22:07,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-07-09 17:22:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:07,159 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-07-09 17:22:07,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-07-09 17:22:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:07,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:07,160 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:07,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,377 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-07-09 17:22:07,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:07,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65245073] [2021-07-09 17:22:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:07,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65245073] [2021-07-09 17:22:07,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65245073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226791512] [2021-07-09 17:22:07,440 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:07,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:07,874 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 44 [2021-07-09 17:22:07,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:07,901 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:07,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:07,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:07,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:07,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:22:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226791512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:07,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:07,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144529179] [2021-07-09 17:22:07,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:07,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:07,924 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:08,098 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-07-09 17:22:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:08,099 INFO L225 Difference]: With dead ends: 83 [2021-07-09 17:22:08,099 INFO L226 Difference]: Without dead ends: 69 [2021-07-09 17:22:08,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-09 17:22:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-07-09 17:22:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-07-09 17:22:08,101 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-07-09 17:22:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:08,101 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-07-09 17:22:08,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-07-09 17:22:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:08,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:08,101 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:08,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-09 17:22:08,317 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-07-09 17:22:08,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:08,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127206935] [2021-07-09 17:22:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:08,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127206935] [2021-07-09 17:22:08,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127206935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905955147] [2021-07-09 17:22:08,374 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:08,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:08,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:08,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:08,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:08,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:08,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:08,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:08,732 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:08,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:08,762 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:08,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:08,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905955147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:08,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:08,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968922737] [2021-07-09 17:22:08,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:08,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:08,787 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:08,954 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-07-09 17:22:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:08,955 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:22:08,955 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:22:08,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:22:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-07-09 17:22:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-07-09 17:22:08,957 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-07-09 17:22:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:08,957 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-07-09 17:22:08,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-07-09 17:22:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:08,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:08,957 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:09,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,161 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-07-09 17:22:09,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:09,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860141110] [2021-07-09 17:22:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:09,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860141110] [2021-07-09 17:22:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860141110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559320930] [2021-07-09 17:22:09,229 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:09,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:09,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:09,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:09,407 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:09,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:09,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:09,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:09,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:22:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559320930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:09,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132122927] [2021-07-09 17:22:09,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:09,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:09,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:09,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:09,427 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:09,591 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2021-07-09 17:22:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:09,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:09,592 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:22:09,592 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:22:09,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:22:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-07-09 17:22:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-07-09 17:22:09,594 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-07-09 17:22:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:09,594 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-07-09 17:22:09,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-07-09 17:22:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:09,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:09,594 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:09,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 17:22:09,810 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:09,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-07-09 17:22:09,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:09,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027877138] [2021-07-09 17:22:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027877138] [2021-07-09 17:22:09,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027877138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642659433] [2021-07-09 17:22:09,889 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:22:09,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:10,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:10,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:10,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:10,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:10,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:10,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:10,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:10,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:10,154 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:10,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:10,181 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:10,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:10,181 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642659433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:10,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:10,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164286260] [2021-07-09 17:22:10,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:10,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:10,205 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:10,449 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2021-07-09 17:22:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:10,450 INFO L225 Difference]: With dead ends: 119 [2021-07-09 17:22:10,450 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:22:10,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:22:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-07-09 17:22:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-07-09 17:22:10,452 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-07-09 17:22:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:10,452 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-07-09 17:22:10,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-07-09 17:22:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:10,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:10,452 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:10,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,668 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-07-09 17:22:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:10,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916709531] [2021-07-09 17:22:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:10,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916709531] [2021-07-09 17:22:10,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916709531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955462965] [2021-07-09 17:22:10,734 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:10,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:10,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:10,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:11,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:11,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:11,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:11,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:11,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:11,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:11,048 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:11,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:11,081 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:11,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:11,081 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955462965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:11,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:11,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527525866] [2021-07-09 17:22:11,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:11,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:11,106 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:11,303 INFO L93 Difference]: Finished difference Result 98 states and 230 transitions. [2021-07-09 17:22:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:11,303 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:22:11,303 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:22:11,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:22:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-07-09 17:22:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-07-09 17:22:11,307 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-07-09 17:22:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:11,307 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-07-09 17:22:11,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-07-09 17:22:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:11,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:11,307 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:11,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-09 17:22:11,524 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-07-09 17:22:11,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:11,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444932341] [2021-07-09 17:22:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444932341] [2021-07-09 17:22:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444932341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943261567] [2021-07-09 17:22:11,591 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:11,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:11,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:11,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:11,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:11,771 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:11,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:11,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:11,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:11,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:22:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943261567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:11,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:11,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072728574] [2021-07-09 17:22:11,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:11,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:11,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:11,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:11,798 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:11,947 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-07-09 17:22:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:11,947 INFO L225 Difference]: With dead ends: 100 [2021-07-09 17:22:11,947 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:22:11,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:22:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-07-09 17:22:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-09 17:22:11,950 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-09 17:22:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:11,950 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-09 17:22:11,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-09 17:22:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:11,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:11,951 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:12,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,165 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-07-09 17:22:12,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:12,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461555823] [2021-07-09 17:22:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:12,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:12,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461555823] [2021-07-09 17:22:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461555823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577675490] [2021-07-09 17:22:12,222 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:12,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:12,474 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 44 [2021-07-09 17:22:12,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:12,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:12,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:12,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:12,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:12,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:12,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:12,593 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:12,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:12,622 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:12,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:12,622 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577675490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:12,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:12,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703897293] [2021-07-09 17:22:12,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:12,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:12,645 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:12,895 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-07-09 17:22:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:12,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:12,896 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:22:12,896 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:22:12,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:22:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-07-09 17:22:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-09 17:22:12,898 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-09 17:22:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:12,898 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-09 17:22:12,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-09 17:22:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:12,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:12,899 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:13,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-09 17:22:13,108 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-07-09 17:22:13,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:13,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347128806] [2021-07-09 17:22:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:13,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347128806] [2021-07-09 17:22:13,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347128806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143644737] [2021-07-09 17:22:13,173 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:13,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:13,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:13,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:13,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:13,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:13,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:13,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:13,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:13,413 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:13,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:13,442 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:13,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:13,443 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143644737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:13,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719300180] [2021-07-09 17:22:13,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:13,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:13,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:13,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:13,465 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:13,710 INFO L93 Difference]: Finished difference Result 104 states and 252 transitions. [2021-07-09 17:22:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:13,711 INFO L225 Difference]: With dead ends: 104 [2021-07-09 17:22:13,711 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 17:22:13,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 17:22:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-07-09 17:22:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-09 17:22:13,713 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-09 17:22:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:13,713 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-09 17:22:13,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-09 17:22:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:13,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:13,714 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:13,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-09 17:22:13,930 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-07-09 17:22:13,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:13,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097149733] [2021-07-09 17:22:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:13,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097149733] [2021-07-09 17:22:13,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097149733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328166576] [2021-07-09 17:22:13,996 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:14,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:14,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:14,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:14,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:14,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:14,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:14,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:14,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:14,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:14,285 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:14,300 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:14,313 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:14,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:14,313 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328166576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:14,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:14,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516573590] [2021-07-09 17:22:14,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:14,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:14,335 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:14,633 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2021-07-09 17:22:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:14,634 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:22:14,634 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 17:22:14,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 17:22:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-07-09 17:22:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-09 17:22:14,636 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-09 17:22:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:14,636 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-09 17:22:14,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-09 17:22:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:14,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:14,636 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:14,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-09 17:22:14,852 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-07-09 17:22:14,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:14,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279629092] [2021-07-09 17:22:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:14,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279629092] [2021-07-09 17:22:14,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279629092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692292] [2021-07-09 17:22:14,909 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:22:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:15,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:15,086 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:15,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:15,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:15,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:15,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:22:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:15,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316838268] [2021-07-09 17:22:15,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:15,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:15,110 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:15,247 INFO L93 Difference]: Finished difference Result 107 states and 266 transitions. [2021-07-09 17:22:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:15,248 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:22:15,248 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:22:15,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:22:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-07-09 17:22:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-09 17:22:15,250 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-09 17:22:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:15,251 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-09 17:22:15,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-09 17:22:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:15,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:15,251 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:15,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-07-09 17:22:15,464 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:15,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-07-09 17:22:15,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:15,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514819054] [2021-07-09 17:22:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:15,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514819054] [2021-07-09 17:22:15,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514819054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451124917] [2021-07-09 17:22:15,536 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:15,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:15,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:15,773 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 2072 DAG size of output: 44 [2021-07-09 17:22:15,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:15,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:15,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:15,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:15,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:15,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:15,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:15,890 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:15,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:15,917 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:15,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:15,918 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451124917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:15,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:15,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038417325] [2021-07-09 17:22:15,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:15,942 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:16,199 INFO L93 Difference]: Finished difference Result 129 states and 314 transitions. [2021-07-09 17:22:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:16,200 INFO L225 Difference]: With dead ends: 129 [2021-07-09 17:22:16,200 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:22:16,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:22:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-07-09 17:22:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-09 17:22:16,202 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-09 17:22:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:16,202 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-09 17:22:16,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-09 17:22:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:16,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:16,203 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:16,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,419 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:16,419 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-07-09 17:22:16,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:16,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516611304] [2021-07-09 17:22:16,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:16,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516611304] [2021-07-09 17:22:16,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516611304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762384315] [2021-07-09 17:22:16,482 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:17,482 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 45 [2021-07-09 17:22:17,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:17,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:17,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:17,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:17,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:17,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:17,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:17,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:17,609 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:17,629 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:17,642 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:17,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:17,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762384315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:17,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:17,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621916642] [2021-07-09 17:22:17,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:17,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:17,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:17,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:17,665 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:17,874 INFO L93 Difference]: Finished difference Result 111 states and 280 transitions. [2021-07-09 17:22:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:17,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:17,875 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:22:17,875 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:22:17,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:22:17,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-07-09 17:22:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-09 17:22:17,877 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-09 17:22:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:17,877 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-09 17:22:17,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-09 17:22:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:17,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:17,878 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:18,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-09 17:22:18,088 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-07-09 17:22:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:18,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711237610] [2021-07-09 17:22:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:18,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:18,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711237610] [2021-07-09 17:22:18,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711237610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461633836] [2021-07-09 17:22:18,147 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:18,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:18,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:18,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:18,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:18,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:18,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:18,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:18,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:18,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:18,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:18,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:18,390 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:18,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:18,420 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:18,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:18,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:18,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461633836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:18,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:18,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987195529] [2021-07-09 17:22:18,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:18,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:18,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:18,444 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:18,730 INFO L93 Difference]: Finished difference Result 125 states and 307 transitions. [2021-07-09 17:22:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:18,731 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:22:18,731 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:22:18,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:22:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-07-09 17:22:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-09 17:22:18,734 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-09 17:22:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:18,734 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-09 17:22:18,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-09 17:22:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:18,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:18,734 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:18,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 17:22:18,950 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-07-09 17:22:18,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:18,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931983266] [2021-07-09 17:22:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931983266] [2021-07-09 17:22:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931983266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923293664] [2021-07-09 17:22:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:19,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:19,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:19,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:19,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:19,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:19,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:19,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:19,268 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:19,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:19,294 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:19,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:19,295 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923293664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:19,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356824149] [2021-07-09 17:22:19,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:19,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:19,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:19,317 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:19,642 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2021-07-09 17:22:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:19,643 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:22:19,643 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:22:19,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:22:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:22:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-07-09 17:22:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-09 17:22:19,646 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-09 17:22:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:19,646 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-09 17:22:19,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-09 17:22:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:19,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:19,646 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-09 17:22:19,864 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-07-09 17:22:19,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788523716] [2021-07-09 17:22:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788523716] [2021-07-09 17:22:19,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788523716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951446816] [2021-07-09 17:22:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:19,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:20,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:20,137 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:20,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:20,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:20,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:20,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:22:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951446816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:20,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:20,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065762590] [2021-07-09 17:22:20,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:20,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:20,164 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:20,349 INFO L93 Difference]: Finished difference Result 117 states and 300 transitions. [2021-07-09 17:22:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:20,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:20,350 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:22:20,350 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 17:22:20,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 17:22:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-07-09 17:22:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-09 17:22:20,353 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-09 17:22:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:20,353 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-09 17:22:20,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-09 17:22:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:20,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:20,353 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:20,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 17:22:20,569 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:20,570 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-07-09 17:22:20,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:20,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740772802] [2021-07-09 17:22:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:20,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740772802] [2021-07-09 17:22:20,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740772802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650444652] [2021-07-09 17:22:20,625 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:20,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:20,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:20,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:20,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:20,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:20,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:20,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:20,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:20,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:20,959 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:20,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:20,986 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:20,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:20,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650444652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:21,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:21,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059518142] [2021-07-09 17:22:21,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:21,012 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:21,290 INFO L93 Difference]: Finished difference Result 141 states and 356 transitions. [2021-07-09 17:22:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:21,291 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:22:21,291 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:22:21,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:22:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-07-09 17:22:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-09 17:22:21,293 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-09 17:22:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:21,293 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-09 17:22:21,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-09 17:22:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:21,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:21,293 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:21,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:21,510 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-07-09 17:22:21,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:21,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251970242] [2021-07-09 17:22:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251970242] [2021-07-09 17:22:21,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251970242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492539312] [2021-07-09 17:22:21,568 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:21,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:21,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:21,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:21,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:21,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:21,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:21,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:21,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:21,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:21,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:21,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:21,858 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:21,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:21,885 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:21,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:21,885 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492539312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:21,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:21,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620573600] [2021-07-09 17:22:21,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:21,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:21,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:21,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:21,908 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:22,125 INFO L93 Difference]: Finished difference Result 128 states and 330 transitions. [2021-07-09 17:22:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:22,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:22,126 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:22:22,126 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:22:22,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:22:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-07-09 17:22:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-09 17:22:22,128 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-09 17:22:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:22,128 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-09 17:22:22,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-09 17:22:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:22,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:22,129 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:22,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,345 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-07-09 17:22:22,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:22,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388407445] [2021-07-09 17:22:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:22,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388407445] [2021-07-09 17:22:22,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388407445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910856271] [2021-07-09 17:22:22,399 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:22,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:22,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:22,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:22,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:22,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:22,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:22,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:22,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:22,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:22,626 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:22,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:22,658 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:22,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:22,658 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910856271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:22,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:22,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079352999] [2021-07-09 17:22:22,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:22,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:22,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:22,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:22,680 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:22,941 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2021-07-09 17:22:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:22,942 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:22:22,942 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 17:22:22,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 17:22:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-07-09 17:22:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-09 17:22:22,944 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-09 17:22:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:22,944 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-09 17:22:22,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-09 17:22:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:22,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:22,945 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:23,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:23,161 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-07-09 17:22:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004472019] [2021-07-09 17:22:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:23,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004472019] [2021-07-09 17:22:23,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004472019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115897889] [2021-07-09 17:22:23,229 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:23,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:23,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:23,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:23,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:23,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:23,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:23,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:23,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:23,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:23,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:23,479 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:23,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:23,503 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:23,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:23,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:23,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115897889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:23,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:23,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952419275] [2021-07-09 17:22:23,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:23,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:23,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:23,525 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:23,864 INFO L93 Difference]: Finished difference Result 154 states and 387 transitions. [2021-07-09 17:22:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:23,865 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:22:23,865 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:22:23,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:22:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:22:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-07-09 17:22:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-09 17:22:23,867 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-09 17:22:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:23,867 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-09 17:22:23,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-09 17:22:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:22:23,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:23,868 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:24,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,077 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-07-09 17:22:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:24,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456323923] [2021-07-09 17:22:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:24,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:24,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456323923] [2021-07-09 17:22:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456323923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855307337] [2021-07-09 17:22:24,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:24,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:22:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:24,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:22:24,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:24,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:24,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:24,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:24,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:24,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:24,458 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:22:24,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:24,483 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:22:24,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:24,484 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-09 17:22:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:24,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855307337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:24,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:24,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074666498] [2021-07-09 17:22:24,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:24,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:24,506 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:24,882 INFO L93 Difference]: Finished difference Result 159 states and 400 transitions. [2021-07-09 17:22:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:24,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:22:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:24,883 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:22:24,883 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:22:24,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:22:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:22:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-07-09 17:22:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-07-09 17:22:24,886 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-07-09 17:22:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:24,887 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-07-09 17:22:24,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-07-09 17:22:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:24,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:24,887 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:25,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-07-09 17:22:25,103 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-07-09 17:22:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:25,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201453627] [2021-07-09 17:22:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:25,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201453627] [2021-07-09 17:22:25,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201453627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210497163] [2021-07-09 17:22:25,193 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:25,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:25,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:25,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:25,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:25,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:25,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:25,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:25,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:25,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:25,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210497163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:25,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:25,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107634475] [2021-07-09 17:22:25,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:25,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:25,501 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:25,697 INFO L93 Difference]: Finished difference Result 123 states and 314 transitions. [2021-07-09 17:22:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:25,698 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:22:25,698 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 17:22:25,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:22:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 17:22:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-07-09 17:22:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-07-09 17:22:25,700 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-07-09 17:22:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:25,701 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-07-09 17:22:25,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-07-09 17:22:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:25,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:25,701 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:25,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:25,902 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-07-09 17:22:25,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:25,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595808950] [2021-07-09 17:22:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595808950] [2021-07-09 17:22:25,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595808950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089678075] [2021-07-09 17:22:25,988 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:26,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:26,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:26,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:26,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:26,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:26,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:26,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089678075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:26,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:26,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570872957] [2021-07-09 17:22:26,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:26,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:26,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:26,250 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:26,502 INFO L93 Difference]: Finished difference Result 118 states and 307 transitions. [2021-07-09 17:22:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:26,503 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:22:26,503 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 17:22:26,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 17:22:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-07-09 17:22:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-07-09 17:22:26,505 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-07-09 17:22:26,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:26,505 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-07-09 17:22:26,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-07-09 17:22:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:26,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:26,506 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:26,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-07-09 17:22:26,722 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-07-09 17:22:26,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:26,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737054500] [2021-07-09 17:22:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:26,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737054500] [2021-07-09 17:22:26,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737054500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270133503] [2021-07-09 17:22:26,818 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:26,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:26,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:26,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:26,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:27,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:27,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:27,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:27,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:27,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:27,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:27,579 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:27,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:27,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:27,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270133503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:27,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:27,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:27,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731745327] [2021-07-09 17:22:27,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:27,608 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:27,841 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2021-07-09 17:22:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:27,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:27,842 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:22:27,842 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:22:27,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:22:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-07-09 17:22:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-07-09 17:22:27,845 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-07-09 17:22:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:27,845 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-07-09 17:22:27,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-07-09 17:22:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:27,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:27,845 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:28,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:28,061 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-07-09 17:22:28,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:28,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052792060] [2021-07-09 17:22:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:28,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052792060] [2021-07-09 17:22:28,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052792060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691613340] [2021-07-09 17:22:28,128 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:28,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:28,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:28,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:28,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:28,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:28,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:28,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:28,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:28,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:28,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:28,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:29,308 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 234 [2021-07-09 17:22:29,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:30,010 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:30,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:30,010 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691613340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:30,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:30,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529849325] [2021-07-09 17:22:30,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:30,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:30,035 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:30,384 INFO L93 Difference]: Finished difference Result 156 states and 373 transitions. [2021-07-09 17:22:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:30,385 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:22:30,385 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:22:30,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:22:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-07-09 17:22:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-07-09 17:22:30,387 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-07-09 17:22:30,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:30,387 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-07-09 17:22:30,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-07-09 17:22:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:30,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:30,388 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:30,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-07-09 17:22:30,597 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-07-09 17:22:30,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:30,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100281094] [2021-07-09 17:22:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:30,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100281094] [2021-07-09 17:22:30,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100281094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482783249] [2021-07-09 17:22:30,635 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:30,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:30,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:30,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482783249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:30,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:30,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360102520] [2021-07-09 17:22:30,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:30,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:30,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:30,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:30,683 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:30,733 INFO L93 Difference]: Finished difference Result 216 states and 471 transitions. [2021-07-09 17:22:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:30,734 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:22:30,734 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:22:30,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:22:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-07-09 17:22:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-07-09 17:22:30,737 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-07-09 17:22:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:30,737 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-07-09 17:22:30,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-07-09 17:22:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:30,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:30,737 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:30,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-07-09 17:22:30,953 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-07-09 17:22:30,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:30,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121807709] [2021-07-09 17:22:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:31,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:31,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121807709] [2021-07-09 17:22:31,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121807709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:31,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210868681] [2021-07-09 17:22:31,104 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:31,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:31,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:31,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:31,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:31,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:31,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:31,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:31,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210868681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:31,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:31,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:31,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773506211] [2021-07-09 17:22:31,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:31,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:31,440 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:31,694 INFO L93 Difference]: Finished difference Result 126 states and 330 transitions. [2021-07-09 17:22:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:31,695 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:22:31,695 INFO L226 Difference]: Without dead ends: 117 [2021-07-09 17:22:31,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-09 17:22:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-07-09 17:22:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-07-09 17:22:31,697 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-07-09 17:22:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:31,698 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-07-09 17:22:31,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-07-09 17:22:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:31,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:31,698 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:31,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-07-09 17:22:31,904 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-07-09 17:22:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:31,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070911316] [2021-07-09 17:22:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:32,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070911316] [2021-07-09 17:22:32,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070911316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238504515] [2021-07-09 17:22:32,078 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:32,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:32,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:32,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:32,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:32,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:32,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:32,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:32,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:32,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:32,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:33,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:33,147 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:33,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:33,148 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:33,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238504515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:33,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:33,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188658003] [2021-07-09 17:22:33,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:33,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:33,175 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:33,427 INFO L93 Difference]: Finished difference Result 150 states and 373 transitions. [2021-07-09 17:22:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:33,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:33,428 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:22:33,428 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 17:22:33,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 17:22:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-07-09 17:22:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-07-09 17:22:33,430 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-07-09 17:22:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:33,431 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-07-09 17:22:33,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-07-09 17:22:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:33,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:33,431 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:33,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-07-09 17:22:33,648 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:33,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-07-09 17:22:33,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:33,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822184228] [2021-07-09 17:22:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:33,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:33,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822184228] [2021-07-09 17:22:33,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822184228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825723983] [2021-07-09 17:22:33,745 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:33,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:33,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:33,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:33,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:33,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:34,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:34,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:34,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:34,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:34,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:34,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:35,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:35,027 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:35,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:35,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825723983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:35,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:35,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:35,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494769919] [2021-07-09 17:22:35,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:35,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:35,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:35,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:35,052 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:35,318 INFO L93 Difference]: Finished difference Result 171 states and 410 transitions. [2021-07-09 17:22:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:22:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:35,319 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:22:35,319 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:22:35,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:22:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:22:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-07-09 17:22:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-07-09 17:22:35,322 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-07-09 17:22:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:35,322 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-07-09 17:22:35,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-07-09 17:22:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:35,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:35,322 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:35,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-07-09 17:22:35,540 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:35,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-07-09 17:22:35,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:35,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633311996] [2021-07-09 17:22:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:35,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:35,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633311996] [2021-07-09 17:22:35,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633311996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:35,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336733559] [2021-07-09 17:22:35,630 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:35,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:35,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:35,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:35,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:35,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:35,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:35,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:35,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:36,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:36,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:36,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:36,840 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 279 [2021-07-09 17:22:37,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:37,634 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:37,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:37,635 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:37,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336733559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:37,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:37,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:37,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051790895] [2021-07-09 17:22:37,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:37,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:37,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:37,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:37,660 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:38,111 INFO L93 Difference]: Finished difference Result 188 states and 439 transitions. [2021-07-09 17:22:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:38,112 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:22:38,112 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:22:38,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:22:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:22:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-07-09 17:22:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-07-09 17:22:38,115 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-07-09 17:22:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:38,115 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-07-09 17:22:38,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-07-09 17:22:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:38,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:38,116 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:38,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-07-09 17:22:38,316 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-07-09 17:22:38,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:38,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914266721] [2021-07-09 17:22:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:38,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:38,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914266721] [2021-07-09 17:22:38,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914266721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:38,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094532275] [2021-07-09 17:22:38,346 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:38,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:38,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094532275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:38,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:38,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:38,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759722718] [2021-07-09 17:22:38,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:38,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:38,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:38,397 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:38,458 INFO L93 Difference]: Finished difference Result 260 states and 558 transitions. [2021-07-09 17:22:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:38,460 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:22:38,460 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:22:38,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:22:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-07-09 17:22:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-07-09 17:22:38,462 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-07-09 17:22:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:38,463 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-07-09 17:22:38,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-07-09 17:22:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:38,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:38,463 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:38,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1983 [2021-07-09 17:22:38,679 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:38,679 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-07-09 17:22:38,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:38,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682509521] [2021-07-09 17:22:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:38,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:38,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682509521] [2021-07-09 17:22:38,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682509521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:38,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641637455] [2021-07-09 17:22:38,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:38,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:38,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:38,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:39,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:39,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:39,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:39,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:39,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:39,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:39,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641637455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:39,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:39,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418184944] [2021-07-09 17:22:39,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:39,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:39,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:39,077 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:39,325 INFO L93 Difference]: Finished difference Result 136 states and 365 transitions. [2021-07-09 17:22:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:39,326 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:22:39,326 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:22:39,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:22:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-07-09 17:22:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-09 17:22:39,328 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-09 17:22:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:39,328 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-09 17:22:39,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-09 17:22:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:39,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:39,329 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:39,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:39,545 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:39,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-07-09 17:22:39,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:39,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614642283] [2021-07-09 17:22:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:39,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614642283] [2021-07-09 17:22:39,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614642283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110660849] [2021-07-09 17:22:39,702 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:22:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:39,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:39,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:39,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:39,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:39,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:39,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:40,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:40,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:40,735 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 227 [2021-07-09 17:22:41,717 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-07-09 17:22:41,849 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-07-09 17:22:41,983 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 299 [2021-07-09 17:22:42,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:42,377 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:42,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:42,378 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:42,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110660849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:42,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:42,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421003220] [2021-07-09 17:22:42,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:42,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:42,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:42,402 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:42,681 INFO L93 Difference]: Finished difference Result 163 states and 416 transitions. [2021-07-09 17:22:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:42,682 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:22:42,682 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:22:42,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:22:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-07-09 17:22:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-09 17:22:42,684 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-09 17:22:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:42,685 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-09 17:22:42,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-09 17:22:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:42,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:42,685 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:42,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2005 [2021-07-09 17:22:42,901 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-07-09 17:22:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:42,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629868910] [2021-07-09 17:22:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:42,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629868910] [2021-07-09 17:22:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629868910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:42,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923359001] [2021-07-09 17:22:42,985 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:43,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:43,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:43,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:43,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:43,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:43,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:43,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:43,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:43,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:44,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:44,443 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:44,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:44,443 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:44,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923359001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:44,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:44,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496743596] [2021-07-09 17:22:44,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:44,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:44,468 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:44,827 INFO L93 Difference]: Finished difference Result 192 states and 470 transitions. [2021-07-09 17:22:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:44,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:44,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:44,828 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:22:44,828 INFO L226 Difference]: Without dead ends: 182 [2021-07-09 17:22:44,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:22:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-09 17:22:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-07-09 17:22:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-09 17:22:44,831 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-09 17:22:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:44,831 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-09 17:22:44,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-09 17:22:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:44,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:44,831 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:45,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:45,041 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-07-09 17:22:45,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:45,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793784236] [2021-07-09 17:22:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:45,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:45,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793784236] [2021-07-09 17:22:45,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793784236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:45,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773275347] [2021-07-09 17:22:45,122 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:45,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:45,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:45,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:45,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:45,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:45,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:45,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:45,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:45,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:45,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:45,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:45,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:46,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:46,271 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:46,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:46,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:46,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773275347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:46,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:46,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:46,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642817813] [2021-07-09 17:22:46,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:46,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:46,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:46,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:46,298 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:46,778 INFO L93 Difference]: Finished difference Result 205 states and 493 transitions. [2021-07-09 17:22:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:46,779 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:22:46,779 INFO L226 Difference]: Without dead ends: 195 [2021-07-09 17:22:46,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:22:46,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-09 17:22:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-07-09 17:22:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-09 17:22:46,782 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-09 17:22:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:46,782 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-09 17:22:46,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-09 17:22:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:46,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:46,783 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:46,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2691 [2021-07-09 17:22:46,990 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:46,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:46,990 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-07-09 17:22:46,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:46,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141153143] [2021-07-09 17:22:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:47,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:47,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141153143] [2021-07-09 17:22:47,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141153143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:47,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993920451] [2021-07-09 17:22:47,076 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:47,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:47,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:47,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:47,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:47,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:47,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:47,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:47,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:47,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:47,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:47,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:48,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:48,893 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:48,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:48,894 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:48,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993920451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:48,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:48,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147466549] [2021-07-09 17:22:48,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:48,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:48,920 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:49,346 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-07-09 17:22:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:49,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:49,347 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:22:49,347 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:22:49,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:22:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:22:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-07-09 17:22:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-07-09 17:22:49,349 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-07-09 17:22:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:49,349 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-07-09 17:22:49,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-07-09 17:22:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:49,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:49,350 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:49,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:49,557 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-07-09 17:22:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:49,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432898575] [2021-07-09 17:22:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:49,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:49,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432898575] [2021-07-09 17:22:49,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432898575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:49,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385916520] [2021-07-09 17:22:49,587 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:49,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:49,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:49,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:49,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385916520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:49,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:49,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:49,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737032970] [2021-07-09 17:22:49,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:49,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:49,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:49,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:49,638 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:49,726 INFO L93 Difference]: Finished difference Result 247 states and 556 transitions. [2021-07-09 17:22:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:49,728 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:22:49,728 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:22:49,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:22:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-07-09 17:22:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-07-09 17:22:49,730 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-07-09 17:22:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:49,730 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-07-09 17:22:49,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-07-09 17:22:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:49,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:49,731 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:49,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:49,945 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-07-09 17:22:49,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:49,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036557384] [2021-07-09 17:22:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:50,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:50,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036557384] [2021-07-09 17:22:50,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036557384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:50,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68640345] [2021-07-09 17:22:50,129 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:50,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:50,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:50,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:50,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:50,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:50,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:50,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:50,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:50,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:50,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68640345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:50,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:50,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:50,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938731405] [2021-07-09 17:22:50,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:50,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:50,360 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:50,644 INFO L93 Difference]: Finished difference Result 150 states and 406 transitions. [2021-07-09 17:22:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:50,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:50,645 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:22:50,645 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:22:50,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:22:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-07-09 17:22:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-09 17:22:50,656 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-09 17:22:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:50,656 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-09 17:22:50,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-09 17:22:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:50,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:50,657 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:50,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:50,873 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-07-09 17:22:50,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:50,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345851011] [2021-07-09 17:22:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:51,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345851011] [2021-07-09 17:22:51,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345851011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489630694] [2021-07-09 17:22:51,059 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:51,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:51,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:51,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:51,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:51,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:51,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:51,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:51,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:51,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:51,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:52,715 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 285 [2021-07-09 17:22:52,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:52,989 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:52,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:52,990 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:53,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489630694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:53,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:53,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:53,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295109334] [2021-07-09 17:22:53,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:53,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:53,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:53,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:53,017 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:53,324 INFO L93 Difference]: Finished difference Result 179 states and 464 transitions. [2021-07-09 17:22:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:53,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:53,325 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:22:53,325 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:22:53,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:22:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:22:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-07-09 17:22:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-09 17:22:53,341 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-09 17:22:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:53,342 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-09 17:22:53,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-09 17:22:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:53,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:53,342 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:53,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-07-09 17:22:53,543 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-07-09 17:22:53,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:53,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121990640] [2021-07-09 17:22:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:53,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121990640] [2021-07-09 17:22:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121990640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040123236] [2021-07-09 17:22:53,638 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:53,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:53,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:53,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:53,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:53,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:53,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:53,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:54,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:54,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:54,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:54,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:54,871 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:54,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:54,872 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:54,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040123236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:54,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:54,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:54,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820248223] [2021-07-09 17:22:54,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:54,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:54,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:54,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:54,897 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:55,298 INFO L93 Difference]: Finished difference Result 203 states and 504 transitions. [2021-07-09 17:22:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:22:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:55,299 INFO L225 Difference]: With dead ends: 203 [2021-07-09 17:22:55,299 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:22:55,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:22:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:22:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-07-09 17:22:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-09 17:22:55,302 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-09 17:22:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:55,302 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-09 17:22:55,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-09 17:22:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:55,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:55,302 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:55,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:55,519 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:55,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-07-09 17:22:55,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:55,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024686507] [2021-07-09 17:22:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:55,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024686507] [2021-07-09 17:22:55,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024686507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833292127] [2021-07-09 17:22:55,600 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:55,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:55,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:55,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:55,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:55,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:55,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:55,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:55,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:55,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:56,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:56,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:56,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:56,971 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:56,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:56,972 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:56,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833292127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:56,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:56,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:56,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174240456] [2021-07-09 17:22:56,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:56,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:56,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:56,997 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:57,531 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-07-09 17:22:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:57,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:57,533 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:22:57,533 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:22:57,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:22:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:22:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-07-09 17:22:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-09 17:22:57,535 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-09 17:22:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:57,535 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-09 17:22:57,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-09 17:22:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:57,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:57,536 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:57,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-07-09 17:22:57,745 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-07-09 17:22:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:57,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959474867] [2021-07-09 17:22:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:57,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:57,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959474867] [2021-07-09 17:22:57,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959474867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:57,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516065609] [2021-07-09 17:22:57,828 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:57,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:57,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:57,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:58,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:58,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:58,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:58,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:58,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:22:58,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:58,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:58,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:22:58,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:58,767 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:22:58,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:58,768 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:22:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:58,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516065609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:58,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:58,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:58,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973983408] [2021-07-09 17:22:58,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:58,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:58,793 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:59,216 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-07-09 17:22:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:59,217 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:22:59,217 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:22:59,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:22:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:22:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-07-09 17:22:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-09 17:22:59,220 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-09 17:22:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:59,220 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-09 17:22:59,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-09 17:22:59,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:59,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:59,220 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:59,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-07-09 17:22:59,434 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:59,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-07-09 17:22:59,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:59,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479149075] [2021-07-09 17:22:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:59,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:59,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479149075] [2021-07-09 17:22:59,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479149075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:59,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629703317] [2021-07-09 17:22:59,519 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:59,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:59,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:59,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:22:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:59,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:59,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:59,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:23:00,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:00,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:23:00,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:00,655 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:23:00,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:00,656 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:23:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:00,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629703317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:00,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:00,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:00,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825720167] [2021-07-09 17:23:00,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:00,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:00,682 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:01,198 INFO L93 Difference]: Finished difference Result 186 states and 464 transitions. [2021-07-09 17:23:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:01,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:01,199 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:23:01,199 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:23:01,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 640.4ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:23:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:23:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-07-09 17:23:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-07-09 17:23:01,201 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-07-09 17:23:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:01,201 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-07-09 17:23:01,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-07-09 17:23:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:01,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:01,202 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:01,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-07-09 17:23:01,409 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-07-09 17:23:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:01,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304899293] [2021-07-09 17:23:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:01,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:01,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304899293] [2021-07-09 17:23:01,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304899293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:01,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682432765] [2021-07-09 17:23:01,440 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 [2021-07-09 17:23:01,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:23:01,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:01,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:23:01,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682432765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:01,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:01,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:23:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25462765] [2021-07-09 17:23:01,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:01,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:01,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:01,491 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:01,604 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2021-07-09 17:23:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:23:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:01,605 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:23:01,605 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:23:01,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:23:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-07-09 17:23:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-07-09 17:23:01,608 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-07-09 17:23:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:01,608 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-07-09 17:23:01,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-07-09 17:23:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:01,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:01,608 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:01,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:01,825 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-07-09 17:23:01,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:01,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687117679] [2021-07-09 17:23:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:01,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:01,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687117679] [2021-07-09 17:23:01,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687117679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:01,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737484837] [2021-07-09 17:23:01,977 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 [2021-07-09 17:23:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:01,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:23:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:02,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:02,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:23:02,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:02,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:02,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:02,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:23:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:02,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737484837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:02,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:02,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:02,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846453081] [2021-07-09 17:23:02,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:02,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:02,243 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:02,447 INFO L93 Difference]: Finished difference Result 164 states and 445 transitions. [2021-07-09 17:23:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:23:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:02,448 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:23:02,448 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:23:02,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:23:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-07-09 17:23:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-07-09 17:23:02,450 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-07-09 17:23:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:02,450 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-07-09 17:23:02,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-07-09 17:23:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:02,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:02,451 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:02,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:02,667 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:02,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-07-09 17:23:02,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:02,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752420809] [2021-07-09 17:23:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:02,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:02,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752420809] [2021-07-09 17:23:02,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752420809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:02,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759364186] [2021-07-09 17:23:02,812 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:02,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:02,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:02,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:23:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:02,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:02,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:23:03,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:03,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:23:03,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:03,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:23:04,543 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 313 [2021-07-09 17:23:04,685 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-07-09 17:23:04,823 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-07-09 17:23:04,983 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 329 [2021-07-09 17:23:05,133 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 327 [2021-07-09 17:23:05,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:05,509 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:23:05,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:05,510 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:23:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:05,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759364186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:05,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:05,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:05,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256772171] [2021-07-09 17:23:05,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:05,536 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:05,858 INFO L93 Difference]: Finished difference Result 199 states and 522 transitions. [2021-07-09 17:23:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:05,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:05,859 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:23:05,859 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:23:05,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:23:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-07-09 17:23:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-07-09 17:23:05,862 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-07-09 17:23:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:05,862 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-07-09 17:23:05,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-07-09 17:23:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:05,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:05,862 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:06,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4334,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:06,079 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-07-09 17:23:06,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:06,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684304246] [2021-07-09 17:23:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:06,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684304246] [2021-07-09 17:23:06,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684304246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334798352] [2021-07-09 17:23:06,169 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:06,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:06,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:06,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:23:06,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:06,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:06,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:23:06,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:06,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:06,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:23:06,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:06,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:06,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:23:08,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:08,080 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:23:08,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:08,081 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:23:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:08,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334798352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:08,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:08,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:08,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219152628] [2021-07-09 17:23:08,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:08,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:08,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:08,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:08,107 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:08,579 INFO L93 Difference]: Finished difference Result 222 states and 560 transitions. [2021-07-09 17:23:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:23:08,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:08,580 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:23:08,580 INFO L226 Difference]: Without dead ends: 212 [2021-07-09 17:23:08,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:23:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-09 17:23:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-07-09 17:23:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-07-09 17:23:08,582 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-07-09 17:23:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:08,583 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-07-09 17:23:08,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-07-09 17:23:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:08,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:08,583 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:08,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-07-09 17:23:08,793 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-07-09 17:23:08,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:08,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227072566] [2021-07-09 17:23:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:08,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:08,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227072566] [2021-07-09 17:23:08,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227072566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:08,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884927338] [2021-07-09 17:23:08,827 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:08,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:08,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:08,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:23:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:08,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884927338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:08,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:08,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:23:08,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671474898] [2021-07-09 17:23:08,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:23:08,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:23:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:23:08,875 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-07-09 17:23:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:08,913 INFO L93 Difference]: Finished difference Result 273 states and 654 transitions. [2021-07-09 17:23:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-07-09 17:23:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:08,914 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:23:08,914 INFO L226 Difference]: Without dead ends: 273 [2021-07-09 17:23:08,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-09 17:23:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-07-09 17:23:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-07-09 17:23:08,917 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-07-09 17:23:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:08,917 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-07-09 17:23:08,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-07-09 17:23:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-07-09 17:23:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:08,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:08,918 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:09,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-07-09 17:23:09,135 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:09,135 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-07-09 17:23:09,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:09,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917572743] [2021-07-09 17:23:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:09,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:09,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917572743] [2021-07-09 17:23:09,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917572743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:09,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531223423] [2021-07-09 17:23:09,205 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:09,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:23:09,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:09,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:23:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:09,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:09,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:23:09,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:09,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:09,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:23:09,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:09,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:09,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:23:10,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:10,296 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:23:10,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:10,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:23:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:10,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531223423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:10,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:10,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:10,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940630487] [2021-07-09 17:23:10,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:10,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:10,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:10,344 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:10,893 INFO L93 Difference]: Finished difference Result 273 states and 689 transitions. [2021-07-09 17:23:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:23:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:10,894 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:23:10,894 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:23:10,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:23:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:23:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-07-09 17:23:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-07-09 17:23:10,897 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-07-09 17:23:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:10,897 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-07-09 17:23:10,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-07-09 17:23:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:10,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:10,898 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:11,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:11,098 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-07-09 17:23:11,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:11,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673376928] [2021-07-09 17:23:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:11,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:11,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673376928] [2021-07-09 17:23:11,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673376928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:11,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281077718] [2021-07-09 17:23:11,130 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:11,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:11,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:11,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:23:11,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:11,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281077718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:11,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:11,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:23:11,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342571210] [2021-07-09 17:23:11,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:11,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:11,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:11,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:11,184 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:11,245 INFO L93 Difference]: Finished difference Result 300 states and 694 transitions. [2021-07-09 17:23:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:23:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-09 17:23:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:11,246 INFO L225 Difference]: With dead ends: 300 [2021-07-09 17:23:11,246 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:23:11,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:23:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-07-09 17:23:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-07-09 17:23:11,249 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-07-09 17:23:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:11,250 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-07-09 17:23:11,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-07-09 17:23:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:11,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:11,250 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:11,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5248,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:11,467 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:11,467 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-07-09 17:23:11,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:11,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282770051] [2021-07-09 17:23:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:11,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282770051] [2021-07-09 17:23:11,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282770051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688385394] [2021-07-09 17:23:11,583 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:23:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:11,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:23:11,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:11,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:11,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:23:11,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:12,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:12,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:23:12,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:12,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:12,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:23:13,241 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 272 [2021-07-09 17:23:13,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:13,574 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:23:13,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:13,575 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:23:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688385394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:13,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:13,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823244400] [2021-07-09 17:23:13,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:13,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:13,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:13,599 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:14,058 INFO L93 Difference]: Finished difference Result 242 states and 614 transitions. [2021-07-09 17:23:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:23:14,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:14,059 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:23:14,059 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:23:14,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:23:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:23:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-07-09 17:23:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-07-09 17:23:14,062 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-07-09 17:23:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:14,062 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-07-09 17:23:14,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-07-09 17:23:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:14,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:14,062 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:14,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5249,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:14,278 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-07-09 17:23:14,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:14,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020010437] [2021-07-09 17:23:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:14,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:14,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020010437] [2021-07-09 17:23:14,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020010437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:14,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037327716] [2021-07-09 17:23:14,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:14,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:14,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:14,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:23:14,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037327716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:14,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:14,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:23:14,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074619589] [2021-07-09 17:23:14,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:14,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:14,364 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:14,442 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-07-09 17:23:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:23:14,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-09 17:23:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:14,443 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:23:14,443 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:23:14,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:23:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:23:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-07-09 17:23:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-07-09 17:23:14,446 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-07-09 17:23:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:14,446 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-07-09 17:23:14,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-07-09 17:23:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:14,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:14,446 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:14,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5581,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:14,663 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:14,663 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-07-09 17:23:14,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:14,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119963737] [2021-07-09 17:23:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:14,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119963737] [2021-07-09 17:23:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119963737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921361307] [2021-07-09 17:23:14,735 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:14,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:14,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:23:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:14,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:23:15,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:15,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:15,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:23:15,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:15,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:15,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:23:16,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:16,774 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:23:16,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:16,774 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:23:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:16,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921361307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:16,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:16,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:16,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408462326] [2021-07-09 17:23:16,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:16,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:16,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:16,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:16,799 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:17,354 INFO L93 Difference]: Finished difference Result 233 states and 590 transitions. [2021-07-09 17:23:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:17,355 INFO L225 Difference]: With dead ends: 233 [2021-07-09 17:23:17,355 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:23:17,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:23:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:23:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-07-09 17:23:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-07-09 17:23:17,358 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-07-09 17:23:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:17,358 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-07-09 17:23:17,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-07-09 17:23:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:17,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:17,358 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:17,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5582,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:17,559 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:17,559 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-07-09 17:23:17,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:17,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334823644] [2021-07-09 17:23:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:17,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:17,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334823644] [2021-07-09 17:23:17,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334823644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:17,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162915031] [2021-07-09 17:23:17,591 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:17,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:17,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:17,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:23:17,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162915031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:17,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:17,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:23:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739795377] [2021-07-09 17:23:17,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:17,642 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:17,745 INFO L93 Difference]: Finished difference Result 257 states and 618 transitions. [2021-07-09 17:23:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:23:17,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-09 17:23:17,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:17,746 INFO L225 Difference]: With dead ends: 257 [2021-07-09 17:23:17,746 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 17:23:17,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 17:23:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-07-09 17:23:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-07-09 17:23:17,749 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-07-09 17:23:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:17,749 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-07-09 17:23:17,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-07-09 17:23:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:17,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:17,749 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:17,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5917 [2021-07-09 17:23:17,952 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-07-09 17:23:17,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:17,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131785177] [2021-07-09 17:23:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:18,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:18,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131785177] [2021-07-09 17:23:18,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131785177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:18,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366283853] [2021-07-09 17:23:18,032 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:18,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:18,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:18,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:23:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:18,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:18,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:23:18,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:18,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:18,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-09 17:23:18,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:18,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:18,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-09 17:23:19,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:19,639 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-09 17:23:19,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:19,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-09 17:23:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:19,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366283853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:19,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:19,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:23:19,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863451216] [2021-07-09 17:23:19,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:23:19,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:23:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:19,665 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,273 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-07-09 17:23:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:23:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:20,274 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:23:20,274 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:23:20,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:23:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:23:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-07-09 17:23:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-07-09 17:23:20,277 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-07-09 17:23:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:20,277 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-07-09 17:23:20,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-07-09 17:23:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:23:20,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:20,278 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:20,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5918 [2021-07-09 17:23:20,479 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:20,479 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-07-09 17:23:20,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:20,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411395928] [2021-07-09 17:23:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:20,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411395928] [2021-07-09 17:23:20,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411395928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:20,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651777900] [2021-07-09 17:23:20,516 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:20,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:23:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651777900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:20,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:20,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:23:20,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064885190] [2021-07-09 17:23:20,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:20,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:20,569 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,682 INFO L93 Difference]: Finished difference Result 283 states and 699 transitions. [2021-07-09 17:23:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:23:20,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-09 17:23:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:20,683 INFO L225 Difference]: With dead ends: 283 [2021-07-09 17:23:20,683 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 17:23:20,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 17:23:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-07-09 17:23:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-07-09 17:23:20,686 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-07-09 17:23:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:20,687 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-07-09 17:23:20,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-07-09 17:23:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:20,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:20,687 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:20,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6233,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:20,904 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:20,904 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-07-09 17:23:20,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:20,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55731340] [2021-07-09 17:23:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:20,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55731340] [2021-07-09 17:23:20,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55731340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:20,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972088867] [2021-07-09 17:23:20,995 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:21,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:21,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:21,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:21,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:21,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:21,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:21,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:21,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972088867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:21,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:21,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:21,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904973137] [2021-07-09 17:23:21,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:21,505 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:21,734 INFO L93 Difference]: Finished difference Result 212 states and 582 transitions. [2021-07-09 17:23:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:21,744 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:23:21,744 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:23:21,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:23:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-07-09 17:23:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-07-09 17:23:21,747 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-07-09 17:23:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:21,747 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-07-09 17:23:21,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-07-09 17:23:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:21,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:21,747 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:21,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6234 [2021-07-09 17:23:21,948 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-07-09 17:23:21,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:21,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628418117] [2021-07-09 17:23:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:22,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:22,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628418117] [2021-07-09 17:23:22,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628418117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854899961] [2021-07-09 17:23:22,072 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:22,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:22,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:22,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:22,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:22,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:22,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:22,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:22,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:22,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:22,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:22,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854899961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:22,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:22,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152783687] [2021-07-09 17:23:22,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:22,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:22,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:22,526 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:22,809 INFO L93 Difference]: Finished difference Result 207 states and 575 transitions. [2021-07-09 17:23:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:22,810 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:23:22,810 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:23:22,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:23:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-07-09 17:23:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-07-09 17:23:22,825 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-07-09 17:23:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:22,825 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-07-09 17:23:22,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-07-09 17:23:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:22,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:22,826 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:23,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6318,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:23,041 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-07-09 17:23:23,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:23,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98649241] [2021-07-09 17:23:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:23,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:23,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98649241] [2021-07-09 17:23:23,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98649241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:23,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816478595] [2021-07-09 17:23:23,143 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:23,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:23,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:23,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:23,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:23:24,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:24,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:24,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:24,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:24,920 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:23:24,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:24,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-09 17:23:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:24,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816478595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:24,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:24,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285974209] [2021-07-09 17:23:24,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:24,947 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:25,235 INFO L93 Difference]: Finished difference Result 235 states and 628 transitions. [2021-07-09 17:23:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:25,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:25,236 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:23:25,236 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:23:25,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:23:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-07-09 17:23:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-07-09 17:23:25,252 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-07-09 17:23:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:25,253 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-07-09 17:23:25,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-07-09 17:23:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:25,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:25,253 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:25,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6354 [2021-07-09 17:23:25,469 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-07-09 17:23:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:25,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504749487] [2021-07-09 17:23:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:25,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504749487] [2021-07-09 17:23:25,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504749487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810020990] [2021-07-09 17:23:25,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:25,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:25,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:25,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:25,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:23:26,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:26,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:26,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:26,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:26,590 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:23:26,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:26,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-09 17:23:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:26,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810020990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:26,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:26,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:26,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640748973] [2021-07-09 17:23:26,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:26,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:26,615 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:27,039 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2021-07-09 17:23:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:23:27,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:27,040 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:23:27,040 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 17:23:27,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:23:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 17:23:27,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-07-09 17:23:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-07-09 17:23:27,043 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-07-09 17:23:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:27,043 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-07-09 17:23:27,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-07-09 17:23:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:27,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:27,044 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6658,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,253 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-07-09 17:23:27,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959332828] [2021-07-09 17:23:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:27,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959332828] [2021-07-09 17:23:27,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959332828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814349441] [2021-07-09 17:23:27,287 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:27,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:27,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:27,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814349441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:27,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:23:27,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311720786] [2021-07-09 17:23:27,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:27,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:27,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:27,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:27,341 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:27,392 INFO L93 Difference]: Finished difference Result 357 states and 825 transitions. [2021-07-09 17:23:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:23:27,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-09 17:23:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:27,394 INFO L225 Difference]: With dead ends: 357 [2021-07-09 17:23:27,394 INFO L226 Difference]: Without dead ends: 357 [2021-07-09 17:23:27,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-09 17:23:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-07-09 17:23:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-07-09 17:23:27,397 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-07-09 17:23:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:27,397 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-07-09 17:23:27,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-07-09 17:23:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:27,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:27,397 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6824 [2021-07-09 17:23:27,614 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-07-09 17:23:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412339809] [2021-07-09 17:23:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:27,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412339809] [2021-07-09 17:23:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412339809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864371044] [2021-07-09 17:23:27,646 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:27,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:27,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864371044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:27,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:23:27,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023619837] [2021-07-09 17:23:27,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:27,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:27,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:27,695 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:27,745 INFO L93 Difference]: Finished difference Result 374 states and 857 transitions. [2021-07-09 17:23:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-09 17:23:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:27,746 INFO L225 Difference]: With dead ends: 374 [2021-07-09 17:23:27,746 INFO L226 Difference]: Without dead ends: 374 [2021-07-09 17:23:27,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-09 17:23:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-07-09 17:23:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-07-09 17:23:27,749 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-07-09 17:23:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:27,749 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-07-09 17:23:27,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-07-09 17:23:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:27,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:27,750 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6825,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,966 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-07-09 17:23:27,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492280052] [2021-07-09 17:23:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:28,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:28,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492280052] [2021-07-09 17:23:28,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492280052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:28,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102320885] [2021-07-09 17:23:28,151 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:28,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:28,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:28,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:28,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:28,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:28,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:28,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:28,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102320885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:28,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:28,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820683752] [2021-07-09 17:23:28,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:28,464 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:28,699 INFO L93 Difference]: Finished difference Result 202 states and 560 transitions. [2021-07-09 17:23:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:28,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:28,701 INFO L225 Difference]: With dead ends: 202 [2021-07-09 17:23:28,701 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:23:28,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:23:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:23:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-07-09 17:23:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-07-09 17:23:28,718 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-07-09 17:23:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:28,719 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-07-09 17:23:28,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-07-09 17:23:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:28,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:28,719 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:28,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6826 [2021-07-09 17:23:28,920 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-07-09 17:23:28,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:28,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903220793] [2021-07-09 17:23:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:29,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:29,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903220793] [2021-07-09 17:23:29,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903220793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:29,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775445711] [2021-07-09 17:23:29,096 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:29,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:29,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:29,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:29,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:29,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:23:29,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:29,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:29,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:30,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:30,091 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:23:30,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:30,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-09 17:23:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775445711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:30,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:30,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718012476] [2021-07-09 17:23:30,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:30,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:30,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:30,118 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:30,380 INFO L93 Difference]: Finished difference Result 227 states and 606 transitions. [2021-07-09 17:23:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:23:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:30,381 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:23:30,381 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:23:30,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:23:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:23:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-07-09 17:23:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-07-09 17:23:30,384 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-07-09 17:23:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:30,384 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-07-09 17:23:30,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-07-09 17:23:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:30,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:30,385 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:30,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6868 [2021-07-09 17:23:30,602 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-07-09 17:23:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:30,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286030263] [2021-07-09 17:23:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:30,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286030263] [2021-07-09 17:23:30,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286030263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365741452] [2021-07-09 17:23:30,636 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:30,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:30,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365741452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:30,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:23:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823130394] [2021-07-09 17:23:30,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:30,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:30,687 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:30,740 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2021-07-09 17:23:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:30,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-09 17:23:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:30,741 INFO L225 Difference]: With dead ends: 377 [2021-07-09 17:23:30,741 INFO L226 Difference]: Without dead ends: 377 [2021-07-09 17:23:30,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-09 17:23:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-07-09 17:23:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-07-09 17:23:30,745 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-07-09 17:23:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:30,745 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-07-09 17:23:30,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-07-09 17:23:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:30,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:30,745 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:30,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7043,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:30,962 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-07-09 17:23:30,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:30,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332719423] [2021-07-09 17:23:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332719423] [2021-07-09 17:23:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332719423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733202791] [2021-07-09 17:23:30,993 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:31,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:31,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733202791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:31,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:31,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187409239] [2021-07-09 17:23:31,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:31,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:31,051 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:31,144 INFO L93 Difference]: Finished difference Result 413 states and 931 transitions. [2021-07-09 17:23:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-09 17:23:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:31,145 INFO L225 Difference]: With dead ends: 413 [2021-07-09 17:23:31,145 INFO L226 Difference]: Without dead ends: 413 [2021-07-09 17:23:31,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-09 17:23:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-07-09 17:23:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-07-09 17:23:31,149 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-07-09 17:23:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:31,149 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-07-09 17:23:31,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-07-09 17:23:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:31,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:31,149 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:31,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7044,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:31,350 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-07-09 17:23:31,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:31,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715213840] [2021-07-09 17:23:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715213840] [2021-07-09 17:23:31,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715213840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508075980] [2021-07-09 17:23:31,501 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:31,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:31,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:31,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:31,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:31,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:31,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:31,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:31,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:31,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508075980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:31,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:31,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401475941] [2021-07-09 17:23:31,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:31,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:31,848 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:32,119 INFO L93 Difference]: Finished difference Result 211 states and 586 transitions. [2021-07-09 17:23:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:32,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:32,125 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:23:32,125 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:23:32,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:23:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:23:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-07-09 17:23:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-07-09 17:23:32,151 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-07-09 17:23:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:32,151 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-07-09 17:23:32,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-07-09 17:23:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:32,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:32,151 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:32,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7045 [2021-07-09 17:23:32,352 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:32,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-07-09 17:23:32,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:32,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950110297] [2021-07-09 17:23:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:32,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:32,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950110297] [2021-07-09 17:23:32,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950110297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:32,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388008357] [2021-07-09 17:23:32,517 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:32,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:32,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:32,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:32,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:32,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:23:33,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:23:33,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:33,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:33,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:33,512 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-07-09 17:23:33,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:33,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-09 17:23:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:33,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388008357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:33,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:33,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068029985] [2021-07-09 17:23:33,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:33,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:33,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:33,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:33,539 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:33,900 INFO L93 Difference]: Finished difference Result 244 states and 655 transitions. [2021-07-09 17:23:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:33,901 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:23:33,901 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:23:33,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:23:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:23:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-07-09 17:23:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-07-09 17:23:33,904 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-07-09 17:23:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:33,904 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-07-09 17:23:33,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-07-09 17:23:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:33,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:33,904 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:34,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7086 [2021-07-09 17:23:34,117 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-07-09 17:23:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:34,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506675323] [2021-07-09 17:23:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:34,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:34,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506675323] [2021-07-09 17:23:34,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506675323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135021201] [2021-07-09 17:23:34,154 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:34,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135021201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:34,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291544512] [2021-07-09 17:23:34,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:34,208 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:34,297 INFO L93 Difference]: Finished difference Result 427 states and 977 transitions. [2021-07-09 17:23:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-09 17:23:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:34,299 INFO L225 Difference]: With dead ends: 427 [2021-07-09 17:23:34,299 INFO L226 Difference]: Without dead ends: 427 [2021-07-09 17:23:34,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-09 17:23:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-07-09 17:23:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-07-09 17:23:34,302 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-07-09 17:23:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:34,302 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-07-09 17:23:34,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-07-09 17:23:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:34,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:34,303 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:34,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7259,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:34,519 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-07-09 17:23:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:34,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272929122] [2021-07-09 17:23:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:34,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:34,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272929122] [2021-07-09 17:23:34,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272929122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788273072] [2021-07-09 17:23:34,552 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:34,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788273072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:34,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821670011] [2021-07-09 17:23:34,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:34,605 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:34,729 INFO L93 Difference]: Finished difference Result 378 states and 905 transitions. [2021-07-09 17:23:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-09 17:23:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:34,730 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:23:34,730 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:23:34,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:23:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-07-09 17:23:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-07-09 17:23:34,734 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-07-09 17:23:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:34,734 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-07-09 17:23:34,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-07-09 17:23:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:34,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:34,734 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:34,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7260 [2021-07-09 17:23:34,935 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-07-09 17:23:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:34,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060785631] [2021-07-09 17:23:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:35,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:35,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060785631] [2021-07-09 17:23:35,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060785631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:35,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833925638] [2021-07-09 17:23:35,096 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:35,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:35,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:35,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:35,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:35,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:35,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:35,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:35,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:35,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833925638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:35,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:35,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:35,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518727416] [2021-07-09 17:23:35,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:35,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:35,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:35,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:35,578 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:35,804 INFO L93 Difference]: Finished difference Result 222 states and 624 transitions. [2021-07-09 17:23:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:23:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:35,805 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:23:35,805 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:23:35,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:23:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-07-09 17:23:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-07-09 17:23:35,808 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-07-09 17:23:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:35,808 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-07-09 17:23:35,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-07-09 17:23:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:35,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:35,808 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:36,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7261,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:36,025 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-07-09 17:23:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:36,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256195473] [2021-07-09 17:23:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:36,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:36,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256195473] [2021-07-09 17:23:36,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256195473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:36,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343463882] [2021-07-09 17:23:36,186 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:36,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:36,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:36,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:36,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:36,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:23:36,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:36,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:36,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:36,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:37,014 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:23:37,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:37,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-09 17:23:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:37,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343463882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:37,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:37,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:37,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117319779] [2021-07-09 17:23:37,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:37,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:37,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:37,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:37,041 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:37,385 INFO L93 Difference]: Finished difference Result 256 states and 697 transitions. [2021-07-09 17:23:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:23:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:37,386 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:23:37,386 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:23:37,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:23:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:23:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-07-09 17:23:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-07-09 17:23:37,389 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-07-09 17:23:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:37,389 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-07-09 17:23:37,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-07-09 17:23:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:37,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:37,389 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:37,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7335 [2021-07-09 17:23:37,597 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-07-09 17:23:37,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:37,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994467578] [2021-07-09 17:23:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:37,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:37,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994467578] [2021-07-09 17:23:37,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994467578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:37,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274714304] [2021-07-09 17:23:37,627 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:37,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:37,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:37,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274714304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:37,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:37,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:23:37,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772721934] [2021-07-09 17:23:37,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:23:37,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:37,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:23:37,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:23:37,675 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:37,707 INFO L93 Difference]: Finished difference Result 345 states and 847 transitions. [2021-07-09 17:23:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:37,708 INFO L225 Difference]: With dead ends: 345 [2021-07-09 17:23:37,708 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 17:23:37,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 17:23:37,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-07-09 17:23:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 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) [2021-07-09 17:23:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-07-09 17:23:37,711 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-07-09 17:23:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:37,712 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-07-09 17:23:37,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-07-09 17:23:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:37,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:37,712 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:37,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7492 [2021-07-09 17:23:37,928 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-07-09 17:23:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:37,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731257001] [2021-07-09 17:23:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:37,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:37,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731257001] [2021-07-09 17:23:37,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731257001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:37,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441910548] [2021-07-09 17:23:37,959 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:38,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:38,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441910548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:38,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:23:38,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984472137] [2021-07-09 17:23:38,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:38,033 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:38,086 INFO L93 Difference]: Finished difference Result 369 states and 882 transitions. [2021-07-09 17:23:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:23:38,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-09 17:23:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:38,087 INFO L225 Difference]: With dead ends: 369 [2021-07-09 17:23:38,087 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:23:38,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:23:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-07-09 17:23:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-07-09 17:23:38,090 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-07-09 17:23:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:38,090 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-07-09 17:23:38,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:23:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-07-09 17:23:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:38,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:38,091 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:38,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7493 [2021-07-09 17:23:38,307 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-07-09 17:23:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:38,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328519031] [2021-07-09 17:23:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:38,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328519031] [2021-07-09 17:23:38,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328519031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140862807] [2021-07-09 17:23:38,337 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:38,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140862807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:38,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:38,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830435752] [2021-07-09 17:23:38,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:38,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:38,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:38,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:38,413 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:38,508 INFO L93 Difference]: Finished difference Result 388 states and 893 transitions. [2021-07-09 17:23:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:23:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-09 17:23:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:38,509 INFO L225 Difference]: With dead ends: 388 [2021-07-09 17:23:38,509 INFO L226 Difference]: Without dead ends: 388 [2021-07-09 17:23:38,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-09 17:23:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-07-09 17:23:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-07-09 17:23:38,513 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-07-09 17:23:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:38,513 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-07-09 17:23:38,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-07-09 17:23:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:38,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:38,513 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:38,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7494,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,729 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:38,729 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-07-09 17:23:38,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:38,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231691301] [2021-07-09 17:23:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:38,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231691301] [2021-07-09 17:23:38,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231691301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093853108] [2021-07-09 17:23:38,761 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:38,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093853108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:38,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:38,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522352388] [2021-07-09 17:23:38,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:38,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:38,875 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:39,001 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2021-07-09 17:23:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:23:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-09 17:23:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:39,002 INFO L225 Difference]: With dead ends: 319 [2021-07-09 17:23:39,002 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 17:23:39,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 17:23:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-07-09 17:23:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-07-09 17:23:39,005 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-07-09 17:23:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:39,005 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-07-09 17:23:39,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-07-09 17:23:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:39,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:39,006 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:39,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7495 [2021-07-09 17:23:39,221 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-07-09 17:23:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:39,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818376770] [2021-07-09 17:23:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:39,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:39,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818376770] [2021-07-09 17:23:39,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818376770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:39,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358124726] [2021-07-09 17:23:39,256 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:39,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:39,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:39,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:39,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358124726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:39,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:39,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:39,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599552319] [2021-07-09 17:23:39,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:39,310 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:39,453 INFO L93 Difference]: Finished difference Result 345 states and 840 transitions. [2021-07-09 17:23:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:23:39,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-09 17:23:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:39,454 INFO L225 Difference]: With dead ends: 345 [2021-07-09 17:23:39,454 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 17:23:39,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 17:23:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-07-09 17:23:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-07-09 17:23:39,457 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-07-09 17:23:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:39,457 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-07-09 17:23:39,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-09 17:23:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-07-09 17:23:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:39,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:39,458 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:39,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7496,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:39,674 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:39,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:39,674 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-07-09 17:23:39,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:39,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274247839] [2021-07-09 17:23:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:39,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:39,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274247839] [2021-07-09 17:23:39,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274247839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:39,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486733671] [2021-07-09 17:23:39,830 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:39,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:39,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:40,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:40,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:40,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:40,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:40,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:40,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486733671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:40,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:40,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:40,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281800836] [2021-07-09 17:23:40,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:40,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:40,230 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:40,518 INFO L93 Difference]: Finished difference Result 234 states and 664 transitions. [2021-07-09 17:23:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:40,519 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:23:40,519 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:23:40,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:23:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-07-09 17:23:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-07-09 17:23:40,522 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-07-09 17:23:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:40,522 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-07-09 17:23:40,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-07-09 17:23:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:40,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:40,522 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:40,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7497 [2021-07-09 17:23:40,723 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:40,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:40,723 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-07-09 17:23:40,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:40,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285344527] [2021-07-09 17:23:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:40,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285344527] [2021-07-09 17:23:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285344527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689293034] [2021-07-09 17:23:40,885 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:40,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:40,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:40,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:40,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:41,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:41,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:23:41,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:41,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:41,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:41,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:41,999 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:23:42,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:42,000 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-09 17:23:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:42,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689293034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:42,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:42,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:42,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286713368] [2021-07-09 17:23:42,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:42,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:42,026 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:42,404 INFO L93 Difference]: Finished difference Result 272 states and 753 transitions. [2021-07-09 17:23:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:23:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:42,405 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:23:42,405 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:23:42,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:23:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-07-09 17:23:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-07-09 17:23:42,408 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-07-09 17:23:42,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:42,408 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-07-09 17:23:42,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-07-09 17:23:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:42,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:42,409 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:42,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7561,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:42,621 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-07-09 17:23:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:42,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144493640] [2021-07-09 17:23:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:42,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144493640] [2021-07-09 17:23:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144493640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517527171] [2021-07-09 17:23:42,767 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:42,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:42,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:42,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:23:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:43,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:43,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:23:43,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:23:43,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:43,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:43,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:43,787 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:23:43,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:43,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-09 17:23:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:43,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517527171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:43,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:43,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:43,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342202353] [2021-07-09 17:23:43,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:43,814 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:44,605 INFO L93 Difference]: Finished difference Result 304 states and 812 transitions. [2021-07-09 17:23:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:23:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:44,606 INFO L225 Difference]: With dead ends: 304 [2021-07-09 17:23:44,606 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:23:44,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:23:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:23:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-07-09 17:23:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-07-09 17:23:44,609 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-07-09 17:23:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:44,609 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-07-09 17:23:44,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-07-09 17:23:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:44,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:44,609 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:44,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7744,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:44,825 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-07-09 17:23:44,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:44,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155928066] [2021-07-09 17:23:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:44,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:44,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155928066] [2021-07-09 17:23:44,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155928066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990796918] [2021-07-09 17:23:44,865 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:44,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:44,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990796918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:44,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:23:44,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833062777] [2021-07-09 17:23:44,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:44,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:44,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:44,980 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:45,027 INFO L93 Difference]: Finished difference Result 364 states and 870 transitions. [2021-07-09 17:23:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:23:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:45,028 INFO L225 Difference]: With dead ends: 364 [2021-07-09 17:23:45,028 INFO L226 Difference]: Without dead ends: 364 [2021-07-09 17:23:45,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:23:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-09 17:23:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-07-09 17:23:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-07-09 17:23:45,031 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-07-09 17:23:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:45,031 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-07-09 17:23:45,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-07-09 17:23:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:45,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:45,032 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:45,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7944,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,248 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:45,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-07-09 17:23:45,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:45,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199863177] [2021-07-09 17:23:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:45,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:45,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199863177] [2021-07-09 17:23:45,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199863177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167186314] [2021-07-09 17:23:45,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:45,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:45,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167186314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:45,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:23:45,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062649503] [2021-07-09 17:23:45,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:45,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:45,418 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:45,466 INFO L93 Difference]: Finished difference Result 346 states and 892 transitions. [2021-07-09 17:23:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:45,467 INFO L225 Difference]: With dead ends: 346 [2021-07-09 17:23:45,467 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:23:45,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:23:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:23:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-07-09 17:23:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-07-09 17:23:45,471 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-07-09 17:23:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:45,471 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-07-09 17:23:45,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-07-09 17:23:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:45,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:45,471 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:45,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7945,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,688 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-07-09 17:23:45,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:45,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792313113] [2021-07-09 17:23:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:45,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:45,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792313113] [2021-07-09 17:23:45,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792313113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97063391] [2021-07-09 17:23:45,723 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:23:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97063391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:45,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:45,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088493381] [2021-07-09 17:23:45,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:45,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:45,844 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:45,927 INFO L93 Difference]: Finished difference Result 372 states and 930 transitions. [2021-07-09 17:23:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:45,928 INFO L225 Difference]: With dead ends: 372 [2021-07-09 17:23:45,928 INFO L226 Difference]: Without dead ends: 372 [2021-07-09 17:23:45,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:23:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-09 17:23:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-07-09 17:23:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-07-09 17:23:45,931 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-07-09 17:23:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:45,931 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-07-09 17:23:45,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-07-09 17:23:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:45,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:45,932 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:46,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7946,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:46,148 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-07-09 17:23:46,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:46,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089099439] [2021-07-09 17:23:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:46,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:46,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089099439] [2021-07-09 17:23:46,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089099439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051911458] [2021-07-09 17:23:46,182 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 [2021-07-09 17:23:46,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:46,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:46,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:46,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:46,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051911458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:46,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:46,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335217091] [2021-07-09 17:23:46,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:46,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:46,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:46,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:46,237 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:46,345 INFO L93 Difference]: Finished difference Result 335 states and 866 transitions. [2021-07-09 17:23:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:46,346 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:23:46,346 INFO L226 Difference]: Without dead ends: 335 [2021-07-09 17:23:46,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:23:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-09 17:23:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-07-09 17:23:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-07-09 17:23:46,350 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-07-09 17:23:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:46,350 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-07-09 17:23:46,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-07-09 17:23:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:46,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:46,350 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:46,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7947,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:46,566 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-07-09 17:23:46,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:46,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487278781] [2021-07-09 17:23:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:46,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:46,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487278781] [2021-07-09 17:23:46,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487278781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434660293] [2021-07-09 17:23:46,603 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 [2021-07-09 17:23:46,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:46,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434660293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:46,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538237805] [2021-07-09 17:23:46,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:46,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:46,673 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:46,801 INFO L93 Difference]: Finished difference Result 346 states and 896 transitions. [2021-07-09 17:23:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:46,802 INFO L225 Difference]: With dead ends: 346 [2021-07-09 17:23:46,802 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:23:46,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:23:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-07-09 17:23:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-07-09 17:23:46,806 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-07-09 17:23:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:46,806 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-07-09 17:23:46,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-07-09 17:23:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:23:46,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:46,806 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:47,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7948,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:47,022 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:47,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:47,022 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-07-09 17:23:47,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:47,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957343339] [2021-07-09 17:23:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:47,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:47,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957343339] [2021-07-09 17:23:47,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957343339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:47,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12886563] [2021-07-09 17:23:47,059 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 [2021-07-09 17:23:47,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:23:47,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12886563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:47,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:47,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395625753] [2021-07-09 17:23:47,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:47,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:47,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:47,113 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:47,234 INFO L93 Difference]: Finished difference Result 385 states and 1019 transitions. [2021-07-09 17:23:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:23:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:47,235 INFO L225 Difference]: With dead ends: 385 [2021-07-09 17:23:47,236 INFO L226 Difference]: Without dead ends: 385 [2021-07-09 17:23:47,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-09 17:23:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-07-09 17:23:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-07-09 17:23:47,239 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-07-09 17:23:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:47,239 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-07-09 17:23:47,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-07-09 17:23:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:47,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:47,239 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:47,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7949 [2021-07-09 17:23:47,456 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-07-09 17:23:47,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:47,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635264100] [2021-07-09 17:23:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:47,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:47,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635264100] [2021-07-09 17:23:47,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635264100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:47,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815832588] [2021-07-09 17:23:47,532 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:23:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:47,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:48,645 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-07-09 17:23:48,753 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-07-09 17:23:48,859 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-07-09 17:23:48,979 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 221 [2021-07-09 17:23:49,147 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 232 [2021-07-09 17:23:49,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:49,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:49,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:49,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:49,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815832588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:49,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:49,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:49,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473961001] [2021-07-09 17:23:49,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:49,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:49,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:49,402 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:49,707 INFO L93 Difference]: Finished difference Result 306 states and 891 transitions. [2021-07-09 17:23:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-09 17:23:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:49,708 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:23:49,708 INFO L226 Difference]: Without dead ends: 301 [2021-07-09 17:23:49,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-09 17:23:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-07-09 17:23:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-07-09 17:23:49,711 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-07-09 17:23:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:49,711 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-07-09 17:23:49,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-07-09 17:23:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:49,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:49,712 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:49,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7950 [2021-07-09 17:23:49,914 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:49,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-07-09 17:23:49,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:49,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018000778] [2021-07-09 17:23:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:50,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:50,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018000778] [2021-07-09 17:23:50,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018000778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:50,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98058464] [2021-07-09 17:23:50,032 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:50,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:50,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:23:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:50,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:50,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:50,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:50,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:50,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:50,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98058464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:50,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:50,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:50,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597125995] [2021-07-09 17:23:50,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:50,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:50,911 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:51,609 INFO L93 Difference]: Finished difference Result 402 states and 1031 transitions. [2021-07-09 17:23:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:23:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:51,610 INFO L225 Difference]: With dead ends: 402 [2021-07-09 17:23:51,610 INFO L226 Difference]: Without dead ends: 392 [2021-07-09 17:23:51,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:23:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-09 17:23:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-07-09 17:23:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-07-09 17:23:51,614 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-07-09 17:23:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:51,614 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-07-09 17:23:51,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-07-09 17:23:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:51,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:51,615 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:51,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-07-09 17:23:51,825 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:51,825 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-07-09 17:23:51,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:51,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033204575] [2021-07-09 17:23:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:51,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:51,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033204575] [2021-07-09 17:23:51,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033204575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:51,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091939681] [2021-07-09 17:23:51,864 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:51,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:23:51,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:51,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091939681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:51,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:51,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:51,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660883608] [2021-07-09 17:23:51,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:51,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:51,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:51,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:51,944 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:51,999 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-07-09 17:23:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:52,000 INFO L225 Difference]: With dead ends: 460 [2021-07-09 17:23:52,000 INFO L226 Difference]: Without dead ends: 460 [2021-07-09 17:23:52,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:23:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-07-09 17:23:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-07-09 17:23:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-07-09 17:23:52,004 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-07-09 17:23:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:52,004 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-07-09 17:23:52,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-07-09 17:23:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:52,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:52,004 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:52,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8259 [2021-07-09 17:23:52,220 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-07-09 17:23:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:52,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366537012] [2021-07-09 17:23:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:52,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:52,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366537012] [2021-07-09 17:23:52,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366537012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:52,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522529379] [2021-07-09 17:23:52,255 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:52,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:52,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:52,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:23:52,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:52,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522529379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:52,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:52,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:23:52,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481187183] [2021-07-09 17:23:52,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:52,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:52,310 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:52,380 INFO L93 Difference]: Finished difference Result 492 states and 1194 transitions. [2021-07-09 17:23:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:23:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:52,381 INFO L225 Difference]: With dead ends: 492 [2021-07-09 17:23:52,381 INFO L226 Difference]: Without dead ends: 492 [2021-07-09 17:23:52,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:23:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-09 17:23:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-07-09 17:23:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-07-09 17:23:52,385 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-07-09 17:23:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:52,385 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-07-09 17:23:52,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-07-09 17:23:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:52,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:52,386 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:52,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8260 [2021-07-09 17:23:52,586 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:52,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-07-09 17:23:52,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:52,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407642605] [2021-07-09 17:23:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:52,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:52,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407642605] [2021-07-09 17:23:52,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407642605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:52,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775964581] [2021-07-09 17:23:52,690 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 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 [2021-07-09 17:23:52,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:52,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:52,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:23:52,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:52,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:53,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:53,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:53,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:53,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:53,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775964581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:53,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:53,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454541698] [2021-07-09 17:23:53,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:53,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:53,321 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:53,499 INFO L93 Difference]: Finished difference Result 323 states and 904 transitions. [2021-07-09 17:23:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:23:53,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-09 17:23:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:53,500 INFO L225 Difference]: With dead ends: 323 [2021-07-09 17:23:53,500 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 17:23:53,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:53,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 17:23:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-07-09 17:23:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-07-09 17:23:53,521 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-07-09 17:23:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:53,522 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-07-09 17:23:53,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-07-09 17:23:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:53,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:53,522 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:53,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8261,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:53,739 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-07-09 17:23:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:53,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778353278] [2021-07-09 17:23:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:53,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778353278] [2021-07-09 17:23:53,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778353278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536302064] [2021-07-09 17:23:53,823 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:53,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:23:53,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:53,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:23:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:54,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:54,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:54,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:54,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:54,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:54,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:54,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536302064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:54,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:54,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:54,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379762494] [2021-07-09 17:23:54,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:54,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:54,661 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:55,024 INFO L93 Difference]: Finished difference Result 333 states and 930 transitions. [2021-07-09 17:23:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:23:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:55,025 INFO L225 Difference]: With dead ends: 333 [2021-07-09 17:23:55,025 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 17:23:55,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:23:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 17:23:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-07-09 17:23:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-07-09 17:23:55,029 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-07-09 17:23:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:55,029 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-07-09 17:23:55,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-07-09 17:23:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:55,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:55,029 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:55,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8358 [2021-07-09 17:23:55,245 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-07-09 17:23:55,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:55,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745610557] [2021-07-09 17:23:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:55,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:55,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745610557] [2021-07-09 17:23:55,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745610557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:55,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055982773] [2021-07-09 17:23:55,332 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:23:55,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:55,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:55,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:56,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:56,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:56,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:56,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:56,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055982773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:56,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:56,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:56,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028698015] [2021-07-09 17:23:56,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:56,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:56,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:56,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:56,624 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:57,039 INFO L93 Difference]: Finished difference Result 351 states and 960 transitions. [2021-07-09 17:23:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:23:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:57,040 INFO L225 Difference]: With dead ends: 351 [2021-07-09 17:23:57,040 INFO L226 Difference]: Without dead ends: 338 [2021-07-09 17:23:57,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-09 17:23:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-07-09 17:23:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-07-09 17:23:57,044 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-07-09 17:23:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:57,044 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-07-09 17:23:57,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-07-09 17:23:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:57,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:57,044 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:57,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8465 [2021-07-09 17:23:57,261 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:57,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-07-09 17:23:57,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:57,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344015965] [2021-07-09 17:23:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344015965] [2021-07-09 17:23:57,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344015965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519609002] [2021-07-09 17:23:57,295 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:57,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:57,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:23:57,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519609002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:57,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:23:57,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801741236] [2021-07-09 17:23:57,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:57,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:57,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:57,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:57,350 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:57,443 INFO L93 Difference]: Finished difference Result 527 states and 1263 transitions. [2021-07-09 17:23:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:57,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:57,444 INFO L225 Difference]: With dead ends: 527 [2021-07-09 17:23:57,444 INFO L226 Difference]: Without dead ends: 527 [2021-07-09 17:23:57,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-09 17:23:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-07-09 17:23:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-07-09 17:23:57,449 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-07-09 17:23:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:57,449 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-07-09 17:23:57,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-07-09 17:23:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:57,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:57,449 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:57,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8636,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:57,650 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-07-09 17:23:57,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:57,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065350192] [2021-07-09 17:23:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:57,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065350192] [2021-07-09 17:23:57,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065350192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134749348] [2021-07-09 17:23:57,751 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:57,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:23:57,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:23:57,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:58,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:58,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:58,610 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 284 [2021-07-09 17:23:59,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:59,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:59,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:59,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134749348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:59,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:59,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:23:59,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264845615] [2021-07-09 17:23:59,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:23:59,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:59,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:23:59,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:59,454 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:59,695 INFO L93 Difference]: Finished difference Result 307 states and 875 transitions. [2021-07-09 17:23:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:23:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-09 17:23:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:59,696 INFO L225 Difference]: With dead ends: 307 [2021-07-09 17:23:59,696 INFO L226 Difference]: Without dead ends: 302 [2021-07-09 17:23:59,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-09 17:23:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-07-09 17:23:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-07-09 17:23:59,699 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-07-09 17:23:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:59,699 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-07-09 17:23:59,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-07-09 17:23:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:59,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:59,700 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:59,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8637 [2021-07-09 17:23:59,916 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-07-09 17:23:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:59,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844823469] [2021-07-09 17:23:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844823469] [2021-07-09 17:23:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844823469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783821160] [2021-07-09 17:23:59,946 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:59,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:59,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:59,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:23:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:00,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783821160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:00,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:00,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:00,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773074940] [2021-07-09 17:24:00,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:00,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:00,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:00,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:00,000 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:00,055 INFO L93 Difference]: Finished difference Result 474 states and 1151 transitions. [2021-07-09 17:24:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:00,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-09 17:24:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:00,056 INFO L225 Difference]: With dead ends: 474 [2021-07-09 17:24:00,056 INFO L226 Difference]: Without dead ends: 474 [2021-07-09 17:24:00,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-09 17:24:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-07-09 17:24:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-07-09 17:24:00,060 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-07-09 17:24:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:00,060 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-07-09 17:24:00,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-07-09 17:24:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:00,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:00,060 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:00,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8817,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:00,277 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-07-09 17:24:00,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:00,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144917011] [2021-07-09 17:24:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:00,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:00,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144917011] [2021-07-09 17:24:00,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144917011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:00,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369552249] [2021-07-09 17:24:00,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:00,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:00,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:00,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:00,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:00,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:01,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:01,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:01,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:01,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:01,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369552249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:01,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635905124] [2021-07-09 17:24:01,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:01,109 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:01,400 INFO L93 Difference]: Finished difference Result 373 states and 1019 transitions. [2021-07-09 17:24:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:24:01,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:01,401 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:24:01,402 INFO L226 Difference]: Without dead ends: 356 [2021-07-09 17:24:01,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-09 17:24:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-07-09 17:24:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-07-09 17:24:01,405 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-07-09 17:24:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:01,405 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-07-09 17:24:01,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-07-09 17:24:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:01,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:01,406 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:01,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8818,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:01,621 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-07-09 17:24:01,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:01,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172624225] [2021-07-09 17:24:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:01,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:01,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172624225] [2021-07-09 17:24:01,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172624225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924632100] [2021-07-09 17:24:01,674 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:01,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:01,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:01,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:01,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:01,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924632100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:01,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:01,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026495578] [2021-07-09 17:24:01,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:01,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:01,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:01,774 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:01,860 INFO L93 Difference]: Finished difference Result 514 states and 1221 transitions. [2021-07-09 17:24:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:24:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:01,873 INFO L225 Difference]: With dead ends: 514 [2021-07-09 17:24:01,873 INFO L226 Difference]: Without dead ends: 514 [2021-07-09 17:24:01,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-09 17:24:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-07-09 17:24:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-07-09 17:24:01,878 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-07-09 17:24:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:01,878 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-07-09 17:24:01,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-07-09 17:24:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:01,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:01,878 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:02,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8931,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:02,079 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:02,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:02,079 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-07-09 17:24:02,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:02,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717296456] [2021-07-09 17:24:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:02,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717296456] [2021-07-09 17:24:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717296456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541781696] [2021-07-09 17:24:02,117 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541781696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:02,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:02,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136755102] [2021-07-09 17:24:02,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:02,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:02,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:02,174 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:02,314 INFO L93 Difference]: Finished difference Result 554 states and 1291 transitions. [2021-07-09 17:24:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:02,314 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:02,315 INFO L225 Difference]: With dead ends: 554 [2021-07-09 17:24:02,315 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:24:02,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:24:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-07-09 17:24:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-07-09 17:24:02,320 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-07-09 17:24:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:02,320 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-07-09 17:24:02,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-07-09 17:24:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:02,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:02,321 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:02,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8932,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:02,538 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-07-09 17:24:02,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:02,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765330350] [2021-07-09 17:24:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:02,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765330350] [2021-07-09 17:24:02,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765330350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366743864] [2021-07-09 17:24:02,638 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:02,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:02,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:02,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:02,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:02,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:03,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:03,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:03,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:03,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:03,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366743864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:03,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:03,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394789149] [2021-07-09 17:24:03,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:03,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:03,303 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:03,471 INFO L93 Difference]: Finished difference Result 301 states and 868 transitions. [2021-07-09 17:24:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:03,472 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-09 17:24:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:03,472 INFO L225 Difference]: With dead ends: 301 [2021-07-09 17:24:03,472 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 17:24:03,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 17:24:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-07-09 17:24:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-07-09 17:24:03,476 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-07-09 17:24:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:03,476 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-07-09 17:24:03,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-07-09 17:24:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:03,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:03,476 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:03,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:03,677 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-07-09 17:24:03,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:03,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416819389] [2021-07-09 17:24:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:03,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416819389] [2021-07-09 17:24:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416819389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731545727] [2021-07-09 17:24:03,705 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:03,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:03,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:03,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:03,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:24:03,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731545727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:03,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:24:03,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628764649] [2021-07-09 17:24:03,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:03,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:03,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:03,757 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:03,791 INFO L93 Difference]: Finished difference Result 435 states and 1110 transitions. [2021-07-09 17:24:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:24:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:03,792 INFO L225 Difference]: With dead ends: 435 [2021-07-09 17:24:03,792 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 17:24:03,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 17:24:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-07-09 17:24:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-07-09 17:24:03,796 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-07-09 17:24:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:03,796 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-07-09 17:24:03,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-07-09 17:24:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:03,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:03,797 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:04,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9072,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:04,013 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-07-09 17:24:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:04,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676522524] [2021-07-09 17:24:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:04,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676522524] [2021-07-09 17:24:04,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676522524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409722789] [2021-07-09 17:24:04,046 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:04,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:04,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:04,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:04,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409722789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:04,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:04,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141222048] [2021-07-09 17:24:04,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:04,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:04,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:04,097 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:04,148 INFO L93 Difference]: Finished difference Result 471 states and 1163 transitions. [2021-07-09 17:24:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:24:04,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-09 17:24:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:04,149 INFO L225 Difference]: With dead ends: 471 [2021-07-09 17:24:04,149 INFO L226 Difference]: Without dead ends: 471 [2021-07-09 17:24:04,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-09 17:24:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-07-09 17:24:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-07-09 17:24:04,154 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-07-09 17:24:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:04,155 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-07-09 17:24:04,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-07-09 17:24:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:04,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:04,155 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:04,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9073 [2021-07-09 17:24:04,372 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-07-09 17:24:04,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:04,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351928190] [2021-07-09 17:24:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:04,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351928190] [2021-07-09 17:24:04,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351928190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501674234] [2021-07-09 17:24:04,450 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:04,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:04,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:04,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:04,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:05,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:05,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:05,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:05,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:05,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501674234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:05,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:05,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:05,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578863770] [2021-07-09 17:24:05,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:05,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:05,139 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:05,455 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-07-09 17:24:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:05,457 INFO L225 Difference]: With dead ends: 383 [2021-07-09 17:24:05,457 INFO L226 Difference]: Without dead ends: 366 [2021-07-09 17:24:05,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-09 17:24:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-07-09 17:24:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-07-09 17:24:05,461 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-07-09 17:24:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:05,461 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-07-09 17:24:05,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-07-09 17:24:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:05,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:05,461 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:05,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9074,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:05,678 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:05,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-07-09 17:24:05,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:05,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279199992] [2021-07-09 17:24:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:05,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:05,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279199992] [2021-07-09 17:24:05,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279199992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:05,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533719287] [2021-07-09 17:24:05,714 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:05,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:05,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:05,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:05,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:05,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533719287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:05,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:05,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57150419] [2021-07-09 17:24:05,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:05,767 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:05,854 INFO L93 Difference]: Finished difference Result 503 states and 1214 transitions. [2021-07-09 17:24:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:05,856 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:24:05,856 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:24:05,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:24:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-07-09 17:24:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-07-09 17:24:05,860 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-07-09 17:24:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:05,860 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-07-09 17:24:05,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-07-09 17:24:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:05,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:05,861 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:06,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9205 [2021-07-09 17:24:06,078 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:06,078 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-07-09 17:24:06,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:06,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009790415] [2021-07-09 17:24:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009790415] [2021-07-09 17:24:06,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009790415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124379429] [2021-07-09 17:24:06,114 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:06,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124379429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:06,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:06,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927232550] [2021-07-09 17:24:06,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:06,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:06,171 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:06,320 INFO L93 Difference]: Finished difference Result 546 states and 1298 transitions. [2021-07-09 17:24:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:06,322 INFO L225 Difference]: With dead ends: 546 [2021-07-09 17:24:06,322 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 17:24:06,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 17:24:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-07-09 17:24:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-07-09 17:24:06,326 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-07-09 17:24:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:06,326 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-07-09 17:24:06,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-07-09 17:24:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:06,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:06,327 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:06,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9206,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:06,543 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-07-09 17:24:06,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:06,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540049979] [2021-07-09 17:24:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:06,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540049979] [2021-07-09 17:24:06,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540049979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089122106] [2021-07-09 17:24:06,581 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:06,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:06,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:06,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:06,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089122106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:06,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:06,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642940427] [2021-07-09 17:24:06,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:06,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:06,637 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:06,839 INFO L93 Difference]: Finished difference Result 544 states and 1360 transitions. [2021-07-09 17:24:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:06,840 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:24:06,840 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:24:06,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:24:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-07-09 17:24:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-07-09 17:24:06,845 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-07-09 17:24:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:06,845 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-07-09 17:24:06,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-07-09 17:24:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:06,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:06,845 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:07,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9207,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:07,062 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-07-09 17:24:07,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:07,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327054538] [2021-07-09 17:24:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:07,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327054538] [2021-07-09 17:24:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327054538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053334031] [2021-07-09 17:24:07,155 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 [2021-07-09 17:24:07,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:07,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:24:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:07,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:07,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:07,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:07,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:07,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:07,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:07,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053334031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:07,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:07,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:07,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493033250] [2021-07-09 17:24:07,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:07,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:07,853 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:08,096 INFO L93 Difference]: Finished difference Result 365 states and 1058 transitions. [2021-07-09 17:24:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-09 17:24:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:08,097 INFO L225 Difference]: With dead ends: 365 [2021-07-09 17:24:08,097 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 17:24:08,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 17:24:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-07-09 17:24:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-07-09 17:24:08,102 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-07-09 17:24:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:08,102 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-07-09 17:24:08,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-07-09 17:24:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:08,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:08,102 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:08,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9208,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:08,319 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-07-09 17:24:08,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:08,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037082028] [2021-07-09 17:24:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:08,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037082028] [2021-07-09 17:24:08,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037082028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885608936] [2021-07-09 17:24:08,410 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 [2021-07-09 17:24:08,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:08,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:08,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:09,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:09,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:09,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:09,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:09,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885608936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:09,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:09,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654433249] [2021-07-09 17:24:09,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:09,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:09,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:09,625 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:10,004 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-07-09 17:24:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:24:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:10,005 INFO L225 Difference]: With dead ends: 375 [2021-07-09 17:24:10,005 INFO L226 Difference]: Without dead ends: 370 [2021-07-09 17:24:10,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-09 17:24:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-07-09 17:24:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-07-09 17:24:10,009 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-07-09 17:24:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:10,009 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-07-09 17:24:10,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-07-09 17:24:10,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:10,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:10,010 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:10,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9304 [2021-07-09 17:24:10,224 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:10,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-07-09 17:24:10,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:10,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863647075] [2021-07-09 17:24:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:10,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:10,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863647075] [2021-07-09 17:24:10,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863647075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:10,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701907601] [2021-07-09 17:24:10,261 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 [2021-07-09 17:24:10,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:10,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:10,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701907601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:10,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:10,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:10,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521706161] [2021-07-09 17:24:10,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:10,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:10,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:10,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:10,312 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:10,359 INFO L93 Difference]: Finished difference Result 498 states and 1262 transitions. [2021-07-09 17:24:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:24:10,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-09 17:24:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:10,360 INFO L225 Difference]: With dead ends: 498 [2021-07-09 17:24:10,360 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:24:10,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:24:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-07-09 17:24:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-07-09 17:24:10,364 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-07-09 17:24:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:10,364 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-07-09 17:24:10,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-07-09 17:24:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:10,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:10,365 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:10,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9489 [2021-07-09 17:24:10,581 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:10,582 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-07-09 17:24:10,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:10,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58542020] [2021-07-09 17:24:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:10,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:10,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58542020] [2021-07-09 17:24:10,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58542020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:10,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237944134] [2021-07-09 17:24:10,614 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 [2021-07-09 17:24:10,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:10,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:10,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:10,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237944134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:10,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:10,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234655595] [2021-07-09 17:24:10,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:10,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:10,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:10,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:10,666 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:10,708 INFO L93 Difference]: Finished difference Result 440 states and 1150 transitions. [2021-07-09 17:24:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:24:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-09 17:24:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:10,709 INFO L225 Difference]: With dead ends: 440 [2021-07-09 17:24:10,709 INFO L226 Difference]: Without dead ends: 440 [2021-07-09 17:24:10,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-07-09 17:24:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-07-09 17:24:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-07-09 17:24:10,713 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-07-09 17:24:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:10,713 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-07-09 17:24:10,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-07-09 17:24:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:10,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:10,714 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:10,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9490,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:10,929 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-07-09 17:24:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:10,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170139555] [2021-07-09 17:24:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:10,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:10,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170139555] [2021-07-09 17:24:10,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170139555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:10,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730338816] [2021-07-09 17:24:10,998 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 [2021-07-09 17:24:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:11,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:11,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:11,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:11,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:11,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:11,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:11,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730338816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:11,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:11,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904892269] [2021-07-09 17:24:11,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:11,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:11,979 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:12,276 INFO L93 Difference]: Finished difference Result 386 states and 1061 transitions. [2021-07-09 17:24:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:12,277 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:12,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:12,278 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:24:12,278 INFO L226 Difference]: Without dead ends: 373 [2021-07-09 17:24:12,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-09 17:24:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-07-09 17:24:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-07-09 17:24:12,282 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-07-09 17:24:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:12,282 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-07-09 17:24:12,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-07-09 17:24:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:12,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:12,282 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:12,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9491,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:12,499 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-07-09 17:24:12,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:12,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624075327] [2021-07-09 17:24:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:12,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624075327] [2021-07-09 17:24:12,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624075327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583639480] [2021-07-09 17:24:12,535 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:12,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:12,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:12,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583639480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:12,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:12,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70112838] [2021-07-09 17:24:12,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:12,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:12,586 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:12,658 INFO L93 Difference]: Finished difference Result 472 states and 1196 transitions. [2021-07-09 17:24:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:12,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:12,659 INFO L225 Difference]: With dead ends: 472 [2021-07-09 17:24:12,659 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:24:12,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:24:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-07-09 17:24:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-07-09 17:24:12,663 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-07-09 17:24:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:12,663 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-07-09 17:24:12,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-07-09 17:24:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:12,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:12,664 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:12,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9650 [2021-07-09 17:24:12,877 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-07-09 17:24:12,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:12,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441589630] [2021-07-09 17:24:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:12,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441589630] [2021-07-09 17:24:12,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441589630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969222759] [2021-07-09 17:24:12,913 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) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:12,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:12,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:12,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:12,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969222759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:12,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:12,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149985697] [2021-07-09 17:24:12,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:12,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:12,972 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:13,102 INFO L93 Difference]: Finished difference Result 490 states and 1202 transitions. [2021-07-09 17:24:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:24:13,103 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:13,104 INFO L225 Difference]: With dead ends: 490 [2021-07-09 17:24:13,104 INFO L226 Difference]: Without dead ends: 490 [2021-07-09 17:24:13,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-09 17:24:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-07-09 17:24:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-07-09 17:24:13,108 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-07-09 17:24:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:13,108 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-07-09 17:24:13,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-07-09 17:24:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:13,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:13,108 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:13,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9651,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:13,325 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:13,325 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-07-09 17:24:13,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:13,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650952794] [2021-07-09 17:24:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650952794] [2021-07-09 17:24:13,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650952794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025144616] [2021-07-09 17:24:13,373 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 [2021-07-09 17:24:13,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:13,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:13,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025144616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:13,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:13,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889856954] [2021-07-09 17:24:13,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:13,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:13,435 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:13,570 INFO L93 Difference]: Finished difference Result 433 states and 1094 transitions. [2021-07-09 17:24:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:13,597 INFO L225 Difference]: With dead ends: 433 [2021-07-09 17:24:13,598 INFO L226 Difference]: Without dead ends: 433 [2021-07-09 17:24:13,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-09 17:24:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-07-09 17:24:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-09 17:24:13,601 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-07-09 17:24:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:13,602 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-09 17:24:13,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-09 17:24:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:13,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:13,602 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:13,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9652 [2021-07-09 17:24:13,809 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-07-09 17:24:13,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:13,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663872803] [2021-07-09 17:24:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663872803] [2021-07-09 17:24:13,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663872803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197979436] [2021-07-09 17:24:13,854 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 [2021-07-09 17:24:13,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:13,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:13,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:13,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197979436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:13,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:13,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440275630] [2021-07-09 17:24:13,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:13,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:13,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:13,917 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:14,102 INFO L93 Difference]: Finished difference Result 474 states and 1217 transitions. [2021-07-09 17:24:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:14,103 INFO L225 Difference]: With dead ends: 474 [2021-07-09 17:24:14,103 INFO L226 Difference]: Without dead ends: 474 [2021-07-09 17:24:14,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-09 17:24:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-07-09 17:24:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-07-09 17:24:14,107 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-07-09 17:24:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:14,107 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-07-09 17:24:14,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-07-09 17:24:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:14,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:14,108 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:14,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9653 [2021-07-09 17:24:14,321 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-07-09 17:24:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:14,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986113868] [2021-07-09 17:24:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:14,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:14,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986113868] [2021-07-09 17:24:14,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986113868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:14,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226494609] [2021-07-09 17:24:14,456 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 [2021-07-09 17:24:14,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:14,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:14,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:14,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:14,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:15,861 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 234 [2021-07-09 17:24:16,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:16,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:16,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:16,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:16,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226494609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:16,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:16,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570006002] [2021-07-09 17:24:16,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:16,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:16,094 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:16,431 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2021-07-09 17:24:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-09 17:24:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:16,432 INFO L225 Difference]: With dead ends: 381 [2021-07-09 17:24:16,432 INFO L226 Difference]: Without dead ends: 376 [2021-07-09 17:24:16,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-09 17:24:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-07-09 17:24:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-07-09 17:24:16,436 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-07-09 17:24:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:16,436 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-07-09 17:24:16,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-07-09 17:24:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:16,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:16,437 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:16,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9654 [2021-07-09 17:24:16,653 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-07-09 17:24:16,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:16,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129746912] [2021-07-09 17:24:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:16,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:16,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129746912] [2021-07-09 17:24:16,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129746912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805095580] [2021-07-09 17:24:16,760 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 [2021-07-09 17:24:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:16,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:17,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:17,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:18,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:18,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:18,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:18,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:18,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805095580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:18,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:18,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562561227] [2021-07-09 17:24:18,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:18,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:18,084 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:18,553 INFO L93 Difference]: Finished difference Result 396 states and 1134 transitions. [2021-07-09 17:24:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:18,554 INFO L225 Difference]: With dead ends: 396 [2021-07-09 17:24:18,554 INFO L226 Difference]: Without dead ends: 391 [2021-07-09 17:24:18,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-09 17:24:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-07-09 17:24:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-07-09 17:24:18,559 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-07-09 17:24:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:18,559 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-07-09 17:24:18,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-07-09 17:24:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:18,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:18,559 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:18,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9843,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:18,773 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-07-09 17:24:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:18,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485373022] [2021-07-09 17:24:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:18,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485373022] [2021-07-09 17:24:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485373022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934688641] [2021-07-09 17:24:18,824 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 [2021-07-09 17:24:18,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:18,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:18,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934688641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:18,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:18,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667839798] [2021-07-09 17:24:18,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:18,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:18,874 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:18,936 INFO L93 Difference]: Finished difference Result 539 states and 1358 transitions. [2021-07-09 17:24:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:18,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:18,937 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:24:18,937 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:24:18,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:24:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:24:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-07-09 17:24:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-07-09 17:24:18,942 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-07-09 17:24:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:18,942 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-07-09 17:24:18,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-07-09 17:24:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:18,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:18,943 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:19,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10082 [2021-07-09 17:24:19,157 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-07-09 17:24:19,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:19,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94854015] [2021-07-09 17:24:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:19,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:19,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94854015] [2021-07-09 17:24:19,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94854015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:19,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801523842] [2021-07-09 17:24:19,198 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 [2021-07-09 17:24:19,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:19,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:19,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:19,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801523842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:19,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:19,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:19,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408368668] [2021-07-09 17:24:19,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:19,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:19,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:19,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:19,251 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:19,311 INFO L93 Difference]: Finished difference Result 516 states and 1352 transitions. [2021-07-09 17:24:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:19,313 INFO L225 Difference]: With dead ends: 516 [2021-07-09 17:24:19,313 INFO L226 Difference]: Without dead ends: 516 [2021-07-09 17:24:19,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-09 17:24:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-07-09 17:24:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-07-09 17:24:19,318 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-07-09 17:24:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:19,318 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-07-09 17:24:19,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-07-09 17:24:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:19,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:19,318 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:19,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10083 [2021-07-09 17:24:19,525 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:19,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:19,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-07-09 17:24:19,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:19,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582957806] [2021-07-09 17:24:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:19,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:19,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582957806] [2021-07-09 17:24:19,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582957806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:19,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843616145] [2021-07-09 17:24:19,617 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 [2021-07-09 17:24:19,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:19,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:19,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:24:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:19,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:19,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:20,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:20,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:20,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:20,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:20,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843616145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:20,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:20,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:24:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401977052] [2021-07-09 17:24:20,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:24:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:24:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:20,327 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:20,631 INFO L93 Difference]: Finished difference Result 420 states and 1201 transitions. [2021-07-09 17:24:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:24:20,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:24:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:20,632 INFO L225 Difference]: With dead ends: 420 [2021-07-09 17:24:20,632 INFO L226 Difference]: Without dead ends: 415 [2021-07-09 17:24:20,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-09 17:24:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-07-09 17:24:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-07-09 17:24:20,637 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-07-09 17:24:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:20,637 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-07-09 17:24:20,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-07-09 17:24:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:20,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:20,637 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:20,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10084,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:20,854 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-07-09 17:24:20,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:20,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72470825] [2021-07-09 17:24:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:20,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:20,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72470825] [2021-07-09 17:24:20,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72470825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287792899] [2021-07-09 17:24:20,896 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 [2021-07-09 17:24:20,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:20,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287792899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:20,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:20,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:20,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715627574] [2021-07-09 17:24:20,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:20,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:20,949 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:21,009 INFO L93 Difference]: Finished difference Result 489 states and 1363 transitions. [2021-07-09 17:24:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:24:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:21,010 INFO L225 Difference]: With dead ends: 489 [2021-07-09 17:24:21,010 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:24:21,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:24:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:24:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-07-09 17:24:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-07-09 17:24:21,015 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-07-09 17:24:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:21,015 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-07-09 17:24:21,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-07-09 17:24:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:21,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:21,016 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:21,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10193 [2021-07-09 17:24:21,220 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:21,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-07-09 17:24:21,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:21,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027824387] [2021-07-09 17:24:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:21,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:21,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027824387] [2021-07-09 17:24:21,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027824387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:21,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709926640] [2021-07-09 17:24:21,259 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 [2021-07-09 17:24:21,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:21,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:21,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709926640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:21,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:21,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:21,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466065488] [2021-07-09 17:24:21,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:21,332 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:21,426 INFO L93 Difference]: Finished difference Result 521 states and 1410 transitions. [2021-07-09 17:24:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:21,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:21,427 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:24:21,427 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:24:21,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:24:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:24:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-07-09 17:24:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-07-09 17:24:21,445 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-07-09 17:24:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:21,445 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-07-09 17:24:21,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-07-09 17:24:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:21,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:21,446 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:21,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10194,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:21,676 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-07-09 17:24:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:21,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163401466] [2021-07-09 17:24:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:21,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:21,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163401466] [2021-07-09 17:24:21,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163401466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:21,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533227904] [2021-07-09 17:24:21,715 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 [2021-07-09 17:24:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:21,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533227904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:21,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:21,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:21,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414272128] [2021-07-09 17:24:21,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:21,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:21,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:21,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:21,768 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:21,881 INFO L93 Difference]: Finished difference Result 501 states and 1377 transitions. [2021-07-09 17:24:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:21,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:21,882 INFO L225 Difference]: With dead ends: 501 [2021-07-09 17:24:21,882 INFO L226 Difference]: Without dead ends: 501 [2021-07-09 17:24:21,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-09 17:24:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-07-09 17:24:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-07-09 17:24:21,887 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-07-09 17:24:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:21,887 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-07-09 17:24:21,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-07-09 17:24:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:21,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:21,894 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:22,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10195,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,109 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:22,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-07-09 17:24:22,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:22,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119046288] [2021-07-09 17:24:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:22,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119046288] [2021-07-09 17:24:22,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119046288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588648360] [2021-07-09 17:24:22,158 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 [2021-07-09 17:24:22,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:22,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588648360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:22,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:22,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222727878] [2021-07-09 17:24:22,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:22,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:22,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:22,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:22,217 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:22,347 INFO L93 Difference]: Finished difference Result 512 states and 1422 transitions. [2021-07-09 17:24:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:22,348 INFO L225 Difference]: With dead ends: 512 [2021-07-09 17:24:22,349 INFO L226 Difference]: Without dead ends: 512 [2021-07-09 17:24:22,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-09 17:24:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-07-09 17:24:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-07-09 17:24:22,367 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-07-09 17:24:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:22,367 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-07-09 17:24:22,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-07-09 17:24:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:24:22,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:22,368 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:22,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10196,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,596 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:22,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:22,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-07-09 17:24:22,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:22,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045034089] [2021-07-09 17:24:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045034089] [2021-07-09 17:24:22,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045034089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220987988] [2021-07-09 17:24:22,645 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:24:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220987988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:22,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690297576] [2021-07-09 17:24:22,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:22,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:22,700 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:22,817 INFO L93 Difference]: Finished difference Result 594 states and 1635 transitions. [2021-07-09 17:24:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:22,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:22,818 INFO L225 Difference]: With dead ends: 594 [2021-07-09 17:24:22,818 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:24:22,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:24:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-07-09 17:24:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-07-09 17:24:22,824 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-07-09 17:24:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:22,824 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-07-09 17:24:22,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-07-09 17:24:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:22,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:22,825 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:23,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10197,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,041 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-07-09 17:24:23,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:23,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409367077] [2021-07-09 17:24:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:23,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409367077] [2021-07-09 17:24:23,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409367077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348815505] [2021-07-09 17:24:23,112 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:23,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:23,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348815505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:23,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:23,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435777704] [2021-07-09 17:24:23,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:23,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:23,173 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:23,283 INFO L93 Difference]: Finished difference Result 532 states and 1448 transitions. [2021-07-09 17:24:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:23,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:23,284 INFO L225 Difference]: With dead ends: 532 [2021-07-09 17:24:23,284 INFO L226 Difference]: Without dead ends: 532 [2021-07-09 17:24:23,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:24:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-09 17:24:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-07-09 17:24:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-07-09 17:24:23,289 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-07-09 17:24:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:23,289 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-07-09 17:24:23,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-07-09 17:24:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:23,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:23,290 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:23,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10198 [2021-07-09 17:24:23,506 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:23,507 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-07-09 17:24:23,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:23,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108857693] [2021-07-09 17:24:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:23,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:23,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108857693] [2021-07-09 17:24:23,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108857693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117190252] [2021-07-09 17:24:23,554 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:23,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:23,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117190252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:23,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:23,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513752005] [2021-07-09 17:24:23,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:23,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:23,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:23,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:23,607 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:23,807 INFO L93 Difference]: Finished difference Result 606 states and 1593 transitions. [2021-07-09 17:24:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:23,808 INFO L225 Difference]: With dead ends: 606 [2021-07-09 17:24:23,808 INFO L226 Difference]: Without dead ends: 597 [2021-07-09 17:24:23,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-09 17:24:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-07-09 17:24:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-07-09 17:24:23,813 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-07-09 17:24:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:23,814 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-07-09 17:24:23,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-07-09 17:24:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:23,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:23,814 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:24,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10199 [2021-07-09 17:24:24,015 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-07-09 17:24:24,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:24,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594836479] [2021-07-09 17:24:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:24,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594836479] [2021-07-09 17:24:24,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594836479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472494675] [2021-07-09 17:24:24,062 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:24,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:24,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:24,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:24,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472494675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:24,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:24,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638114260] [2021-07-09 17:24:24,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:24,116 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:24,230 INFO L93 Difference]: Finished difference Result 466 states and 1355 transitions. [2021-07-09 17:24:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:24,231 INFO L225 Difference]: With dead ends: 466 [2021-07-09 17:24:24,231 INFO L226 Difference]: Without dead ends: 462 [2021-07-09 17:24:24,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-09 17:24:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-07-09 17:24:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-07-09 17:24:24,237 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-07-09 17:24:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:24,237 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-07-09 17:24:24,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-07-09 17:24:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:24,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:24,237 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:24,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10200 [2021-07-09 17:24:24,455 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-07-09 17:24:24,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:24,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640590852] [2021-07-09 17:24:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:24,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640590852] [2021-07-09 17:24:24,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640590852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530241206] [2021-07-09 17:24:24,501 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530241206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:24,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:24,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992943230] [2021-07-09 17:24:24,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:24,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:24,558 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:24,625 INFO L93 Difference]: Finished difference Result 597 states and 1562 transitions. [2021-07-09 17:24:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:24,626 INFO L225 Difference]: With dead ends: 597 [2021-07-09 17:24:24,626 INFO L226 Difference]: Without dead ends: 597 [2021-07-09 17:24:24,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-09 17:24:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-07-09 17:24:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-07-09 17:24:24,631 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-07-09 17:24:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:24,631 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-07-09 17:24:24,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-07-09 17:24:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:24,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:24,632 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:24,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10201 [2021-07-09 17:24:24,845 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:24,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-07-09 17:24:24,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:24,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88446631] [2021-07-09 17:24:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88446631] [2021-07-09 17:24:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88446631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217135562] [2021-07-09 17:24:24,887 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:24,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:24,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217135562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:24,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:24,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201092498] [2021-07-09 17:24:24,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:24,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:24,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:24,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:24,940 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:25,044 INFO L93 Difference]: Finished difference Result 489 states and 1403 transitions. [2021-07-09 17:24:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:25,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:25,045 INFO L225 Difference]: With dead ends: 489 [2021-07-09 17:24:25,046 INFO L226 Difference]: Without dead ends: 485 [2021-07-09 17:24:25,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:24:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-09 17:24:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-07-09 17:24:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-07-09 17:24:25,050 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-07-09 17:24:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:25,050 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-07-09 17:24:25,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-07-09 17:24:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:25,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:25,051 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:25,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10202,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:25,268 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-07-09 17:24:25,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:25,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052322260] [2021-07-09 17:24:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:25,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:25,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052322260] [2021-07-09 17:24:25,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052322260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:25,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297001809] [2021-07-09 17:24:25,308 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:25,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:25,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:25,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297001809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:25,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:25,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:25,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076812853] [2021-07-09 17:24:25,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:25,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:25,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:25,370 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:25,440 INFO L93 Difference]: Finished difference Result 636 states and 1639 transitions. [2021-07-09 17:24:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:25,442 INFO L225 Difference]: With dead ends: 636 [2021-07-09 17:24:25,442 INFO L226 Difference]: Without dead ends: 636 [2021-07-09 17:24:25,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-09 17:24:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-07-09 17:24:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-07-09 17:24:25,447 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-07-09 17:24:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:25,447 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-07-09 17:24:25,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-07-09 17:24:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:25,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:25,448 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:25,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10203 [2021-07-09 17:24:25,664 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:25,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-07-09 17:24:25,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:25,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793500319] [2021-07-09 17:24:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:25,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:25,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793500319] [2021-07-09 17:24:25,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793500319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:25,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29821082] [2021-07-09 17:24:25,706 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:25,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:25,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:25,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:25,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29821082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:25,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:25,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:25,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139794236] [2021-07-09 17:24:25,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:25,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:25,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:25,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:25,761 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:25,851 INFO L93 Difference]: Finished difference Result 488 states and 1377 transitions. [2021-07-09 17:24:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:25,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:25,852 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:24:25,852 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:24:25,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:24:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-07-09 17:24:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-07-09 17:24:25,857 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-07-09 17:24:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:25,857 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-07-09 17:24:25,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-07-09 17:24:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:25,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:25,858 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:26,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10204,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,075 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-07-09 17:24:26,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:26,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935382220] [2021-07-09 17:24:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:26,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935382220] [2021-07-09 17:24:26,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935382220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518809582] [2021-07-09 17:24:26,115 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:26,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518809582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:26,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:26,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482313173] [2021-07-09 17:24:26,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:26,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:26,176 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:26,275 INFO L93 Difference]: Finished difference Result 668 states and 1705 transitions. [2021-07-09 17:24:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:24:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:26,276 INFO L225 Difference]: With dead ends: 668 [2021-07-09 17:24:26,276 INFO L226 Difference]: Without dead ends: 668 [2021-07-09 17:24:26,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-09 17:24:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-07-09 17:24:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-07-09 17:24:26,282 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-07-09 17:24:26,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:26,282 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-07-09 17:24:26,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-07-09 17:24:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:26,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:26,283 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:26,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10205 [2021-07-09 17:24:26,500 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:26,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-07-09 17:24:26,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:26,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180184307] [2021-07-09 17:24:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:26,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180184307] [2021-07-09 17:24:26,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180184307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113746955] [2021-07-09 17:24:26,547 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:26,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:26,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113746955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:26,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:26,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581876625] [2021-07-09 17:24:26,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:26,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:26,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:26,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:26,599 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:26,681 INFO L93 Difference]: Finished difference Result 521 states and 1480 transitions. [2021-07-09 17:24:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:26,682 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:24:26,682 INFO L226 Difference]: Without dead ends: 513 [2021-07-09 17:24:26,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-09 17:24:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-07-09 17:24:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-07-09 17:24:26,687 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-07-09 17:24:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:26,687 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-07-09 17:24:26,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-07-09 17:24:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:26,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:26,688 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:26,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10206,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,904 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:26,905 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-07-09 17:24:26,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:26,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692909896] [2021-07-09 17:24:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:26,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692909896] [2021-07-09 17:24:26,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692909896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761180725] [2021-07-09 17:24:26,948 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:27,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761180725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:27,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:27,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622512226] [2021-07-09 17:24:27,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:27,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:27,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:27,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:27,003 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:27,154 INFO L93 Difference]: Finished difference Result 690 states and 1758 transitions. [2021-07-09 17:24:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:27,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:27,155 INFO L225 Difference]: With dead ends: 690 [2021-07-09 17:24:27,156 INFO L226 Difference]: Without dead ends: 690 [2021-07-09 17:24:27,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-07-09 17:24:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-07-09 17:24:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-07-09 17:24:27,161 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-07-09 17:24:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:27,161 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-07-09 17:24:27,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-07-09 17:24:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:27,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:27,162 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:27,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10207 [2021-07-09 17:24:27,379 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-07-09 17:24:27,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:27,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891398005] [2021-07-09 17:24:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:27,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891398005] [2021-07-09 17:24:27,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891398005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614040875] [2021-07-09 17:24:27,407 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:27,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:27,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:24:27,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614040875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:27,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:24:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949123431] [2021-07-09 17:24:27,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:27,463 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:27,513 INFO L93 Difference]: Finished difference Result 587 states and 1642 transitions. [2021-07-09 17:24:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:24:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:27,514 INFO L225 Difference]: With dead ends: 587 [2021-07-09 17:24:27,514 INFO L226 Difference]: Without dead ends: 587 [2021-07-09 17:24:27,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-07-09 17:24:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-07-09 17:24:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-07-09 17:24:27,520 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-07-09 17:24:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:27,520 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-07-09 17:24:27,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-07-09 17:24:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:27,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:27,521 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:27,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10208,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,738 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:27,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-07-09 17:24:27,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:27,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810318622] [2021-07-09 17:24:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:27,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:27,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810318622] [2021-07-09 17:24:27,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810318622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808934663] [2021-07-09 17:24:27,766 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:27,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:24:27,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808934663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:27,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:24:27,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055941069] [2021-07-09 17:24:27,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:27,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:27,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:27,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:27,817 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:27,905 INFO L93 Difference]: Finished difference Result 581 states and 1594 transitions. [2021-07-09 17:24:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:24:27,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:27,906 INFO L225 Difference]: With dead ends: 581 [2021-07-09 17:24:27,906 INFO L226 Difference]: Without dead ends: 579 [2021-07-09 17:24:27,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:24:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-09 17:24:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-07-09 17:24:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-07-09 17:24:27,911 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-07-09 17:24:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:27,911 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-07-09 17:24:27,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-07-09 17:24:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:27,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:27,912 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:28,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10209 [2021-07-09 17:24:28,129 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-07-09 17:24:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:28,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468331463] [2021-07-09 17:24:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:28,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:28,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468331463] [2021-07-09 17:24:28,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468331463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658649542] [2021-07-09 17:24:28,160 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:28,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:28,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:28,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:28,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658649542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:28,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:28,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948027064] [2021-07-09 17:24:28,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:28,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:28,213 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:28,266 INFO L93 Difference]: Finished difference Result 595 states and 1618 transitions. [2021-07-09 17:24:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:24:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-09 17:24:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:28,267 INFO L225 Difference]: With dead ends: 595 [2021-07-09 17:24:28,267 INFO L226 Difference]: Without dead ends: 595 [2021-07-09 17:24:28,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-09 17:24:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-07-09 17:24:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-07-09 17:24:28,273 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-07-09 17:24:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:28,274 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-07-09 17:24:28,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-07-09 17:24:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:28,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:28,274 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:28,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10210,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:28,491 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-07-09 17:24:28,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:28,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743344227] [2021-07-09 17:24:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:28,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:28,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743344227] [2021-07-09 17:24:28,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743344227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317671928] [2021-07-09 17:24:28,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:28,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:28,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317671928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:28,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:28,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982303562] [2021-07-09 17:24:28,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:28,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:28,591 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:28,661 INFO L93 Difference]: Finished difference Result 631 states and 1678 transitions. [2021-07-09 17:24:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:28,662 INFO L225 Difference]: With dead ends: 631 [2021-07-09 17:24:28,662 INFO L226 Difference]: Without dead ends: 631 [2021-07-09 17:24:28,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-09 17:24:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-07-09 17:24:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-07-09 17:24:28,668 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-07-09 17:24:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:28,668 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-07-09 17:24:28,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-07-09 17:24:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:28,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:28,669 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:28,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10211 [2021-07-09 17:24:28,885 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-07-09 17:24:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889021818] [2021-07-09 17:24:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:28,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:28,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889021818] [2021-07-09 17:24:28,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889021818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578844769] [2021-07-09 17:24:28,928 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:28,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:28,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:28,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:28,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578844769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:28,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:28,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772556810] [2021-07-09 17:24:28,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:28,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:28,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:28,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:28,978 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:29,089 INFO L93 Difference]: Finished difference Result 578 states and 1659 transitions. [2021-07-09 17:24:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:29,090 INFO L225 Difference]: With dead ends: 578 [2021-07-09 17:24:29,090 INFO L226 Difference]: Without dead ends: 570 [2021-07-09 17:24:29,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-09 17:24:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-07-09 17:24:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-07-09 17:24:29,096 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-07-09 17:24:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:29,096 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-07-09 17:24:29,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-07-09 17:24:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:29,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:29,097 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:29,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10212 [2021-07-09 17:24:29,298 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:29,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:29,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-07-09 17:24:29,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:29,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658346940] [2021-07-09 17:24:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:29,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658346940] [2021-07-09 17:24:29,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658346940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489210616] [2021-07-09 17:24:29,339 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489210616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:29,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:29,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445416689] [2021-07-09 17:24:29,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:29,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:29,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:29,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:29,392 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:29,524 INFO L93 Difference]: Finished difference Result 678 states and 1771 transitions. [2021-07-09 17:24:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:29,525 INFO L225 Difference]: With dead ends: 678 [2021-07-09 17:24:29,525 INFO L226 Difference]: Without dead ends: 678 [2021-07-09 17:24:29,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-09 17:24:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-07-09 17:24:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-07-09 17:24:29,531 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-07-09 17:24:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:29,531 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-07-09 17:24:29,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-07-09 17:24:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:29,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:29,532 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:29,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10213 [2021-07-09 17:24:29,749 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-07-09 17:24:29,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:29,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889276691] [2021-07-09 17:24:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:29,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889276691] [2021-07-09 17:24:29,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889276691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366955383] [2021-07-09 17:24:29,796 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:29,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:29,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366955383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:29,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532610039] [2021-07-09 17:24:29,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:29,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:29,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:29,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:29,867 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:29,984 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-07-09 17:24:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:29,984 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:29,985 INFO L225 Difference]: With dead ends: 606 [2021-07-09 17:24:29,985 INFO L226 Difference]: Without dead ends: 596 [2021-07-09 17:24:29,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:24:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-07-09 17:24:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-07-09 17:24:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-07-09 17:24:29,991 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-07-09 17:24:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:29,991 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-07-09 17:24:29,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-07-09 17:24:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:29,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:29,992 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:30,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10214,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:30,208 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:30,208 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-07-09 17:24:30,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:30,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228893291] [2021-07-09 17:24:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:30,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:30,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228893291] [2021-07-09 17:24:30,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228893291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:30,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255480548] [2021-07-09 17:24:30,254 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:30,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:30,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255480548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:30,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:30,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:30,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267937773] [2021-07-09 17:24:30,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:30,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:30,317 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:30,509 INFO L93 Difference]: Finished difference Result 741 states and 1915 transitions. [2021-07-09 17:24:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:24:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:30,511 INFO L225 Difference]: With dead ends: 741 [2021-07-09 17:24:30,511 INFO L226 Difference]: Without dead ends: 741 [2021-07-09 17:24:30,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-07-09 17:24:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-07-09 17:24:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-07-09 17:24:30,517 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-07-09 17:24:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:30,517 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-07-09 17:24:30,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-07-09 17:24:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:30,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:30,518 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:30,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10215 [2021-07-09 17:24:30,734 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:30,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:30,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-07-09 17:24:30,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:30,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943374529] [2021-07-09 17:24:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:30,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:30,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943374529] [2021-07-09 17:24:30,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943374529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:30,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299146287] [2021-07-09 17:24:30,790 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:30,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:30,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299146287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:30,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:30,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:30,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325547344] [2021-07-09 17:24:30,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:30,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:30,865 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:30,927 INFO L93 Difference]: Finished difference Result 658 states and 1841 transitions. [2021-07-09 17:24:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:24:30,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-09 17:24:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:30,928 INFO L225 Difference]: With dead ends: 658 [2021-07-09 17:24:30,928 INFO L226 Difference]: Without dead ends: 658 [2021-07-09 17:24:30,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-07-09 17:24:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-07-09 17:24:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-07-09 17:24:30,935 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-07-09 17:24:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:30,935 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-07-09 17:24:30,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-07-09 17:24:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:30,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:30,936 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:31,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10216,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:31,152 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:31,153 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-07-09 17:24:31,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:31,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208049897] [2021-07-09 17:24:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:31,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:31,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208049897] [2021-07-09 17:24:31,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208049897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786213123] [2021-07-09 17:24:31,184 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:31,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:31,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786213123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:31,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:31,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420056432] [2021-07-09 17:24:31,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:31,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:31,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:31,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:31,235 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:31,334 INFO L93 Difference]: Finished difference Result 668 states and 1844 transitions. [2021-07-09 17:24:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-09 17:24:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:31,336 INFO L225 Difference]: With dead ends: 668 [2021-07-09 17:24:31,336 INFO L226 Difference]: Without dead ends: 666 [2021-07-09 17:24:31,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-09 17:24:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-07-09 17:24:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-07-09 17:24:31,342 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-07-09 17:24:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:31,342 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-07-09 17:24:31,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-07-09 17:24:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:31,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:31,343 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:31,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10217 [2021-07-09 17:24:31,557 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-07-09 17:24:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:31,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780624898] [2021-07-09 17:24:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:31,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:31,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780624898] [2021-07-09 17:24:31,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780624898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19074065] [2021-07-09 17:24:31,591 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:31,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:31,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19074065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:31,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:31,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880540537] [2021-07-09 17:24:31,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:31,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:31,643 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:31,733 INFO L93 Difference]: Finished difference Result 664 states and 1886 transitions. [2021-07-09 17:24:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-09 17:24:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:31,734 INFO L225 Difference]: With dead ends: 664 [2021-07-09 17:24:31,734 INFO L226 Difference]: Without dead ends: 662 [2021-07-09 17:24:31,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-07-09 17:24:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-07-09 17:24:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-07-09 17:24:31,740 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-07-09 17:24:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:31,740 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-07-09 17:24:31,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-07-09 17:24:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:31,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:31,741 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:31,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10218,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:31,957 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:31,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:31,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-07-09 17:24:31,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:31,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841836074] [2021-07-09 17:24:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:31,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841836074] [2021-07-09 17:24:31,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841836074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158244796] [2021-07-09 17:24:31,989 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:32,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:32,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158244796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:32,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:24:32,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461620242] [2021-07-09 17:24:32,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:32,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:32,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:32,067 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:32,119 INFO L93 Difference]: Finished difference Result 657 states and 1827 transitions. [2021-07-09 17:24:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:24:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-09 17:24:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:32,120 INFO L225 Difference]: With dead ends: 657 [2021-07-09 17:24:32,120 INFO L226 Difference]: Without dead ends: 657 [2021-07-09 17:24:32,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-07-09 17:24:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-07-09 17:24:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-07-09 17:24:32,126 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-07-09 17:24:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:32,126 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-07-09 17:24:32,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-09 17:24:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-07-09 17:24:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:32,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:32,127 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10219 [2021-07-09 17:24:32,344 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-07-09 17:24:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206415779] [2021-07-09 17:24:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:32,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206415779] [2021-07-09 17:24:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206415779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965317372] [2021-07-09 17:24:32,380 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:32,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:32,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:32,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965317372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:32,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:32,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590398101] [2021-07-09 17:24:32,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:32,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:32,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:32,431 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:32,496 INFO L93 Difference]: Finished difference Result 654 states and 1817 transitions. [2021-07-09 17:24:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:32,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:32,497 INFO L225 Difference]: With dead ends: 654 [2021-07-09 17:24:32,497 INFO L226 Difference]: Without dead ends: 654 [2021-07-09 17:24:32,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-07-09 17:24:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-07-09 17:24:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-07-09 17:24:32,503 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-07-09 17:24:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:32,503 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-07-09 17:24:32,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-07-09 17:24:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:32,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:32,504 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:32,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10220,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:32,721 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-07-09 17:24:32,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:32,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945126782] [2021-07-09 17:24:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:32,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:32,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945126782] [2021-07-09 17:24:32,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945126782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304155643] [2021-07-09 17:24:32,769 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:32,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:32,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:32,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:32,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304155643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:32,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:32,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960448114] [2021-07-09 17:24:32,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:32,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:32,821 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:32,936 INFO L93 Difference]: Finished difference Result 678 states and 1970 transitions. [2021-07-09 17:24:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:32,937 INFO L225 Difference]: With dead ends: 678 [2021-07-09 17:24:32,937 INFO L226 Difference]: Without dead ends: 670 [2021-07-09 17:24:32,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:24:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-07-09 17:24:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-07-09 17:24:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-07-09 17:24:32,944 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-07-09 17:24:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:32,944 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-07-09 17:24:32,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-07-09 17:24:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:32,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:32,945 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:33,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10221 [2021-07-09 17:24:33,162 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:33,162 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-07-09 17:24:33,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:33,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548764012] [2021-07-09 17:24:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:33,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548764012] [2021-07-09 17:24:33,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548764012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:33,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055180898] [2021-07-09 17:24:33,212 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:33,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:33,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055180898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:33,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:33,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:33,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523617447] [2021-07-09 17:24:33,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:33,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:33,274 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:33,399 INFO L93 Difference]: Finished difference Result 717 states and 1973 transitions. [2021-07-09 17:24:33,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:24:33,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:33,400 INFO L225 Difference]: With dead ends: 717 [2021-07-09 17:24:33,400 INFO L226 Difference]: Without dead ends: 717 [2021-07-09 17:24:33,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-09 17:24:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-07-09 17:24:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-07-09 17:24:33,407 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-07-09 17:24:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:33,407 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-07-09 17:24:33,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-07-09 17:24:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:33,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:33,408 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:33,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10222 [2021-07-09 17:24:33,624 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-07-09 17:24:33,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:33,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686045098] [2021-07-09 17:24:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:33,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686045098] [2021-07-09 17:24:33,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686045098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:33,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072613853] [2021-07-09 17:24:33,689 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:33,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:33,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072613853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:33,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:33,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669818415] [2021-07-09 17:24:33,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:33,790 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:33,937 INFO L93 Difference]: Finished difference Result 704 states and 2024 transitions. [2021-07-09 17:24:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:33,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:33,939 INFO L225 Difference]: With dead ends: 704 [2021-07-09 17:24:33,939 INFO L226 Difference]: Without dead ends: 694 [2021-07-09 17:24:33,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-07-09 17:24:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-07-09 17:24:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-07-09 17:24:33,946 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-07-09 17:24:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:33,946 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-07-09 17:24:33,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-07-09 17:24:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:33,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:33,947 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:34,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10223 [2021-07-09 17:24:34,165 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:34,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-07-09 17:24:34,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:34,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081905881] [2021-07-09 17:24:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:34,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081905881] [2021-07-09 17:24:34,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081905881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947611065] [2021-07-09 17:24:34,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:34,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:24:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:34,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947611065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:34,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:34,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615149394] [2021-07-09 17:24:34,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:34,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:34,271 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:34,472 INFO L93 Difference]: Finished difference Result 763 states and 2067 transitions. [2021-07-09 17:24:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:34,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:34,473 INFO L225 Difference]: With dead ends: 763 [2021-07-09 17:24:34,473 INFO L226 Difference]: Without dead ends: 763 [2021-07-09 17:24:34,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-07-09 17:24:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-07-09 17:24:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-07-09 17:24:34,480 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-07-09 17:24:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:34,480 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-07-09 17:24:34,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-07-09 17:24:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:34,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:34,481 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:34,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-07-09 17:24:34,682 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:34,682 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-07-09 17:24:34,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:34,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483126520] [2021-07-09 17:24:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:34,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483126520] [2021-07-09 17:24:34,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483126520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151698301] [2021-07-09 17:24:34,744 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151698301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:34,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:34,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652493331] [2021-07-09 17:24:34,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:34,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:34,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:34,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:34,800 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:34,857 INFO L93 Difference]: Finished difference Result 610 states and 1818 transitions. [2021-07-09 17:24:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:24:34,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:34,858 INFO L225 Difference]: With dead ends: 610 [2021-07-09 17:24:34,859 INFO L226 Difference]: Without dead ends: 598 [2021-07-09 17:24:34,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-07-09 17:24:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-07-09 17:24:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-07-09 17:24:34,865 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-07-09 17:24:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:34,865 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-07-09 17:24:34,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,865 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-07-09 17:24:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:34,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:34,866 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:35,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10225,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:35,081 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-07-09 17:24:35,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:35,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670480944] [2021-07-09 17:24:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670480944] [2021-07-09 17:24:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670480944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646639356] [2021-07-09 17:24:35,126 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:35,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:35,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646639356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:35,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:35,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940594772] [2021-07-09 17:24:35,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:35,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:35,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:35,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:35,189 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:35,405 INFO L93 Difference]: Finished difference Result 855 states and 2351 transitions. [2021-07-09 17:24:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:35,406 INFO L225 Difference]: With dead ends: 855 [2021-07-09 17:24:35,406 INFO L226 Difference]: Without dead ends: 855 [2021-07-09 17:24:35,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:24:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-07-09 17:24:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-07-09 17:24:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-07-09 17:24:35,413 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-07-09 17:24:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:35,413 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-07-09 17:24:35,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-07-09 17:24:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:35,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:35,414 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:35,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10226 [2021-07-09 17:24:35,630 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-07-09 17:24:35,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:35,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136556139] [2021-07-09 17:24:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:35,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136556139] [2021-07-09 17:24:35,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136556139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8571586] [2021-07-09 17:24:35,667 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:35,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:35,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:35,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:35,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8571586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:35,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:35,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833075706] [2021-07-09 17:24:35,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:35,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:35,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:35,726 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:35,777 INFO L93 Difference]: Finished difference Result 817 states and 2337 transitions. [2021-07-09 17:24:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:35,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:35,778 INFO L225 Difference]: With dead ends: 817 [2021-07-09 17:24:35,778 INFO L226 Difference]: Without dead ends: 817 [2021-07-09 17:24:35,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-07-09 17:24:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-07-09 17:24:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-07-09 17:24:35,804 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-07-09 17:24:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:35,804 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-07-09 17:24:35,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-07-09 17:24:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:35,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:35,805 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:36,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10227,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,036 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-07-09 17:24:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:36,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985621621] [2021-07-09 17:24:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:36,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:36,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985621621] [2021-07-09 17:24:36,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985621621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672477774] [2021-07-09 17:24:36,081 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:36,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672477774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:36,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:36,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811110619] [2021-07-09 17:24:36,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:36,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:36,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:36,128 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:36,233 INFO L93 Difference]: Finished difference Result 820 states and 2329 transitions. [2021-07-09 17:24:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:36,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:36,234 INFO L225 Difference]: With dead ends: 820 [2021-07-09 17:24:36,234 INFO L226 Difference]: Without dead ends: 818 [2021-07-09 17:24:36,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-07-09 17:24:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-07-09 17:24:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-07-09 17:24:36,242 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-07-09 17:24:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:36,242 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-07-09 17:24:36,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-07-09 17:24:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:36,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:36,243 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:36,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10228,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,459 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-07-09 17:24:36,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:36,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485604605] [2021-07-09 17:24:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:36,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:36,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485604605] [2021-07-09 17:24:36,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485604605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931719628] [2021-07-09 17:24:36,494 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:36,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:36,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:36,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:36,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931719628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:36,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465067357] [2021-07-09 17:24:36,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:36,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:36,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:36,541 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:36,633 INFO L93 Difference]: Finished difference Result 822 states and 2381 transitions. [2021-07-09 17:24:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:36,650 INFO L225 Difference]: With dead ends: 822 [2021-07-09 17:24:36,650 INFO L226 Difference]: Without dead ends: 820 [2021-07-09 17:24:36,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-09 17:24:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-07-09 17:24:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-07-09 17:24:36,658 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-07-09 17:24:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:36,658 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-07-09 17:24:36,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-07-09 17:24:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:36,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:36,659 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:36,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10229,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,888 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-07-09 17:24:36,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:36,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687412922] [2021-07-09 17:24:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:36,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:36,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687412922] [2021-07-09 17:24:36,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687412922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876880951] [2021-07-09 17:24:36,934 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:36,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:36,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:36,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876880951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:36,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739845136] [2021-07-09 17:24:36,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:36,986 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:37,039 INFO L93 Difference]: Finished difference Result 797 states and 2254 transitions. [2021-07-09 17:24:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,041 INFO L225 Difference]: With dead ends: 797 [2021-07-09 17:24:37,041 INFO L226 Difference]: Without dead ends: 797 [2021-07-09 17:24:37,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:24:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-07-09 17:24:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-07-09 17:24:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-07-09 17:24:37,048 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-07-09 17:24:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:37,048 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-07-09 17:24:37,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-07-09 17:24:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:37,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:37,049 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:37,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10230,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:37,265 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-07-09 17:24:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:37,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636972686] [2021-07-09 17:24:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:37,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636972686] [2021-07-09 17:24:37,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636972686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066468595] [2021-07-09 17:24:37,300 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:37,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:37,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066468595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:37,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:37,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:37,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083308230] [2021-07-09 17:24:37,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:37,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:37,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:37,347 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:37,438 INFO L93 Difference]: Finished difference Result 795 states and 2316 transitions. [2021-07-09 17:24:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,440 INFO L225 Difference]: With dead ends: 795 [2021-07-09 17:24:37,440 INFO L226 Difference]: Without dead ends: 791 [2021-07-09 17:24:37,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-07-09 17:24:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-07-09 17:24:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-07-09 17:24:37,448 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-07-09 17:24:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:37,448 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-07-09 17:24:37,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-07-09 17:24:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:37,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:37,449 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:37,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10231 [2021-07-09 17:24:37,665 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-07-09 17:24:37,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:37,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980160142] [2021-07-09 17:24:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:37,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:37,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980160142] [2021-07-09 17:24:37,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980160142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:37,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136624711] [2021-07-09 17:24:37,699 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:37,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:37,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:37,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136624711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:37,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:37,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:37,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144822787] [2021-07-09 17:24:37,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:37,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:37,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:37,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:37,747 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:37,806 INFO L93 Difference]: Finished difference Result 759 states and 2167 transitions. [2021-07-09 17:24:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,807 INFO L225 Difference]: With dead ends: 759 [2021-07-09 17:24:37,807 INFO L226 Difference]: Without dead ends: 759 [2021-07-09 17:24:37,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-07-09 17:24:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-07-09 17:24:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-07-09 17:24:37,814 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-07-09 17:24:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:37,814 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-07-09 17:24:37,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-07-09 17:24:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:37,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:37,815 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:38,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10232 [2021-07-09 17:24:38,031 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:38,032 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-07-09 17:24:38,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:38,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291130994] [2021-07-09 17:24:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:38,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:38,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291130994] [2021-07-09 17:24:38,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291130994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:38,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301197799] [2021-07-09 17:24:38,071 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:38,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:38,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301197799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:38,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:38,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:38,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017768464] [2021-07-09 17:24:38,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:38,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:38,120 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:38,241 INFO L93 Difference]: Finished difference Result 713 states and 2090 transitions. [2021-07-09 17:24:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:38,243 INFO L225 Difference]: With dead ends: 713 [2021-07-09 17:24:38,243 INFO L226 Difference]: Without dead ends: 705 [2021-07-09 17:24:38,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-07-09 17:24:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-07-09 17:24:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-07-09 17:24:38,251 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-07-09 17:24:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:38,251 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-07-09 17:24:38,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-07-09 17:24:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:38,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:38,252 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:38,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10233 [2021-07-09 17:24:38,452 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-07-09 17:24:38,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:38,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590412300] [2021-07-09 17:24:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:38,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:38,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590412300] [2021-07-09 17:24:38,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590412300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:38,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593297755] [2021-07-09 17:24:38,497 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:38,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:38,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593297755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:38,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:38,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:38,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001922727] [2021-07-09 17:24:38,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:38,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:38,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:38,554 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:38,655 INFO L93 Difference]: Finished difference Result 748 states and 2153 transitions. [2021-07-09 17:24:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:38,657 INFO L225 Difference]: With dead ends: 748 [2021-07-09 17:24:38,657 INFO L226 Difference]: Without dead ends: 748 [2021-07-09 17:24:38,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:24:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-07-09 17:24:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-07-09 17:24:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-07-09 17:24:38,664 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-07-09 17:24:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:38,664 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-07-09 17:24:38,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-07-09 17:24:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:38,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:38,665 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:38,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10234 [2021-07-09 17:24:38,882 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:38,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-07-09 17:24:38,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:38,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728069510] [2021-07-09 17:24:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:38,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:38,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728069510] [2021-07-09 17:24:38,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728069510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:38,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408396540] [2021-07-09 17:24:38,926 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:38,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:38,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:38,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:38,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408396540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:38,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:38,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:38,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241912474] [2021-07-09 17:24:38,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:38,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:38,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:38,984 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:39,115 INFO L93 Difference]: Finished difference Result 772 states and 2234 transitions. [2021-07-09 17:24:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:39,117 INFO L225 Difference]: With dead ends: 772 [2021-07-09 17:24:39,117 INFO L226 Difference]: Without dead ends: 762 [2021-07-09 17:24:39,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-09 17:24:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-07-09 17:24:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-07-09 17:24:39,125 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-07-09 17:24:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:39,125 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-07-09 17:24:39,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-07-09 17:24:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:39,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:39,126 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:39,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10235,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:39,342 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:39,342 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-07-09 17:24:39,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:39,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688577779] [2021-07-09 17:24:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:39,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688577779] [2021-07-09 17:24:39,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688577779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142426054] [2021-07-09 17:24:39,384 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:39,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:24:39,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142426054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:39,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:39,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667345376] [2021-07-09 17:24:39,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:39,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:39,449 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:39,624 INFO L93 Difference]: Finished difference Result 764 states and 2153 transitions. [2021-07-09 17:24:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:39,625 INFO L225 Difference]: With dead ends: 764 [2021-07-09 17:24:39,625 INFO L226 Difference]: Without dead ends: 764 [2021-07-09 17:24:39,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-07-09 17:24:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-07-09 17:24:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-07-09 17:24:39,633 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-07-09 17:24:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:39,633 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-07-09 17:24:39,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-07-09 17:24:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:39,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:39,634 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:39,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10236 [2021-07-09 17:24:39,851 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-07-09 17:24:39,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:39,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804951698] [2021-07-09 17:24:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:39,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804951698] [2021-07-09 17:24:39,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804951698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605078837] [2021-07-09 17:24:39,898 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 [2021-07-09 17:24:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:39,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:39,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605078837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:39,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612525170] [2021-07-09 17:24:39,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:39,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:39,954 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:40,014 INFO L93 Difference]: Finished difference Result 677 states and 2039 transitions. [2021-07-09 17:24:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:40,015 INFO L225 Difference]: With dead ends: 677 [2021-07-09 17:24:40,015 INFO L226 Difference]: Without dead ends: 665 [2021-07-09 17:24:40,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-07-09 17:24:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-07-09 17:24:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-07-09 17:24:40,023 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-07-09 17:24:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:40,023 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-07-09 17:24:40,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-07-09 17:24:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:40,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:40,024 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:40,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10237,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:40,240 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:40,241 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-07-09 17:24:40,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:40,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789006352] [2021-07-09 17:24:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789006352] [2021-07-09 17:24:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789006352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682429447] [2021-07-09 17:24:40,284 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 [2021-07-09 17:24:40,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682429447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:40,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:40,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:40,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387613523] [2021-07-09 17:24:40,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:40,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:40,345 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:40,529 INFO L93 Difference]: Finished difference Result 742 states and 2108 transitions. [2021-07-09 17:24:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:40,531 INFO L225 Difference]: With dead ends: 742 [2021-07-09 17:24:40,531 INFO L226 Difference]: Without dead ends: 742 [2021-07-09 17:24:40,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-09 17:24:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-07-09 17:24:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-07-09 17:24:40,538 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-07-09 17:24:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:40,538 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-07-09 17:24:40,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-07-09 17:24:40,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:40,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:40,539 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:40,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10238 [2021-07-09 17:24:40,757 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-07-09 17:24:40,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:40,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051102923] [2021-07-09 17:24:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:40,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051102923] [2021-07-09 17:24:40,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051102923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:40,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748604364] [2021-07-09 17:24:40,809 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 [2021-07-09 17:24:40,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:40,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:40,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748604364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:40,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:40,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:40,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179172354] [2021-07-09 17:24:40,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:40,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:40,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:40,874 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:40,931 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-07-09 17:24:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:24:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:40,933 INFO L225 Difference]: With dead ends: 671 [2021-07-09 17:24:40,933 INFO L226 Difference]: Without dead ends: 657 [2021-07-09 17:24:40,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-07-09 17:24:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-07-09 17:24:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 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) [2021-07-09 17:24:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-07-09 17:24:40,940 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-07-09 17:24:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:40,940 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-07-09 17:24:40,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-07-09 17:24:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:40,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:40,941 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:41,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10239,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,141 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:41,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-07-09 17:24:41,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:41,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729876439] [2021-07-09 17:24:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729876439] [2021-07-09 17:24:41,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729876439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012123397] [2021-07-09 17:24:41,194 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 [2021-07-09 17:24:41,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:41,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012123397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:41,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:41,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9922487] [2021-07-09 17:24:41,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:41,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:41,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:41,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:41,251 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:41,450 INFO L93 Difference]: Finished difference Result 828 states and 2326 transitions. [2021-07-09 17:24:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:41,452 INFO L225 Difference]: With dead ends: 828 [2021-07-09 17:24:41,452 INFO L226 Difference]: Without dead ends: 828 [2021-07-09 17:24:41,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-09 17:24:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-07-09 17:24:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-07-09 17:24:41,459 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-07-09 17:24:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:41,459 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-07-09 17:24:41,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-07-09 17:24:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:41,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:41,460 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:41,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10240,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,676 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:41,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-07-09 17:24:41,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:41,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809708208] [2021-07-09 17:24:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:41,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809708208] [2021-07-09 17:24:41,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809708208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132280629] [2021-07-09 17:24:41,719 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 [2021-07-09 17:24:41,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:41,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:41,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132280629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:41,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:41,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009084549] [2021-07-09 17:24:41,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:41,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:41,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:41,784 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:41,850 INFO L93 Difference]: Finished difference Result 869 states and 2474 transitions. [2021-07-09 17:24:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:41,851 INFO L225 Difference]: With dead ends: 869 [2021-07-09 17:24:41,851 INFO L226 Difference]: Without dead ends: 869 [2021-07-09 17:24:41,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-07-09 17:24:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-07-09 17:24:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-07-09 17:24:41,860 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-07-09 17:24:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:41,860 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-07-09 17:24:41,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-07-09 17:24:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:41,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:41,861 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:42,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10241,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:42,077 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-07-09 17:24:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:42,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393703085] [2021-07-09 17:24:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:42,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393703085] [2021-07-09 17:24:42,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393703085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445991767] [2021-07-09 17:24:42,128 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:42,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445991767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:42,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:42,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451929548] [2021-07-09 17:24:42,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:42,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:42,179 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:42,330 INFO L93 Difference]: Finished difference Result 878 states and 2501 transitions. [2021-07-09 17:24:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:42,332 INFO L225 Difference]: With dead ends: 878 [2021-07-09 17:24:42,332 INFO L226 Difference]: Without dead ends: 876 [2021-07-09 17:24:42,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-07-09 17:24:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-07-09 17:24:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-07-09 17:24:42,341 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-07-09 17:24:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:42,342 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-07-09 17:24:42,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-07-09 17:24:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:42,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:42,343 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:42,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10242 [2021-07-09 17:24:42,543 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-07-09 17:24:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:42,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556260473] [2021-07-09 17:24:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:42,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556260473] [2021-07-09 17:24:42,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556260473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289738372] [2021-07-09 17:24:42,591 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:42,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289738372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:42,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:42,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584132256] [2021-07-09 17:24:42,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:42,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:42,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:42,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:42,640 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:42,774 INFO L93 Difference]: Finished difference Result 876 states and 2523 transitions. [2021-07-09 17:24:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:42,776 INFO L225 Difference]: With dead ends: 876 [2021-07-09 17:24:42,776 INFO L226 Difference]: Without dead ends: 874 [2021-07-09 17:24:42,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-07-09 17:24:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-07-09 17:24:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-07-09 17:24:42,784 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-07-09 17:24:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:42,784 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-07-09 17:24:42,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-07-09 17:24:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:42,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:42,785 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:42,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10243 [2021-07-09 17:24:42,987 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-07-09 17:24:42,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:42,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189021847] [2021-07-09 17:24:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:43,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189021847] [2021-07-09 17:24:43,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189021847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69863057] [2021-07-09 17:24:43,039 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:43,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:43,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:43,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69863057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:43,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:43,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080616383] [2021-07-09 17:24:43,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:43,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:43,090 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:43,156 INFO L93 Difference]: Finished difference Result 868 states and 2462 transitions. [2021-07-09 17:24:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:24:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:43,158 INFO L225 Difference]: With dead ends: 868 [2021-07-09 17:24:43,158 INFO L226 Difference]: Without dead ends: 868 [2021-07-09 17:24:43,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-07-09 17:24:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-07-09 17:24:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-07-09 17:24:43,166 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-07-09 17:24:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:43,166 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-07-09 17:24:43,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-07-09 17:24:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:43,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:43,167 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:43,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10244 [2021-07-09 17:24:43,383 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-07-09 17:24:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:43,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767525770] [2021-07-09 17:24:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:43,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767525770] [2021-07-09 17:24:43,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767525770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766716459] [2021-07-09 17:24:43,423 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:43,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:43,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766716459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:43,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:43,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242923843] [2021-07-09 17:24:43,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:43,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:43,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:43,478 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:43,597 INFO L93 Difference]: Finished difference Result 905 states and 2624 transitions. [2021-07-09 17:24:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:24:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:43,599 INFO L225 Difference]: With dead ends: 905 [2021-07-09 17:24:43,599 INFO L226 Difference]: Without dead ends: 901 [2021-07-09 17:24:43,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-07-09 17:24:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-07-09 17:24:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-07-09 17:24:43,607 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-07-09 17:24:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:43,608 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-07-09 17:24:43,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-07-09 17:24:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:43,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:43,609 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:43,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10245 [2021-07-09 17:24:43,824 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-07-09 17:24:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74400020] [2021-07-09 17:24:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:43,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74400020] [2021-07-09 17:24:43,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74400020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181109927] [2021-07-09 17:24:43,872 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:43,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:43,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181109927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:43,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:43,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941531121] [2021-07-09 17:24:43,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:43,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:43,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:43,924 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:44,022 INFO L93 Difference]: Finished difference Result 858 states and 2461 transitions. [2021-07-09 17:24:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:24:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:44,024 INFO L225 Difference]: With dead ends: 858 [2021-07-09 17:24:44,024 INFO L226 Difference]: Without dead ends: 858 [2021-07-09 17:24:44,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-07-09 17:24:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-07-09 17:24:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-07-09 17:24:44,032 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-07-09 17:24:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:44,032 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-07-09 17:24:44,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-07-09 17:24:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:44,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:44,033 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:44,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10246 [2021-07-09 17:24:44,233 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-07-09 17:24:44,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:44,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668381129] [2021-07-09 17:24:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:44,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668381129] [2021-07-09 17:24:44,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668381129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138620953] [2021-07-09 17:24:44,278 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:44,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:44,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:44,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138620953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:44,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210452248] [2021-07-09 17:24:44,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:44,327 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:44,445 INFO L93 Difference]: Finished difference Result 936 states and 2753 transitions. [2021-07-09 17:24:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:44,446 INFO L225 Difference]: With dead ends: 936 [2021-07-09 17:24:44,446 INFO L226 Difference]: Without dead ends: 930 [2021-07-09 17:24:44,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-09 17:24:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-07-09 17:24:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-07-09 17:24:44,455 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-07-09 17:24:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:44,455 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-07-09 17:24:44,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-07-09 17:24:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:44,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:44,456 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:44,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10247,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:44,672 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-07-09 17:24:44,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:44,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398501470] [2021-07-09 17:24:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:44,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398501470] [2021-07-09 17:24:44,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398501470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199889315] [2021-07-09 17:24:44,721 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:44,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:44,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199889315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:44,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:44,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329513548] [2021-07-09 17:24:44,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:44,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:44,778 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:44,859 INFO L93 Difference]: Finished difference Result 835 states and 2456 transitions. [2021-07-09 17:24:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:44,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:44,861 INFO L225 Difference]: With dead ends: 835 [2021-07-09 17:24:44,861 INFO L226 Difference]: Without dead ends: 835 [2021-07-09 17:24:44,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-07-09 17:24:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-07-09 17:24:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-07-09 17:24:44,870 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-07-09 17:24:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:44,870 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-07-09 17:24:44,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-07-09 17:24:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:44,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:44,871 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:45,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-07-09 17:24:45,088 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:45,088 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-07-09 17:24:45,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:45,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226392294] [2021-07-09 17:24:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:45,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:45,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226392294] [2021-07-09 17:24:45,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226392294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054924071] [2021-07-09 17:24:45,128 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:45,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:45,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:45,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054924071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:45,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:45,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261137579] [2021-07-09 17:24:45,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:45,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:45,178 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:45,291 INFO L93 Difference]: Finished difference Result 914 states and 2697 transitions. [2021-07-09 17:24:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:45,293 INFO L225 Difference]: With dead ends: 914 [2021-07-09 17:24:45,293 INFO L226 Difference]: Without dead ends: 906 [2021-07-09 17:24:45,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:24:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-07-09 17:24:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-07-09 17:24:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-07-09 17:24:45,302 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-07-09 17:24:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:45,302 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-07-09 17:24:45,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-07-09 17:24:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:45,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:45,303 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:45,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10249,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:45,520 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-07-09 17:24:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:45,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014367753] [2021-07-09 17:24:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:45,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:45,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014367753] [2021-07-09 17:24:45,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014367753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664301294] [2021-07-09 17:24:45,570 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:45,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:45,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:45,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664301294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:45,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:45,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422281369] [2021-07-09 17:24:45,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:45,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:45,626 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:45,696 INFO L93 Difference]: Finished difference Result 812 states and 2469 transitions. [2021-07-09 17:24:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:24:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:45,698 INFO L225 Difference]: With dead ends: 812 [2021-07-09 17:24:45,698 INFO L226 Difference]: Without dead ends: 812 [2021-07-09 17:24:45,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-09 17:24:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-07-09 17:24:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-07-09 17:24:45,707 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-07-09 17:24:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:45,707 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-07-09 17:24:45,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-07-09 17:24:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:45,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:45,708 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:45,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:45,909 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-07-09 17:24:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:45,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011678758] [2021-07-09 17:24:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:45,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:45,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011678758] [2021-07-09 17:24:45,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011678758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150237669] [2021-07-09 17:24:45,975 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:46,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:46,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150237669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:46,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:46,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786908379] [2021-07-09 17:24:46,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:46,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:46,030 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:46,132 INFO L93 Difference]: Finished difference Result 930 states and 2762 transitions. [2021-07-09 17:24:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:46,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:46,133 INFO L225 Difference]: With dead ends: 930 [2021-07-09 17:24:46,133 INFO L226 Difference]: Without dead ends: 920 [2021-07-09 17:24:46,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-09 17:24:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-07-09 17:24:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-07-09 17:24:46,143 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-07-09 17:24:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:46,143 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-07-09 17:24:46,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-07-09 17:24:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:46,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:46,144 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:46,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:46,360 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-07-09 17:24:46,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:46,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476337942] [2021-07-09 17:24:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:46,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476337942] [2021-07-09 17:24:46,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476337942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335581479] [2021-07-09 17:24:46,404 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:46,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:46,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:46,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335581479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:46,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:46,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685794815] [2021-07-09 17:24:46,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:46,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:46,460 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:46,566 INFO L93 Difference]: Finished difference Result 870 states and 2608 transitions. [2021-07-09 17:24:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:46,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:46,568 INFO L225 Difference]: With dead ends: 870 [2021-07-09 17:24:46,568 INFO L226 Difference]: Without dead ends: 870 [2021-07-09 17:24:46,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-07-09 17:24:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-07-09 17:24:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-07-09 17:24:46,577 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-07-09 17:24:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:46,577 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-07-09 17:24:46,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-07-09 17:24:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:46,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:46,578 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:46,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:46,794 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-07-09 17:24:46,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:46,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474169506] [2021-07-09 17:24:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:46,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474169506] [2021-07-09 17:24:46,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474169506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887302882] [2021-07-09 17:24:46,834 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:46,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:46,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887302882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:46,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:46,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145217912] [2021-07-09 17:24:46,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:46,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:46,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:46,888 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:46,945 INFO L93 Difference]: Finished difference Result 853 states and 2620 transitions. [2021-07-09 17:24:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:46,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:46,947 INFO L225 Difference]: With dead ends: 853 [2021-07-09 17:24:46,947 INFO L226 Difference]: Without dead ends: 841 [2021-07-09 17:24:46,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-07-09 17:24:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-07-09 17:24:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-07-09 17:24:46,955 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-07-09 17:24:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:46,955 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-07-09 17:24:46,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-07-09 17:24:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:46,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:46,956 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:47,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10253,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:47,169 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-07-09 17:24:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225439976] [2021-07-09 17:24:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:47,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225439976] [2021-07-09 17:24:47,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225439976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511913894] [2021-07-09 17:24:47,214 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:47,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:47,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511913894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:47,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:47,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075313749] [2021-07-09 17:24:47,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:47,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:47,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:47,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:47,280 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:47,405 INFO L93 Difference]: Finished difference Result 875 states and 2625 transitions. [2021-07-09 17:24:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:47,407 INFO L225 Difference]: With dead ends: 875 [2021-07-09 17:24:47,407 INFO L226 Difference]: Without dead ends: 875 [2021-07-09 17:24:47,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-09 17:24:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-07-09 17:24:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-07-09 17:24:47,416 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-07-09 17:24:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:47,416 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-07-09 17:24:47,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-07-09 17:24:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:47,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:47,417 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:47,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-07-09 17:24:47,633 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:47,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-07-09 17:24:47,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:47,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570762714] [2021-07-09 17:24:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:47,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570762714] [2021-07-09 17:24:47,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570762714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280160316] [2021-07-09 17:24:47,675 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:47,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:47,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280160316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:47,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298434870] [2021-07-09 17:24:47,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:47,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:47,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:47,725 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:47,780 INFO L93 Difference]: Finished difference Result 848 states and 2607 transitions. [2021-07-09 17:24:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:47,782 INFO L225 Difference]: With dead ends: 848 [2021-07-09 17:24:47,782 INFO L226 Difference]: Without dead ends: 834 [2021-07-09 17:24:47,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-07-09 17:24:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-07-09 17:24:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-07-09 17:24:47,790 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-07-09 17:24:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:47,790 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-07-09 17:24:47,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-07-09 17:24:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:47,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:47,791 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:48,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10255 [2021-07-09 17:24:48,007 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-07-09 17:24:48,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:48,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266311293] [2021-07-09 17:24:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266311293] [2021-07-09 17:24:48,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266311293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5668079] [2021-07-09 17:24:48,054 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:48,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:48,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:48,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5668079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:48,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:48,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255750818] [2021-07-09 17:24:48,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:48,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:48,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:48,118 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:48,249 INFO L93 Difference]: Finished difference Result 921 states and 2738 transitions. [2021-07-09 17:24:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:48,251 INFO L225 Difference]: With dead ends: 921 [2021-07-09 17:24:48,251 INFO L226 Difference]: Without dead ends: 921 [2021-07-09 17:24:48,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-07-09 17:24:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-07-09 17:24:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-07-09 17:24:48,260 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-07-09 17:24:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:48,261 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-07-09 17:24:48,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-07-09 17:24:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:48,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:48,262 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:48,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10256 [2021-07-09 17:24:48,478 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:48,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-07-09 17:24:48,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:48,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807583844] [2021-07-09 17:24:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807583844] [2021-07-09 17:24:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807583844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118167803] [2021-07-09 17:24:48,524 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:48,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118167803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:48,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681336550] [2021-07-09 17:24:48,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:48,581 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:48,628 INFO L93 Difference]: Finished difference Result 846 states and 2603 transitions. [2021-07-09 17:24:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:24:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:48,629 INFO L225 Difference]: With dead ends: 846 [2021-07-09 17:24:48,629 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 17:24:48,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 17:24:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-07-09 17:24:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-07-09 17:24:48,643 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-07-09 17:24:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:48,643 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-07-09 17:24:48,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-07-09 17:24:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:48,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:48,644 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:48,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10257 [2021-07-09 17:24:48,860 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-07-09 17:24:48,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:48,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919492247] [2021-07-09 17:24:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:48,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919492247] [2021-07-09 17:24:48,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919492247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073744524] [2021-07-09 17:24:48,923 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:48,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073744524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:48,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:48,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383589728] [2021-07-09 17:24:48,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:48,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:48,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:48,983 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:49,152 INFO L93 Difference]: Finished difference Result 1025 states and 3016 transitions. [2021-07-09 17:24:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:49,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:49,153 INFO L225 Difference]: With dead ends: 1025 [2021-07-09 17:24:49,153 INFO L226 Difference]: Without dead ends: 1025 [2021-07-09 17:24:49,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-09 17:24:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-07-09 17:24:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-07-09 17:24:49,163 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-07-09 17:24:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:49,164 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-07-09 17:24:49,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-07-09 17:24:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:49,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:49,165 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:49,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10258 [2021-07-09 17:24:49,365 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-07-09 17:24:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:49,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091869822] [2021-07-09 17:24:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:49,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:49,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091869822] [2021-07-09 17:24:49,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091869822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:49,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288073472] [2021-07-09 17:24:49,497 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:49,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:49,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:49,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:24:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:49,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:24:50,503 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 262 [2021-07-09 17:24:51,632 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 332 [2021-07-09 17:24:51,872 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 394 [2021-07-09 17:24:52,162 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-07-09 17:24:52,464 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-07-09 17:24:52,791 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 389 [2021-07-09 17:24:53,035 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 359 [2021-07-09 17:24:53,193 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 251 [2021-07-09 17:24:53,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:53,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:53,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:53,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:24:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:53,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288073472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:53,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:53,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:24:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881861003] [2021-07-09 17:24:53,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:24:53,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:24:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:53,767 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-07-09 17:24:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:54,152 INFO L93 Difference]: Finished difference Result 853 states and 2629 transitions. [2021-07-09 17:24:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20 [2021-07-09 17:24:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:54,153 INFO L225 Difference]: With dead ends: 853 [2021-07-09 17:24:54,153 INFO L226 Difference]: Without dead ends: 826 [2021-07-09 17:24:54,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-07-09 17:24:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-07-09 17:24:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-07-09 17:24:54,163 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-07-09 17:24:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:54,163 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-07-09 17:24:54,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-07-09 17:24:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-07-09 17:24:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:54,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:54,164 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:54,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10259,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:54,380 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:54,380 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-07-09 17:24:54,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:54,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766665323] [2021-07-09 17:24:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:54,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:54,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766665323] [2021-07-09 17:24:54,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766665323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:54,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481593008] [2021-07-09 17:24:54,474 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:54,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:54,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:54,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:24:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:54,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:54,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:24:55,645 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 353 [2021-07-09 17:24:57,098 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-07-09 17:24:57,333 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-07-09 17:24:57,551 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 356 [2021-07-09 17:24:57,765 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-07-09 17:24:58,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:58,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:58,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:58,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:24:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:58,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481593008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:58,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:58,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:24:58,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459226856] [2021-07-09 17:24:58,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:24:58,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:24:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:58,572 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:24:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:58,935 INFO L93 Difference]: Finished difference Result 877 states and 2701 transitions. [2021-07-09 17:24:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:24:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:58,937 INFO L225 Difference]: With dead ends: 877 [2021-07-09 17:24:58,937 INFO L226 Difference]: Without dead ends: 861 [2021-07-09 17:24:58,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-07-09 17:24:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-07-09 17:24:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 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) [2021-07-09 17:24:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-07-09 17:24:58,948 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-07-09 17:24:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:58,948 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-07-09 17:24:58,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:24:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-07-09 17:24:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:58,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:58,949 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:59,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10557 [2021-07-09 17:24:59,165 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:59,165 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-07-09 17:24:59,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:59,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38342251] [2021-07-09 17:24:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38342251] [2021-07-09 17:24:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38342251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706284281] [2021-07-09 17:24:59,273 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:59,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:24:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:00,015 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-07-09 17:25:00,155 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:00,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:00,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:25:00,620 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 188 [2021-07-09 17:25:01,321 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 237 [2021-07-09 17:25:01,508 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-07-09 17:25:01,697 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-07-09 17:25:01,965 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 313 [2021-07-09 17:25:02,155 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 274 [2021-07-09 17:25:02,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:03,274 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:25:03,275 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:25:03,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:25:04,365 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 241 [2021-07-09 17:25:04,526 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 264 [2021-07-09 17:25:05,285 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-07-09 17:25:05,600 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-07-09 17:25:05,978 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 364 [2021-07-09 17:25:06,158 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 245 [2021-07-09 17:25:06,314 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 248 [2021-07-09 17:25:07,061 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 214 [2021-07-09 17:25:07,188 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 225 [2021-07-09 17:25:07,348 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-07-09 17:25:07,505 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-07-09 17:25:07,685 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 240 [2021-07-09 17:25:07,860 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 248 [2021-07-09 17:25:08,747 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 176 [2021-07-09 17:25:09,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:09,690 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:25:09,690 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:25:09,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:25:10,313 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 263 [2021-07-09 17:25:11,349 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 267 [2021-07-09 17:25:11,531 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 283 [2021-07-09 17:25:11,701 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 296 [2021-07-09 17:25:12,912 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 314 [2021-07-09 17:25:13,108 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 339 [2021-07-09 17:25:13,532 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 513 [2021-07-09 17:25:14,046 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-07-09 17:25:14,572 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-07-09 17:25:15,211 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 543 [2021-07-09 17:25:15,670 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 456 [2021-07-09 17:25:16,091 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 292 [2021-07-09 17:25:16,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:17,102 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:25:17,103 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:25:17,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:25:17,643 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 214 [2021-07-09 17:25:18,948 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-07-09 17:25:19,101 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-07-09 17:25:19,298 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 253 [2021-07-09 17:25:20,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:20,095 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:25:20,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:20,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:25:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:20,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706284281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:20,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:25:20,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718955542] [2021-07-09 17:25:20,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:25:20,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:25:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:25:20,123 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:25:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:20,552 INFO L93 Difference]: Finished difference Result 901 states and 2754 transitions. [2021-07-09 17:25:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:25:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:20,554 INFO L225 Difference]: With dead ends: 901 [2021-07-09 17:25:20,554 INFO L226 Difference]: Without dead ends: 891 [2021-07-09 17:25:20,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-07-09 17:25:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-07-09 17:25:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 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) [2021-07-09 17:25:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-07-09 17:25:20,566 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-07-09 17:25:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:20,566 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-07-09 17:25:20,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:25:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-07-09 17:25:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:20,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:20,567 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:20,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10960,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:20,781 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-07-09 17:25:20,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:20,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789135233] [2021-07-09 17:25:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:20,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:20,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789135233] [2021-07-09 17:25:20,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789135233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48921095] [2021-07-09 17:25:20,893 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:20,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:20,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:20,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:25:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:21,345 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:21,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:21,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:25:22,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:22,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:22,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:22,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:25:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:22,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48921095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:22,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:22,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:25:22,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319003747] [2021-07-09 17:25:22,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:25:22,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:25:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:25:22,773 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:25:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:23,256 INFO L93 Difference]: Finished difference Result 938 states and 2953 transitions. [2021-07-09 17:25:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:25:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:25:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:23,258 INFO L225 Difference]: With dead ends: 938 [2021-07-09 17:25:23,258 INFO L226 Difference]: Without dead ends: 922 [2021-07-09 17:25:23,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-07-09 17:25:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-07-09 17:25:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-07-09 17:25:23,269 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-07-09 17:25:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:23,269 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-07-09 17:25:23,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:25:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-07-09 17:25:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:23,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:23,271 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:23,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12509,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:23,487 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-07-09 17:25:23,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:23,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784251279] [2021-07-09 17:25:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:23,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:23,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784251279] [2021-07-09 17:25:23,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784251279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:23,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410228051] [2021-07-09 17:25:23,598 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:23,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:25:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:23,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:25:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:23,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:23,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:25:24,595 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 251 [2021-07-09 17:25:24,698 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 251 [2021-07-09 17:25:24,821 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 262 [2021-07-09 17:25:25,113 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 358 [2021-07-09 17:25:25,366 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 318 [2021-07-09 17:25:25,642 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 183 [2021-07-09 17:25:26,551 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 202 [2021-07-09 17:25:26,657 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 213 [2021-07-09 17:25:26,806 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 158 [2021-07-09 17:25:27,409 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-07-09 17:25:27,633 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-07-09 17:25:27,889 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 268 [2021-07-09 17:25:28,018 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 231 [2021-07-09 17:25:28,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:28,979 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:25:28,979 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:25:28,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:25:29,509 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 212 [2021-07-09 17:25:30,616 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 212 [2021-07-09 17:25:30,847 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 224 [2021-07-09 17:25:31,109 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 239 [2021-07-09 17:25:32,069 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 221 [2021-07-09 17:25:32,278 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 231 [2021-07-09 17:25:32,525 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 252 [2021-07-09 17:25:32,803 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 262 [2021-07-09 17:25:33,388 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 329 [2021-07-09 17:25:34,043 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 348 [2021-07-09 17:25:35,167 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 185 [2021-07-09 17:25:35,340 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 234 [2021-07-09 17:25:35,589 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 249 [2021-07-09 17:25:35,898 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 259 [2021-07-09 17:25:36,179 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 272 [2021-07-09 17:25:36,911 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 206 [2021-07-09 17:25:37,033 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 214 [2021-07-09 17:25:37,206 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 241 [2021-07-09 17:25:37,390 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 251 [2021-07-09 17:25:37,627 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 294 [2021-07-09 17:25:38,214 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 359 [2021-07-09 17:25:38,942 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 398 [2021-07-09 17:25:39,717 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 399 [2021-07-09 17:25:41,321 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 965 DAG size of output: 559 [2021-07-09 17:25:43,176 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-07-09 17:25:45,021 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-07-09 17:25:46,956 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 1039 DAG size of output: 578 [2021-07-09 17:25:48,282 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 580 DAG size of output: 594 [2021-07-09 17:25:49,497 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 573 DAG size of output: 578 [2021-07-09 17:25:50,897 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 567 DAG size of output: 601 [2021-07-09 17:25:52,371 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 562 DAG size of output: 494 [2021-07-09 17:25:52,503 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 443 [2021-07-09 17:25:52,693 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 409 [2021-07-09 17:25:53,622 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 210 [2021-07-09 17:25:53,745 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 216 [2021-07-09 17:25:53,898 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 235 [2021-07-09 17:25:54,092 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 265 [2021-07-09 17:25:54,327 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 299 [2021-07-09 17:25:54,718 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 359 [2021-07-09 17:25:55,214 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 376 [2021-07-09 17:25:55,825 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-07-09 17:25:56,424 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-07-09 17:25:57,126 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 426 [2021-07-09 17:25:58,170 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 428 DAG size of output: 651 [2021-07-09 17:25:58,850 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 343 [2021-07-09 17:25:59,269 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 284 [2021-07-09 17:25:59,654 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 351 [2021-07-09 17:26:00,650 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 272 [2021-07-09 17:26:00,860 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 286 [2021-07-09 17:26:01,152 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 392 [2021-07-09 17:26:01,798 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 453 [2021-07-09 17:26:02,512 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 323 [2021-07-09 17:26:03,432 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 259 [2021-07-09 17:26:03,593 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 270 [2021-07-09 17:26:03,775 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 273 [2021-07-09 17:26:04,112 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 313 [2021-07-09 17:26:04,534 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 382 [2021-07-09 17:26:04,975 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 444 [2021-07-09 17:26:05,822 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-07-09 17:26:06,665 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-07-09 17:26:07,630 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 1028 DAG size of output: 677 [2021-07-09 17:26:07,883 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 258 [2021-07-09 17:26:08,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:08,870 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:26:08,871 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:26:08,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:26:10,084 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-07-09 17:26:10,289 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-07-09 17:26:10,545 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 416 [2021-07-09 17:26:10,868 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 522 [2021-07-09 17:26:11,262 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 518 [2021-07-09 17:26:11,611 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 479 [2021-07-09 17:26:11,933 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 485 [2021-07-09 17:26:12,181 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 350 [2021-07-09 17:26:12,971 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 347 [2021-07-09 17:26:13,329 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 416 [2021-07-09 17:26:13,520 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2021-07-09 17:26:14,407 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-07-09 17:26:14,941 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 576 [2021-07-09 17:26:15,739 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 969 DAG size of output: 660 [2021-07-09 17:26:15,949 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 352 [2021-07-09 17:26:16,107 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 303 [2021-07-09 17:26:16,532 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 279 [2021-07-09 17:26:16,666 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 248 [2021-07-09 17:26:17,267 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 390 [2021-07-09 17:26:17,411 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 249 [2021-07-09 17:26:17,536 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 227 [2021-07-09 17:26:17,908 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 241 [2021-07-09 17:26:18,568 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 334 [2021-07-09 17:26:19,087 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 554 [2021-07-09 17:26:20,170 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1305 DAG size of output: 734 [2021-07-09 17:26:21,553 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-07-09 17:26:22,935 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-07-09 17:26:24,630 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1487 DAG size of output: 829 [2021-07-09 17:26:26,383 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 831 DAG size of output: 1033 [2021-07-09 17:26:28,203 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 779 DAG size of output: 893 [2021-07-09 17:26:28,965 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 555 [2021-07-09 17:26:29,808 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 258 [2021-07-09 17:26:30,055 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 326 [2021-07-09 17:26:30,697 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 161 [2021-07-09 17:26:30,846 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 239 [2021-07-09 17:26:31,169 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 408 [2021-07-09 17:26:31,316 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 573 [2021-07-09 17:26:32,021 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 526 [2021-07-09 17:26:32,163 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 219 [2021-07-09 17:26:32,644 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 251 [2021-07-09 17:26:33,111 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 314 [2021-07-09 17:26:33,225 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 207 [2021-07-09 17:26:33,913 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 411 [2021-07-09 17:26:34,261 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 448 [2021-07-09 17:26:34,973 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 720 [2021-07-09 17:26:35,972 WARN L205 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 619 [2021-07-09 17:26:36,551 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 481 [2021-07-09 17:26:36,730 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 242 [2021-07-09 17:26:37,377 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 246 [2021-07-09 17:26:37,996 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 261 [2021-07-09 17:26:38,222 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 295 [2021-07-09 17:26:38,608 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 359 [2021-07-09 17:26:39,611 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 264 [2021-07-09 17:26:39,773 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 269 [2021-07-09 17:26:40,169 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 449 [2021-07-09 17:26:41,360 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-07-09 17:26:42,562 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-07-09 17:26:43,936 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1612 DAG size of output: 912 [2021-07-09 17:26:44,808 WARN L205 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 718 [2021-07-09 17:26:45,134 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 242 [2021-07-09 17:26:45,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:45,905 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:26:45,905 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:26:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:26:46,978 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-07-09 17:26:47,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:47,489 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:26:47,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:47,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:26:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:47,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410228051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:47,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:47,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:26:47,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136883380] [2021-07-09 17:26:47,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:26:47,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:47,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:26:47,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:47,517 INFO L87 Difference]: Start difference. First operand 871 states and 2816 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:26:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:48,006 INFO L93 Difference]: Finished difference Result 978 states and 3027 transitions. [2021-07-09 17:26:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:26:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:26:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:48,008 INFO L225 Difference]: With dead ends: 978 [2021-07-09 17:26:48,008 INFO L226 Difference]: Without dead ends: 959 [2021-07-09 17:26:48,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:26:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-07-09 17:26:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 869. [2021-07-09 17:26:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.224654377880184) internal successors, (2799), 868 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2799 transitions. [2021-07-09 17:26:48,019 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2799 transitions. Word has length 20 [2021-07-09 17:26:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:48,019 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2799 transitions. [2021-07-09 17:26:48,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:26:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2799 transitions. [2021-07-09 17:26:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:26:48,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:48,020 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:48,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12726,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:48,236 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1005428375, now seen corresponding path program 202 times [2021-07-09 17:26:48,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:48,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630211090] [2021-07-09 17:26:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:48,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:48,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630211090] [2021-07-09 17:26:48,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630211090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:48,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821562886] [2021-07-09 17:26:48,333 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:48,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:48,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:48,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:26:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:48,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:48,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:26:49,547 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 249 [2021-07-09 17:26:49,691 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 202 [2021-07-09 17:26:49,971 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 238 [2021-07-09 17:26:50,789 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 221 [2021-07-09 17:26:50,920 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-07-09 17:26:51,076 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-07-09 17:26:51,223 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 237 [2021-07-09 17:26:51,344 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 239 [2021-07-09 17:26:51,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,173 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:26:52,174 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:26:52,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:26:52,919 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 255 [2021-07-09 17:26:53,104 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 299 [2021-07-09 17:26:54,120 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 315 [2021-07-09 17:26:54,313 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-07-09 17:26:54,528 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-07-09 17:26:54,749 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 337 [2021-07-09 17:26:55,101 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 399 [2021-07-09 17:26:55,470 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 308 [2021-07-09 17:26:55,768 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 310 [2021-07-09 17:26:56,759 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 265 [2021-07-09 17:26:58,278 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 291 [2021-07-09 17:26:58,914 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 434 [2021-07-09 17:26:59,627 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 577 [2021-07-09 17:27:00,370 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 578 [2021-07-09 17:27:01,240 WARN L205 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 653 [2021-07-09 17:27:01,409 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 266 [2021-07-09 17:27:02,355 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 228 [2021-07-09 17:27:02,535 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 247 [2021-07-09 17:27:03,489 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 233 [2021-07-09 17:27:03,937 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 301 [2021-07-09 17:27:04,826 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 458 [2021-07-09 17:27:05,441 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 463 [2021-07-09 17:27:06,205 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 569 [2021-07-09 17:27:07,959 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-07-09 17:27:09,712 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-07-09 17:27:11,538 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1200 DAG size of output: 859 [2021-07-09 17:27:12,886 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 861 DAG size of output: 700 [2021-07-09 17:27:13,836 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 590 [2021-07-09 17:27:14,388 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 672 [2021-07-09 17:27:15,342 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 215 [2021-07-09 17:27:15,519 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-07-09 17:27:15,695 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-07-09 17:27:15,883 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 234 [2021-07-09 17:27:16,050 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 255 [2021-07-09 17:27:16,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:17,104 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:27:17,104 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:27:17,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:27:17,661 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 253 [2021-07-09 17:27:19,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:19,569 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:19,569 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:19,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:20,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,760 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:27:20,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,760 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:27:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821562886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:20,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:27:20,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050676794] [2021-07-09 17:27:20,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:27:20,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:20,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:27:20,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:20,788 INFO L87 Difference]: Start difference. First operand 869 states and 2799 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:27:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:21,292 INFO L93 Difference]: Finished difference Result 942 states and 2954 transitions. [2021-07-09 17:27:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:27:21,292 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:27:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:21,294 INFO L225 Difference]: With dead ends: 942 [2021-07-09 17:27:21,294 INFO L226 Difference]: Without dead ends: 932 [2021-07-09 17:27:21,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:27:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-07-09 17:27:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 872. [2021-07-09 17:27:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2238805970149254) internal successors, (2808), 871 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2808 transitions. [2021-07-09 17:27:21,305 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2808 transitions. Word has length 20 [2021-07-09 17:27:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:21,305 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2808 transitions. [2021-07-09 17:27:21,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:27:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2808 transitions. [2021-07-09 17:27:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:27:21,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:21,306 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:21,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15864 [2021-07-09 17:27:21,523 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:21,523 INFO L82 PathProgramCache]: Analyzing trace with hash 990820585, now seen corresponding path program 203 times [2021-07-09 17:27:21,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:21,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085891513] [2021-07-09 17:27:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:21,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:21,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085891513] [2021-07-09 17:27:21,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085891513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058285153] [2021-07-09 17:27:21,625 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:21,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:27:21,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:27:21,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:22,134 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:22,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:23,112 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 475 [2021-07-09 17:27:23,323 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-07-09 17:27:23,533 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-07-09 17:27:23,802 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 496 [2021-07-09 17:27:24,109 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 658 [2021-07-09 17:27:24,242 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 446 [2021-07-09 17:27:25,076 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-07-09 17:27:25,245 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-07-09 17:27:25,487 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 318 [2021-07-09 17:27:25,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:3 [2021-07-09 17:27:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058285153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:25,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:25,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:27:25,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770359060] [2021-07-09 17:27:25,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:27:25,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:25,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:27:25,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:25,933 INFO L87 Difference]: Start difference. First operand 872 states and 2808 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:27:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:26,473 INFO L93 Difference]: Finished difference Result 1010 states and 3206 transitions. [2021-07-09 17:27:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:27:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:27:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:26,475 INFO L225 Difference]: With dead ends: 1010 [2021-07-09 17:27:26,475 INFO L226 Difference]: Without dead ends: 994 [2021-07-09 17:27:26,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:27:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-09 17:27:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 941. [2021-07-09 17:27:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.2542553191489363) internal successors, (3059), 940 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3059 transitions. [2021-07-09 17:27:26,486 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3059 transitions. Word has length 20 [2021-07-09 17:27:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:26,487 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3059 transitions. [2021-07-09 17:27:26,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:27:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3059 transitions. [2021-07-09 17:27:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:27:26,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:26,488 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:26,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18783 [2021-07-09 17:27:26,688 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695115, now seen corresponding path program 204 times [2021-07-09 17:27:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:26,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766190654] [2021-07-09 17:27:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:26,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:26,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766190654] [2021-07-09 17:27:26,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766190654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:26,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076857648] [2021-07-09 17:27:26,797 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:26,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:27:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:26,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:27,196 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:27,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:28,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,168 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:27:29,169 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:27:29,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:27:29,807 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 259 [2021-07-09 17:27:29,909 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 279 [2021-07-09 17:27:31,048 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 375 [2021-07-09 17:27:31,306 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-07-09 17:27:31,587 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-07-09 17:27:31,868 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 394 [2021-07-09 17:27:32,158 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 391 [2021-07-09 17:27:32,309 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 302 [2021-07-09 17:27:32,522 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 266 [2021-07-09 17:27:32,694 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 271 [2021-07-09 17:27:33,320 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 249 [2021-07-09 17:27:33,445 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 259 [2021-07-09 17:27:34,035 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 331 [2021-07-09 17:27:35,014 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 258 [2021-07-09 17:27:35,210 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 280 [2021-07-09 17:27:35,571 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 299 [2021-07-09 17:27:35,999 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 478 [2021-07-09 17:27:36,501 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 504 [2021-07-09 17:27:37,166 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-07-09 17:27:37,822 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-07-09 17:27:38,533 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 809 DAG size of output: 559 [2021-07-09 17:27:39,113 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 561 [2021-07-09 17:27:40,180 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 465 [2021-07-09 17:27:40,926 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 355 [2021-07-09 17:27:41,186 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 370 [2021-07-09 17:27:41,477 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-07-09 17:27:41,725 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-07-09 17:27:42,029 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-07-09 17:27:42,534 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 291 [2021-07-09 17:27:43,122 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 229 [2021-07-09 17:27:43,229 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 240 [2021-07-09 17:27:43,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:43,956 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:27:43,956 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:27:43,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:27:46,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:46,374 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:46,374 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:46,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:47,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:47,692 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:27:47,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:47,692 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:27:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:47,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076857648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:47,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:47,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:27:47,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361669974] [2021-07-09 17:27:47,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:27:47,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:47,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:27:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:47,720 INFO L87 Difference]: Start difference. First operand 941 states and 3059 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:27:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:48,391 INFO L93 Difference]: Finished difference Result 1081 states and 3355 transitions. [2021-07-09 17:27:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:27:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:27:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:48,393 INFO L225 Difference]: With dead ends: 1081 [2021-07-09 17:27:48,393 INFO L226 Difference]: Without dead ends: 1055 [2021-07-09 17:27:48,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:27:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-07-09 17:27:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 947. [2021-07-09 17:27:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.251585623678647) internal successors, (3076), 946 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3076 transitions. [2021-07-09 17:27:48,405 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3076 transitions. Word has length 20 [2021-07-09 17:27:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:48,405 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3076 transitions. [2021-07-09 17:27:48,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:27:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3076 transitions. [2021-07-09 17:27:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:27:48,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:48,406 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:48,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19257,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:48,622 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:48,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:48,623 INFO L82 PathProgramCache]: Analyzing trace with hash -734658873, now seen corresponding path program 205 times [2021-07-09 17:27:48,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:48,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933321959] [2021-07-09 17:27:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:48,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:48,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933321959] [2021-07-09 17:27:48,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933321959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:48,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810811764] [2021-07-09 17:27:48,728 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:48,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:48,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:49,085 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 49 [2021-07-09 17:27:49,255 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:49,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:49,744 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 246 [2021-07-09 17:27:49,945 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 256 [2021-07-09 17:27:50,830 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-07-09 17:27:50,959 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-07-09 17:27:51,108 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 262 [2021-07-09 17:27:51,274 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 253 [2021-07-09 17:27:51,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,155 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:27:52,155 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:27:52,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:27:53,285 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 315 [2021-07-09 17:27:53,477 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-07-09 17:27:53,667 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-07-09 17:27:53,918 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 341 [2021-07-09 17:27:54,369 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 439 [2021-07-09 17:27:54,793 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 423 [2021-07-09 17:27:55,014 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 343 [2021-07-09 17:27:55,179 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 295 [2021-07-09 17:27:55,295 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 255 [2021-07-09 17:27:56,817 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 231 [2021-07-09 17:27:57,065 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 291 [2021-07-09 17:27:57,347 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 320 [2021-07-09 17:27:57,739 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 374 [2021-07-09 17:27:58,218 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 417 [2021-07-09 17:27:58,438 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 294 [2021-07-09 17:27:59,246 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 196 [2021-07-09 17:27:59,545 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 242 [2021-07-09 17:28:00,268 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 220 [2021-07-09 17:28:00,540 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 330 [2021-07-09 17:28:00,932 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 402 [2021-07-09 17:28:01,395 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 432 [2021-07-09 17:28:02,019 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 646 DAG size of output: 497 [2021-07-09 17:28:03,257 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 924 DAG size of output: 729 [2021-07-09 17:28:04,819 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1058 DAG size of output: 857 [2021-07-09 17:28:05,198 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 348 [2021-07-09 17:28:05,390 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 302 [2021-07-09 17:28:05,574 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 265 [2021-07-09 17:28:05,680 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 228 [2021-07-09 17:28:06,394 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2021-07-09 17:28:06,548 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 239 [2021-07-09 17:28:07,411 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 298 [2021-07-09 17:28:07,736 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 349 [2021-07-09 17:28:07,962 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 298 [2021-07-09 17:28:08,102 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 248 [2021-07-09 17:28:08,242 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 233 [2021-07-09 17:28:09,211 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 262 [2021-07-09 17:28:10,176 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 226 [2021-07-09 17:28:10,364 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 280 [2021-07-09 17:28:10,572 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 287 [2021-07-09 17:28:10,989 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 406 [2021-07-09 17:28:11,575 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 482 [2021-07-09 17:28:12,638 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 841 DAG size of output: 671 [2021-07-09 17:28:14,014 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 981 DAG size of output: 787 [2021-07-09 17:28:17,370 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1383 [2021-07-09 17:28:17,891 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 426 [2021-07-09 17:28:18,129 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 351 [2021-07-09 17:28:18,325 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 304 [2021-07-09 17:28:18,453 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 264 [2021-07-09 17:28:19,395 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 222 [2021-07-09 17:28:19,552 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 245 [2021-07-09 17:28:20,280 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 219 [2021-07-09 17:28:20,415 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 250 [2021-07-09 17:28:20,596 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 257 [2021-07-09 17:28:20,956 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 344 [2021-07-09 17:28:21,424 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 390 [2021-07-09 17:28:21,644 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 300 [2021-07-09 17:28:21,771 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 250 [2021-07-09 17:28:22,645 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 243 [2021-07-09 17:28:22,831 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 262 [2021-07-09 17:28:23,061 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 330 [2021-07-09 17:28:23,170 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 266 [2021-07-09 17:28:23,318 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 262 [2021-07-09 17:28:24,370 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 245 [2021-07-09 17:28:24,592 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 310 [2021-07-09 17:28:24,922 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 389 [2021-07-09 17:28:25,529 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 540 [2021-07-09 17:28:26,339 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 622 [2021-07-09 17:28:27,794 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1030 DAG size of output: 835 [2021-07-09 17:28:29,623 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1173 DAG size of output: 953 [2021-07-09 17:28:29,866 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 346 [2021-07-09 17:28:30,030 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 297 [2021-07-09 17:28:30,650 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 219 [2021-07-09 17:28:30,785 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 256 [2021-07-09 17:28:30,968 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 289 [2021-07-09 17:28:31,668 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 262 [2021-07-09 17:28:32,263 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-07-09 17:28:32,537 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 378 [2021-07-09 17:28:32,954 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 410 [2021-07-09 17:28:33,603 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 560 [2021-07-09 17:28:34,455 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 595 [2021-07-09 17:28:34,595 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 254 [2021-07-09 17:28:35,461 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 233 [2021-07-09 17:28:36,292 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 319 [2021-07-09 17:28:36,624 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 373 [2021-07-09 17:28:37,014 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 401 [2021-07-09 17:28:37,518 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 439 [2021-07-09 17:28:38,962 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1076 DAG size of output: 887 [2021-07-09 17:28:40,775 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 1212 DAG size of output: 1004 [2021-07-09 17:28:44,974 WARN L205 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 1979 DAG size of output: 1641 [2021-07-09 17:28:53,654 WARN L205 SmtUtils]: Spent 8.67 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-07-09 17:29:02,286 WARN L205 SmtUtils]: Spent 8.62 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-07-09 17:29:12,581 WARN L205 SmtUtils]: Spent 10.28 s on a formula simplification. DAG size of input: 3202 DAG size of output: 2270 [2021-07-09 17:29:30,228 WARN L205 SmtUtils]: Spent 17.63 s on a formula simplification. DAG size of input: 2272 DAG size of output: 2759 [2021-07-09 17:29:31,848 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 1300 DAG size of output: 1279 [2021-07-09 17:29:35,138 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 829 DAG size of output: 1038 [2021-07-09 17:29:36,264 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 566 DAG size of output: 530 [2021-07-09 17:29:36,600 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 399 [2021-07-09 17:29:37,432 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 252 [2021-07-09 17:29:37,749 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 245 [2021-07-09 17:29:38,612 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 213 [2021-07-09 17:29:38,829 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 263 [2021-07-09 17:29:39,086 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 282 [2021-07-09 17:29:39,620 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 350 [2021-07-09 17:29:40,616 WARN L205 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 1044 DAG size of output: 557 [2021-07-09 17:29:40,945 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 521 [2021-07-09 17:29:41,606 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 459 [2021-07-09 17:29:41,976 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 269 [2021-07-09 17:29:42,214 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 303 [2021-07-09 17:29:42,441 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 275 [2021-07-09 17:29:42,753 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 218 [2021-07-09 17:29:43,104 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 397 [2021-07-09 17:29:44,635 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1554 DAG size of output: 803 [2021-07-09 17:29:50,078 WARN L205 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-07-09 17:29:55,520 WARN L205 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-07-09 17:30:01,259 WARN L205 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 3039 DAG size of output: 1662 [2021-07-09 17:30:01,741 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1662 [2021-07-09 17:30:01,904 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 781 [2021-07-09 17:30:02,197 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 298 [2021-07-09 17:30:03,673 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 188 [2021-07-09 17:30:03,819 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 207 [2021-07-09 17:30:04,161 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 251 [2021-07-09 17:30:04,489 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 375 [2021-07-09 17:30:05,456 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 263 [2021-07-09 17:30:06,008 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 508 [2021-07-09 17:30:08,969 WARN L205 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 986 DAG size of output: 1338 [2021-07-09 17:30:09,521 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 749 [2021-07-09 17:30:09,953 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 305 [2021-07-09 17:30:10,920 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 211 [2021-07-09 17:30:11,846 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 224 [2021-07-09 17:30:11,986 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 229 [2021-07-09 17:30:12,478 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 484 [2021-07-09 17:30:12,908 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 231 [2021-07-09 17:30:13,240 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 217 [2021-07-09 17:30:13,534 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 321 [2021-07-09 17:30:14,038 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 399 [2021-07-09 17:30:14,427 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 686 [2021-07-09 17:30:14,707 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 361 [2021-07-09 17:30:15,649 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 224 [2021-07-09 17:30:16,137 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 403 [2021-07-09 17:30:17,210 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 281 [2021-07-09 17:30:17,372 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 249 [2021-07-09 17:30:17,952 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 347 [2021-07-09 17:30:18,387 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 415 [2021-07-09 17:30:19,371 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 1350 DAG size of output: 700 [2021-07-09 17:30:21,105 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-07-09 17:30:22,817 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-07-09 17:30:24,034 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 2056 DAG size of output: 695 [2021-07-09 17:30:25,150 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 697 DAG size of output: 852 [2021-07-09 17:30:25,298 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 214 [2021-07-09 17:30:26,081 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 541 [2021-07-09 17:30:26,457 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 313 [2021-07-09 17:30:26,825 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-07-09 17:30:27,165 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-07-09 17:30:27,581 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 371 [2021-07-09 17:30:27,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:28,271 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:30:28,271 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:30:28,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:30:29,058 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 298 [2021-07-09 17:30:29,199 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-07-09 17:30:29,338 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-07-09 17:30:29,524 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 312 [2021-07-09 17:30:29,777 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 396 [2021-07-09 17:30:29,917 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 309 [2021-07-09 17:30:30,998 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 212 [2021-07-09 17:30:31,113 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 239 [2021-07-09 17:30:31,313 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 308 [2021-07-09 17:30:32,524 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 308 [2021-07-09 17:30:33,450 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 447 [2021-07-09 17:30:33,822 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 721 DAG size of output: 505 [2021-07-09 17:30:34,515 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 1067 DAG size of output: 653 [2021-07-09 17:30:34,633 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 256 [2021-07-09 17:30:35,383 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 238 [2021-07-09 17:30:35,600 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 315 [2021-07-09 17:30:35,837 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 343 [2021-07-09 17:30:36,472 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 245 [2021-07-09 17:30:36,615 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 271 [2021-07-09 17:30:37,075 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 495 [2021-07-09 17:30:37,685 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 250 [2021-07-09 17:30:37,867 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 278 [2021-07-09 17:30:38,584 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 383 [2021-07-09 17:30:38,887 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 406 [2021-07-09 17:30:39,770 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 740 [2021-07-09 17:30:41,143 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 257 [2021-07-09 17:30:41,319 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 302 [2021-07-09 17:30:41,656 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 450 [2021-07-09 17:30:42,051 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 489 [2021-07-09 17:30:43,066 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 322 [2021-07-09 17:30:43,312 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 351 [2021-07-09 17:30:43,543 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 378 [2021-07-09 17:30:44,322 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 704 [2021-07-09 17:30:46,209 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 1540 DAG size of output: 1209 [2021-07-09 17:30:49,266 WARN L205 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 2433 DAG size of output: 1679 [2021-07-09 17:30:52,812 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-07-09 17:30:56,357 WARN L205 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-07-09 17:30:59,966 WARN L205 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 2450 DAG size of output: 1487 [2021-07-09 17:31:05,242 WARN L205 SmtUtils]: Spent 5.27 s on a formula simplification. DAG size of input: 1489 DAG size of output: 1519 [2021-07-09 17:31:05,497 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1328 [2021-07-09 17:31:05,649 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-07-09 17:31:05,760 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 554 [2021-07-09 17:31:06,555 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 474 [2021-07-09 17:31:07,499 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 349 [2021-07-09 17:31:07,663 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 366 [2021-07-09 17:31:07,955 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 389 [2021-07-09 17:31:08,269 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 487 [2021-07-09 17:31:08,718 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 1443 DAG size of output: 594 [2021-07-09 17:31:09,285 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 1486 DAG size of output: 610 [2021-07-09 17:31:10,009 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-07-09 17:31:10,738 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-07-09 17:31:11,608 WARN L205 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 683 [2021-07-09 17:31:12,128 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 451 [2021-07-09 17:31:13,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:13,499 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:31:13,499 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:31:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:31:14,195 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 316 [2021-07-09 17:31:14,335 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 329 [2021-07-09 17:31:14,509 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-07-09 17:31:14,682 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-07-09 17:31:14,916 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 331 [2021-07-09 17:31:15,140 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 381 [2021-07-09 17:31:15,381 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 361 [2021-07-09 17:31:15,560 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 306 [2021-07-09 17:31:15,790 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 287 [2021-07-09 17:31:16,135 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 298 [2021-07-09 17:31:16,500 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 351 [2021-07-09 17:31:16,709 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 311 [2021-07-09 17:31:17,097 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 285 [2021-07-09 17:31:17,342 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 285 [2021-07-09 17:31:17,478 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 298 [2021-07-09 17:31:17,715 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 367 [2021-07-09 17:31:18,137 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 491 [2021-07-09 17:31:18,582 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 494 [2021-07-09 17:31:18,771 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 269 [2021-07-09 17:31:18,885 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 226 [2021-07-09 17:31:19,019 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 199 [2021-07-09 17:31:20,198 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 292 [2021-07-09 17:31:20,911 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-07-09 17:31:21,615 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-07-09 17:31:22,407 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 651 [2021-07-09 17:31:23,272 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 691 [2021-07-09 17:31:24,744 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 234 [2021-07-09 17:31:25,105 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 321 [2021-07-09 17:31:25,816 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 621 [2021-07-09 17:31:26,662 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 211 [2021-07-09 17:31:27,078 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 284 [2021-07-09 17:31:27,340 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 289 [2021-07-09 17:31:28,099 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 396 [2021-07-09 17:31:28,526 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-07-09 17:31:28,973 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-07-09 17:31:29,486 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 1031 DAG size of output: 465 [2021-07-09 17:31:29,631 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 278 [2021-07-09 17:31:29,764 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 285 [2021-07-09 17:31:30,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:30,059 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:31:30,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:30,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:31:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810811764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:30,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:31:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760560169] [2021-07-09 17:31:30,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:31:30,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:31:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:30,087 INFO L87 Difference]: Start difference. First operand 947 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:31:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:30,590 INFO L93 Difference]: Finished difference Result 1018 states and 3228 transitions. [2021-07-09 17:31:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:31:30,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:31:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:30,592 INFO L225 Difference]: With dead ends: 1018 [2021-07-09 17:31:30,592 INFO L226 Difference]: Without dead ends: 1008 [2021-07-09 17:31:30,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:31:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-07-09 17:31:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 951. [2021-07-09 17:31:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-07-09 17:31:30,603 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-07-09 17:31:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:30,603 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-07-09 17:31:30,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:31:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-07-09 17:31:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:31:30,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:30,604 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20630 [2021-07-09 17:31:30,841 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,842 INFO L82 PathProgramCache]: Analyzing trace with hash 754746123, now seen corresponding path program 206 times [2021-07-09 17:31:30,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806619089] [2021-07-09 17:31:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:30,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806619089] [2021-07-09 17:31:30,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806619089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857525855] [2021-07-09 17:31:30,937 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:30,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:30,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:31:30,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,375 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:31:31,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:32,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,576 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:31:32,576 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:31:32,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:31:33,231 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-07-09 17:31:33,417 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 311 [2021-07-09 17:31:34,111 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 200 [2021-07-09 17:31:34,227 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 219 [2021-07-09 17:31:34,407 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 280 [2021-07-09 17:31:34,555 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 310 [2021-07-09 17:31:34,671 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 246 [2021-07-09 17:31:34,804 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 242 [2021-07-09 17:31:35,761 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 264 [2021-07-09 17:31:35,954 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 284 [2021-07-09 17:31:36,199 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 307 [2021-07-09 17:31:36,595 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 430 [2021-07-09 17:31:37,159 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-07-09 17:31:37,703 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-07-09 17:31:38,371 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 466 [2021-07-09 17:31:38,835 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 328 [2021-07-09 17:31:39,655 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 190 [2021-07-09 17:31:39,826 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 217 [2021-07-09 17:31:40,048 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2021-07-09 17:31:40,512 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 190 [2021-07-09 17:31:41,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:41,814 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:31:41,814 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:31:41,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:31:43,189 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 263 [2021-07-09 17:31:43,380 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 285 [2021-07-09 17:31:44,672 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 252 [2021-07-09 17:31:45,109 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 424 [2021-07-09 17:31:46,361 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 266 [2021-07-09 17:31:47,325 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 291 [2021-07-09 17:31:47,741 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 429 [2021-07-09 17:31:48,681 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 1007 DAG size of output: 696 [2021-07-09 17:31:49,821 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1051 DAG size of output: 720 [2021-07-09 17:31:51,179 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-07-09 17:31:52,534 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-07-09 17:31:53,696 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1098 DAG size of output: 513 [2021-07-09 17:31:53,816 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 513 [2021-07-09 17:31:54,116 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 458 [2021-07-09 17:31:54,360 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 276 [2021-07-09 17:31:55,040 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 243 [2021-07-09 17:31:55,207 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-07-09 17:31:55,357 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-07-09 17:31:55,540 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 271 [2021-07-09 17:31:55,729 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 280 [2021-07-09 17:31:55,857 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 193 [2021-07-09 17:31:56,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:56,636 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:31:56,637 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:31:56,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:31:57,880 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 230 [2021-07-09 17:31:58,040 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 277 [2021-07-09 17:31:58,885 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 243 [2021-07-09 17:31:59,233 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-07-09 17:31:59,557 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-07-09 17:31:59,965 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 430 [2021-07-09 17:32:00,314 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 422 [2021-07-09 17:32:00,419 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 192 [2021-07-09 17:32:01,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:01,049 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:32:01,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:01,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:32:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857525855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:01,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:32:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450036581] [2021-07-09 17:32:01,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:32:01,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:32:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:01,076 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:32:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:01,594 INFO L93 Difference]: Finished difference Result 1044 states and 3286 transitions. [2021-07-09 17:32:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:32:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:32:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:01,596 INFO L225 Difference]: With dead ends: 1044 [2021-07-09 17:32:01,596 INFO L226 Difference]: Without dead ends: 1034 [2021-07-09 17:32:01,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:32:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-09 17:32:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 951. [2021-07-09 17:32:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-07-09 17:32:01,607 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-07-09 17:32:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:01,607 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-07-09 17:32:01,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:32:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-07-09 17:32:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:32:01,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:01,635 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:01,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28098 [2021-07-09 17:32:01,836 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1412276551, now seen corresponding path program 207 times [2021-07-09 17:32:01,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:01,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052367404] [2021-07-09 17:32:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:01,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052367404] [2021-07-09 17:32:01,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052367404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136457946] [2021-07-09 17:32:01,948 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:01,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:32:01,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:01,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:32:01,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:02,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:02,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:03,141 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 316 [2021-07-09 17:32:03,341 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 277 [2021-07-09 17:32:03,481 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 274 [2021-07-09 17:32:04,718 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 272 [2021-07-09 17:32:04,886 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 266 [2021-07-09 17:32:05,075 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 330 [2021-07-09 17:32:05,349 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 433 [2021-07-09 17:32:05,752 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 736 DAG size of output: 517 [2021-07-09 17:32:05,959 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 216 [2021-07-09 17:32:06,839 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 321 [2021-07-09 17:32:07,033 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 339 [2021-07-09 17:32:07,737 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-07-09 17:32:08,447 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-07-09 17:32:09,213 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 1149 DAG size of output: 749 [2021-07-09 17:32:09,642 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 513 [2021-07-09 17:32:09,789 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 281 [2021-07-09 17:32:09,898 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 209 [2021-07-09 17:32:10,486 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 477 [2021-07-09 17:32:11,197 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 282 [2021-07-09 17:32:11,724 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 258 [2021-07-09 17:32:11,904 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-07-09 17:32:12,084 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-07-09 17:32:12,300 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 328 [2021-07-09 17:32:12,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:32:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136457946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:12,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:32:12,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291459175] [2021-07-09 17:32:12,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:32:12,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:32:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:12,613 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:32:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:13,030 INFO L93 Difference]: Finished difference Result 1074 states and 3428 transitions. [2021-07-09 17:32:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:32:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:32:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:13,032 INFO L225 Difference]: With dead ends: 1074 [2021-07-09 17:32:13,032 INFO L226 Difference]: Without dead ends: 1058 [2021-07-09 17:32:13,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-07-09 17:32:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1006. [2021-07-09 17:32:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.261691542288557) internal successors, (3278), 1005 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3278 transitions. [2021-07-09 17:32:13,045 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3278 transitions. Word has length 20 [2021-07-09 17:32:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:13,045 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3278 transitions. [2021-07-09 17:32:13,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:32:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3278 transitions. [2021-07-09 17:32:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:32:13,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:13,046 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:13,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29718,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,263 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash -553402021, now seen corresponding path program 208 times [2021-07-09 17:32:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:13,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65916616] [2021-07-09 17:32:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:13,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65916616] [2021-07-09 17:32:13,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65916616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606120019] [2021-07-09 17:32:13,372 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:13,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:32:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:13,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:14,523 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 290 [2021-07-09 17:32:14,744 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 298 [2021-07-09 17:32:14,852 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 274 [2021-07-09 17:32:15,807 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 292 [2021-07-09 17:32:16,658 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-07-09 17:32:16,852 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-07-09 17:32:17,089 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 729 DAG size of output: 418 [2021-07-09 17:32:17,666 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 217 [2021-07-09 17:32:17,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,425 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:32:18,426 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:32:18,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:32:19,136 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 291 [2021-07-09 17:32:20,089 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 297 [2021-07-09 17:32:20,315 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-07-09 17:32:20,560 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-07-09 17:32:20,822 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 345 [2021-07-09 17:32:21,295 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 363 [2021-07-09 17:32:21,482 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 242 [2021-07-09 17:32:21,788 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 243 [2021-07-09 17:32:22,202 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-07-09 17:32:22,365 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-07-09 17:32:22,550 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 280 [2021-07-09 17:32:22,714 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 272 [2021-07-09 17:32:23,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:23,975 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:32:23,976 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:32:23,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:32:24,607 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 265 [2021-07-09 17:32:24,724 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 238 [2021-07-09 17:32:24,838 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 246 [2021-07-09 17:32:24,970 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 311 [2021-07-09 17:32:25,143 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 307 [2021-07-09 17:32:25,246 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 260 [2021-07-09 17:32:25,411 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 278 [2021-07-09 17:32:25,976 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 331 [2021-07-09 17:32:27,048 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 344 [2021-07-09 17:32:27,357 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 487 [2021-07-09 17:32:27,761 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 527 [2021-07-09 17:32:28,343 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-07-09 17:32:28,768 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-07-09 17:32:29,294 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 565 [2021-07-09 17:32:29,496 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 670 [2021-07-09 17:32:29,990 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 419 [2021-07-09 17:32:30,095 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 215 [2021-07-09 17:32:30,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:31,129 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:32:31,129 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:32:31,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:32:31,666 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 224 [2021-07-09 17:32:32,237 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 258 [2021-07-09 17:32:32,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:32,930 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:32:32,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:32,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:32:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:32,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606120019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:32,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:32:32,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720661393] [2021-07-09 17:32:32,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:32:32,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:32:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:32,959 INFO L87 Difference]: Start difference. First operand 1006 states and 3278 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:32:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:33,711 INFO L93 Difference]: Finished difference Result 1179 states and 3670 transitions. [2021-07-09 17:32:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:32:33,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:32:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:33,713 INFO L225 Difference]: With dead ends: 1179 [2021-07-09 17:32:33,713 INFO L226 Difference]: Without dead ends: 1153 [2021-07-09 17:32:33,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:32:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-07-09 17:32:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1019. [2021-07-09 17:32:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.2652259332023577) internal successors, (3324), 1018 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3324 transitions. [2021-07-09 17:32:33,726 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3324 transitions. Word has length 20 [2021-07-09 17:32:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:33,726 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3324 transitions. [2021-07-09 17:32:33,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:32:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3324 transitions. [2021-07-09 17:32:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:32:33,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:33,727 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:33,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30435,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,943 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1157211287, now seen corresponding path program 209 times [2021-07-09 17:32:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:33,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056899877] [2021-07-09 17:32:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:34,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056899877] [2021-07-09 17:32:34,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056899877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659619951] [2021-07-09 17:32:34,045 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:34,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:32:34,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:34,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:32:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:34,513 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:32:34,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:34,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:35,777 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 253 [2021-07-09 17:32:35,968 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 325 [2021-07-09 17:32:36,246 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-07-09 17:32:36,499 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-07-09 17:32:36,785 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 371 [2021-07-09 17:32:37,153 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 425 [2021-07-09 17:32:37,399 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 341 [2021-07-09 17:32:37,832 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 222 [2021-07-09 17:32:38,379 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-07-09 17:32:38,563 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-07-09 17:32:38,753 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 301 [2021-07-09 17:32:38,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,433 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:32:39,434 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:32:39,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:32:40,335 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 350 [2021-07-09 17:32:40,511 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 370 [2021-07-09 17:32:40,688 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 397 [2021-07-09 17:32:40,903 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 419 [2021-07-09 17:32:41,169 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 440 [2021-07-09 17:32:41,663 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 457 [2021-07-09 17:32:42,040 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-07-09 17:32:42,390 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-07-09 17:32:42,831 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 488 [2021-07-09 17:32:43,088 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 489 [2021-07-09 17:32:43,432 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 381 [2021-07-09 17:32:43,660 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 351 [2021-07-09 17:32:43,912 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 348 [2021-07-09 17:32:44,326 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 300 [2021-07-09 17:32:44,694 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 250 [2021-07-09 17:32:45,056 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 316 [2021-07-09 17:32:45,489 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 341 [2021-07-09 17:32:45,799 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 364 [2021-07-09 17:32:46,128 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 381 [2021-07-09 17:32:46,462 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 394 [2021-07-09 17:32:46,888 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 418 [2021-07-09 17:32:47,371 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-07-09 17:32:47,832 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-07-09 17:32:48,390 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 430 [2021-07-09 17:32:49,323 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 468 [2021-07-09 17:32:49,763 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 425 [2021-07-09 17:32:50,061 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-07-09 17:32:50,314 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 349 [2021-07-09 17:32:50,519 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2021-07-09 17:32:51,189 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 230 [2021-07-09 17:32:51,324 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 238 [2021-07-09 17:32:51,495 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 250 [2021-07-09 17:32:51,715 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 261 [2021-07-09 17:32:51,897 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 286 [2021-07-09 17:32:52,150 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-07-09 17:32:52,315 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 275 [2021-07-09 17:32:52,445 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 210 [2021-07-09 17:32:53,452 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-07-09 17:32:53,820 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-07-09 17:32:54,147 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 276 [2021-07-09 17:32:54,698 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 299 [2021-07-09 17:32:54,959 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 263 [2021-07-09 17:32:55,595 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 203 [2021-07-09 17:32:55,778 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-07-09 17:32:55,949 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-07-09 17:32:56,107 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 206 [2021-07-09 17:32:56,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:56,961 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:32:56,962 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:32:56,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:32:58,135 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-07-09 17:32:58,371 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-07-09 17:32:58,631 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 370 [2021-07-09 17:32:59,041 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 473 [2021-07-09 17:32:59,152 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 327 [2021-07-09 17:32:59,335 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 292 [2021-07-09 17:32:59,859 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 231 [2021-07-09 17:33:00,451 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 308 [2021-07-09 17:33:01,118 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 567 [2021-07-09 17:33:01,477 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 350 [2021-07-09 17:33:02,478 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 282 [2021-07-09 17:33:02,648 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 292 [2021-07-09 17:33:02,888 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 365 [2021-07-09 17:33:03,292 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-07-09 17:33:03,694 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-07-09 17:33:04,147 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 968 DAG size of output: 445 [2021-07-09 17:33:04,640 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 589 [2021-07-09 17:33:05,034 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 460 [2021-07-09 17:33:05,272 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 232 [2021-07-09 17:33:06,124 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 268 [2021-07-09 17:33:06,426 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-07-09 17:33:06,745 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-07-09 17:33:07,069 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 382 [2021-07-09 17:33:07,316 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 346 [2021-07-09 17:33:08,030 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 229 [2021-07-09 17:33:08,134 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 215 [2021-07-09 17:33:08,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:08,638 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:33:08,638 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:33:08,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:33:10,078 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 272 [2021-07-09 17:33:10,224 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 311 [2021-07-09 17:33:10,750 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 358 [2021-07-09 17:33:11,017 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-07-09 17:33:11,296 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-07-09 17:33:11,608 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 414 [2021-07-09 17:33:11,795 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 451 [2021-07-09 17:33:12,027 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 340 [2021-07-09 17:33:12,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:12,600 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:33:12,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:12,601 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:33:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659619951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:12,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:33:12,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91063324] [2021-07-09 17:33:12,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:33:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:12,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:33:12,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:12,626 INFO L87 Difference]: Start difference. First operand 1019 states and 3324 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:33:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:13,074 INFO L93 Difference]: Finished difference Result 1092 states and 3484 transitions. [2021-07-09 17:33:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:33:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:33:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:13,076 INFO L225 Difference]: With dead ends: 1092 [2021-07-09 17:33:13,076 INFO L226 Difference]: Without dead ends: 1082 [2021-07-09 17:33:13,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:33:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-07-09 17:33:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-07-09 17:33:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-07-09 17:33:13,088 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-07-09 17:33:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:13,088 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-07-09 17:33:13,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:33:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-07-09 17:33:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:33:13,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:13,089 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:13,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31818,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:13,305 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1648351013, now seen corresponding path program 210 times [2021-07-09 17:33:13,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:13,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777388314] [2021-07-09 17:33:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:13,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777388314] [2021-07-09 17:33:13,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777388314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882297475] [2021-07-09 17:33:13,423 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:13,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:33:13,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:13,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:33:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:13,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:33:15,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,462 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:33:15,463 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:33:15,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:33:16,539 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 361 [2021-07-09 17:33:16,739 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-07-09 17:33:16,939 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-07-09 17:33:17,215 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 388 [2021-07-09 17:33:17,517 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 494 [2021-07-09 17:33:17,736 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 378 [2021-07-09 17:33:18,185 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 256 [2021-07-09 17:33:18,597 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 267 [2021-07-09 17:33:18,795 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 316 [2021-07-09 17:33:18,933 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 301 [2021-07-09 17:33:19,463 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 224 [2021-07-09 17:33:19,567 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 236 [2021-07-09 17:33:19,806 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 231 [2021-07-09 17:33:20,060 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-07-09 17:33:20,332 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-07-09 17:33:20,638 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 353 [2021-07-09 17:33:20,787 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 356 [2021-07-09 17:33:21,108 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-07-09 17:33:21,290 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 352 [2021-07-09 17:33:22,743 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 273 [2021-07-09 17:33:22,945 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 294 [2021-07-09 17:33:23,215 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 343 [2021-07-09 17:33:23,563 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-07-09 17:33:23,890 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-07-09 17:33:24,235 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 327 [2021-07-09 17:33:24,662 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 407 [2021-07-09 17:33:25,114 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 286 [2021-07-09 17:33:25,287 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 266 [2021-07-09 17:33:26,034 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 229 [2021-07-09 17:33:26,307 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-07-09 17:33:26,569 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-07-09 17:33:26,846 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 318 [2021-07-09 17:33:27,225 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 371 [2021-07-09 17:33:27,362 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 293 [2021-07-09 17:33:28,167 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 309 [2021-07-09 17:33:28,362 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-07-09 17:33:28,573 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-07-09 17:33:28,804 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 362 [2021-07-09 17:33:29,006 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 265 [2021-07-09 17:33:29,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:29,797 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-09 17:33:29,798 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-09 17:33:29,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-09 17:33:30,433 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 249 [2021-07-09 17:33:30,570 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 288 [2021-07-09 17:33:31,469 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-07-09 17:33:31,600 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-07-09 17:33:31,758 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 217 [2021-07-09 17:33:31,889 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 267 [2021-07-09 17:33:31,996 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 226 [2021-07-09 17:33:33,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:33,278 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:33:33,278 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:33:33,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:33:33,752 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 190 [2021-07-09 17:33:34,530 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 219 [2021-07-09 17:33:35,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:35,232 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 17:33:35,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:35,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-09 17:33:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:35,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882297475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:35,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 17:33:35,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653156452] [2021-07-09 17:33:35,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:33:35,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:35,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:33:35,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:35,260 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:33:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:35,850 INFO L93 Difference]: Finished difference Result 1112 states and 3526 transitions. [2021-07-09 17:33:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:33:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-09 17:33:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:35,851 INFO L225 Difference]: With dead ends: 1112 [2021-07-09 17:33:35,852 INFO L226 Difference]: Without dead ends: 1102 [2021-07-09 17:33:35,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 525.8ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:33:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-07-09 17:33:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1022. [2021-07-09 17:33:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-07-09 17:33:35,863 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-07-09 17:33:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:35,863 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-07-09 17:33:35,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-07-09 17:33:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-07-09 17:33:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:33:35,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:35,864 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:36,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34189 [2021-07-09 17:33:36,065 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:36,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1573530903, now seen corresponding path program 211 times [2021-07-09 17:33:36,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:36,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144377017] [2021-07-09 17:33:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:36,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:36,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144377017] [2021-07-09 17:33:36,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144377017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114074483] [2021-07-09 17:33:36,174 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:36,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:33:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:36,688 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:33:36,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:36,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:33:37,421 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 249 [2021-07-09 17:33:37,541 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 260 [2021-07-09 17:33:37,807 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 351 [2021-07-09 17:33:37,921 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 265 [2021-07-09 17:33:38,105 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 253 [2021-07-09 17:33:38,685 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 296 [2021-07-09 17:33:39,117 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 361 [2021-07-09 17:33:39,322 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 390 [2021-07-09 17:33:39,589 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 434 [2021-07-09 17:33:39,817 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 286 [2021-07-09 17:33:41,023 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 244 [2021-07-09 17:33:41,235 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 289 [2021-07-09 17:33:41,453 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 372 [2021-07-09 17:33:42,032 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 1157 DAG size of output: 652 [2021-07-09 17:33:42,747 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-07-09 17:33:43,460 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-07-09 17:33:44,241 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 715 [2021-07-09 17:33:45,747 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 717 DAG size of output: 423 [2021-07-09 17:33:46,171 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 111 [2021-07-09 17:33:46,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,108 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-09 17:33:47,108 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-09 17:33:47,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-09 17:33:47,644 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 342 [2021-07-09 17:33:48,336 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 481 [2021-07-09 17:33:48,563 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 501 [2021-07-09 17:33:48,840 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 529 [2021-07-09 17:33:49,192 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 544 [2021-07-09 17:33:50,254 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 414 [2021-07-09 17:33:50,447 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 436 [2021-07-09 17:33:50,700 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 452 [2021-07-09 17:33:51,349 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-07-09 17:33:52,001 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-07-09 17:33:52,793 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 807 [2021-07-09 17:33:53,873 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 809 DAG size of output: 994 [2021-07-09 17:33:54,812 WARN L205 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 881 [2021-07-09 17:33:55,469 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 648 [2021-07-09 17:33:55,717 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 566 [2021-07-09 17:33:56,035 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 414 [2021-07-09 17:33:56,192 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 388 [2021-07-09 17:33:56,381 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2021-07-09 17:33:57,123 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 268 [2021-07-09 17:33:57,827 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-07-09 17:33:58,001 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 300 [2021-07-09 17:33:58,358 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 367 [2021-07-09 17:33:58,965 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 551 [2021-07-09 17:33:59,841 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 677 [2021-07-09 17:33:59,953 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 342 [2021-07-09 17:34:01,285 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 259 [2021-07-09 17:34:01,590 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 320 [2021-07-09 17:34:01,987 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 397 [2021-07-09 17:34:02,476 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 418 [2021-07-09 17:34:03,119 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 507 [2021-07-09 17:34:04,861 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 1053 DAG size of output: 866 [2021-07-09 17:34:05,593 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 607 [2021-07-09 17:34:06,086 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 545 [2021-07-09 17:34:06,312 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-07-09 17:34:07,135 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 343 [2021-07-09 17:34:07,641 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 291 [2021-07-09 17:34:08,068 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 451 [2021-07-09 17:34:08,586 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 472 [2021-07-09 17:34:09,222 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 488 [2021-07-09 17:34:10,314 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 885 DAG size of output: 764 [2021-07-09 17:34:10,775 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 549 [2021-07-09 17:34:10,991 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 345 [2021-07-09 17:34:11,680 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 278 [2021-07-09 17:34:12,379 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 253 [2021-07-09 17:34:12,796 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 418 [2021-07-09 17:34:13,320 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 446 [2021-07-09 17:34:13,929 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 474 [2021-07-09 17:34:14,779 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 568 [2021-07-09 17:34:16,126 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 994 DAG size of output: 861 [2021-07-09 17:34:18,948 WARN L205 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 1302 DAG size of output: 1160 [2021-07-09 17:34:23,906 WARN L205 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 1780 DAG size of output: 1685 [2021-07-09 17:34:24,135 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 348 [2021-07-09 17:34:24,467 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 375 [2021-07-09 17:34:24,694 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 333 [2021-07-09 17:34:25,005 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 349 [2021-07-09 17:34:25,478 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 252 [2021-07-09 17:34:25,627 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 270 [2021-07-09 17:34:25,821 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-07-09 17:34:25,986 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 287 [2021-07-09 17:34:26,525 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-07-09 17:34:26,913 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 477 [2021-07-09 17:34:27,376 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 495 [2021-07-09 17:34:28,112 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 552 [2021-07-09 17:34:29,131 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 747 DAG size of output: 634 [2021-07-09 17:34:29,500 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 359 [2021-07-09 17:34:29,697 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 316 [2021-07-09 17:34:29,821 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 276 [2021-07-09 17:34:29,967 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 283 [2021-07-09 17:34:30,220 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 250 [2021-07-09 17:34:30,445 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 359 [2021-07-09 17:34:30,842 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 503 [2021-07-09 17:34:31,351 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 525 [2021-07-09 17:34:31,960 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 533 [2021-07-09 17:34:32,438 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 259 [2021-07-09 17:34:32,582 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 267 [2021-07-09 17:34:33,467 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 587 [2021-07-09 17:34:35,684 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 996 DAG size of output: 805 [2021-07-09 17:34:35,804 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 256 [2021-07-09 17:34:36,019 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 265 [2021-07-09 17:34:36,567 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 215 [2021-07-09 17:34:37,205 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 264 [2021-07-09 17:34:37,532 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 304 [2021-07-09 17:34:38,084 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 238 [2021-07-09 17:34:38,278 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 257 [2021-07-09 17:34:38,434 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 273 [2021-07-09 17:34:38,610 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 281 [2021-07-09 17:34:39,204 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 426 [2021-07-09 17:34:41,601 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 1211 DAG size of output: 891 [2021-07-09 17:34:49,186 WARN L205 SmtUtils]: Spent 7.58 s on a formula simplification. DAG size of input: 2487 DAG size of output: 2146 [2021-07-09 17:34:50,141 WARN L205 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 716 [2021-07-09 17:34:50,354 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 369 [2021-07-09 17:34:50,683 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-07-09 17:34:51,015 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 382 [2021-07-09 17:34:51,235 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 370 [2021-07-09 17:34:51,479 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 342 [2021-07-09 17:34:51,970 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 267 [2021-07-09 17:34:52,146 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 275 [2021-07-09 17:34:52,425 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 428 [2021-07-09 17:34:52,932 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 586 [2021-07-09 17:34:53,192 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 353 [2021-07-09 17:34:53,483 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 352 [2021-07-09 17:34:54,188 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 325 [2021-07-09 17:34:54,564 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 470 [2021-07-09 17:34:55,662 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 813 DAG size of output: 755 [2021-07-09 17:34:55,840 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 343 [2021-07-09 17:34:56,089 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 363 [2021-07-09 17:34:56,509 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 253 [2021-07-09 17:34:56,654 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 273 [2021-07-09 17:34:56,779 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 332 [2021-07-09 17:34:57,180 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 270 [2021-07-09 17:34:57,430 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 429 [2021-07-09 17:34:57,758 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 455 [2021-07-09 17:34:58,335 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 549 [2021-07-09 17:34:59,124 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 649 [2021-07-09 17:35:00,100 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 671 [2021-07-09 17:35:02,464 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 1203 DAG size of output: 1037 [2021-07-09 17:35:02,582 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 255 [2021-07-09 17:35:02,736 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 266 [2021-07-09 17:35:03,299 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 254 [2021-07-09 17:35:03,439 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 262 [2021-07-09 17:35:03,547 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 242 [2021-07-09 17:35:04,092 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 246 [2021-07-09 17:35:04,236 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 254 [2021-07-09 17:35:04,454 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 283 [2021-07-09 17:35:04,859 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 364 [2021-07-09 17:35:05,059 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 264 [2021-07-09 17:35:05,666 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 247 [2021-07-09 17:35:05,803 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-07-09 17:35:05,926 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 243 [2021-07-09 17:35:06,547 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 274 [2021-07-09 17:35:06,914 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 369 [2021-07-09 17:35:07,389 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 409 [2021-07-09 17:35:08,427 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 721 DAG size of output: 540 [2021-07-09 17:35:11,608 WARN L205 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 1571 DAG size of output: 1210 [2021-07-09 17:35:11,788 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 563 [2021-07-09 17:35:12,698 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 270 [2021-07-09 17:35:12,834 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 285 [2021-07-09 17:35:13,518 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 278 [2021-07-09 17:35:13,693 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 301 [2021-07-09 17:35:14,084 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 377 [2021-07-09 17:35:14,580 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 453 [2021-07-09 17:35:15,309 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-07-09 17:35:16,050 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 350 [2021-07-09 17:35:16,458 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 432 [2021-07-09 17:35:16,962 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 483 [2021-07-09 17:35:17,614 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 506 [2021-07-09 17:35:18,922 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 856 DAG size of output: 678 [2021-07-09 17:35:19,148 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 385 [2021-07-09 17:35:19,352 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 399 [2021-07-09 17:35:19,893 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 252 [2021-07-09 17:35:20,092 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 312 [2021-07-09 17:35:20,597 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 208 [2021-07-09 17:35:20,824 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 247 [2021-07-09 17:35:21,305 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 458 [2021-07-09 17:35:21,920 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 476 [2021-07-09 17:35:22,766 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 620 [2021-07-09 17:35:22,978 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 379 [2021-07-09 17:35:23,753 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 306 [2021-07-09 17:35:24,204 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 221 [2021-07-09 17:35:24,386 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 258 [2021-07-09 17:35:24,855 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 470 [2021-07-09 17:35:25,510 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 584 [2021-07-09 17:35:26,373 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 729 [2021-07-09 17:35:27,401 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 807 DAG size of output: 756 [2021-07-09 17:35:29,505 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 1058 DAG size of output: 1016 [2021-07-09 17:35:33,222 WARN L205 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 1591 DAG size of output: 1440 [2021-07-09 17:35:37,532 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 1650 DAG size of output: 1493 [2021-07-09 17:35:42,637 WARN L205 SmtUtils]: Spent 5.10 s on a formula simplification. DAG size of input: 1836 DAG size of output: 1636 [2021-07-09 17:35:52,021 WARN L205 SmtUtils]: Spent 9.37 s on a formula simplification. DAG size of input: 2963 DAG size of output: 2563 [2021-07-09 17:36:10,590 WARN L205 SmtUtils]: Spent 18.55 s on a formula simplification. DAG size of input: 4614 DAG size of output: 4052 [2021-07-09 17:36:11,750 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 800 DAG size of output: 976 [2021-07-09 17:36:13,000 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 716 DAG size of output: 682 [2021-07-09 17:36:13,250 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 358 [2021-07-09 17:36:13,358 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 248 [2021-07-09 17:36:14,440 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 227 [2021-07-09 17:36:14,716 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 229 [2021-07-09 17:36:14,980 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 262 [2021-07-09 17:36:15,300 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 387 [2021-07-09 17:36:15,466 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 330 [2021-07-09 17:36:15,949 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 234 [2021-07-09 17:36:16,190 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 285 [2021-07-09 17:36:16,447 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 301 [2021-07-09 17:36:16,822 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 392 [2021-07-09 17:36:17,129 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 369 [2021-07-09 17:36:17,305 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 354 [2021-07-09 17:36:17,472 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 299 [2021-07-09 17:36:17,737 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 243 [2021-07-09 17:36:17,898 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 257 [2021-07-09 17:36:18,268 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 425 [2021-07-09 17:36:18,475 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 317 [2021-07-09 17:36:18,790 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 251 [2021-07-09 17:36:19,006 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 265 [2021-07-09 17:36:19,748 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 457 [2021-07-09 17:36:20,981 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 791 DAG size of output: 601 [2021-07-09 17:36:22,131 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 903 DAG size of output: 569 [2021-07-09 17:36:23,457 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 917 DAG size of output: 577 [2021-07-09 17:36:23,720 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 556 [2021-07-09 17:36:24,047 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 407 [2021-07-09 17:36:24,799 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 252 [2021-07-09 17:36:25,300 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 196 [2021-07-09 17:36:25,530 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 226 [2021-07-09 17:36:25,878 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 301 [2021-07-09 17:36:26,346 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 387 [2021-07-09 17:36:26,524 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 381 [2021-07-09 17:36:26,706 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2021-07-09 17:36:27,528 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 196 [2021-07-09 17:36:27,692 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 212 [2021-07-09 17:36:27,911 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 232 [2021-07-09 17:36:28,309 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 408 [2021-07-09 17:36:28,966 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 540 [2021-07-09 17:36:30,196 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 806 DAG size of output: 647 [2021-07-09 17:36:30,965 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 597 [2021-07-09 17:36:31,486 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 542 [2021-07-09 17:36:31,758 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 343 [2021-07-09 17:36:32,191 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 303 [2021-07-09 17:36:32,418 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 317 [2021-07-09 17:36:33,023 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 264 [2021-07-09 17:36:33,210 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 278 [2021-07-09 17:36:33,705 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 413 [2021-07-09 17:36:34,282 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 422 [2021-07-09 17:36:35,342 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 832 DAG size of output: 690 [2021-07-09 17:36:35,837 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 554 [2021-07-09 17:36:36,007 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 493 [2021-07-09 17:36:36,594 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 219 [2021-07-09 17:36:37,035 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 210 [2021-07-09 17:36:37,216 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 307 [2021-07-09 17:36:37,609 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 400 [2021-07-09 17:36:38,096 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 427 [2021-07-09 17:36:38,639 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 446 [2021-07-09 17:36:39,437 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 589 [2021-07-09 17:36:40,729 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 947 DAG size of output: 808 [2021-07-09 17:36:43,200 WARN L205 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 1252 DAG size of output: 1075 [2021-07-09 17:36:47,200 WARN L205 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 1464 DAG size of output: 1303 [2021-07-09 17:36:52,637 WARN L205 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 1926 DAG size of output: 1441 [2021-07-09 17:36:53,744 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 715 DAG size of output: 728 [2021-07-09 17:36:53,984 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 631 [2021-07-09 17:36:54,725 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 672 [2021-07-09 17:36:54,900 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 551 [2021-07-09 17:36:55,167 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 405 [2021-07-09 17:36:55,472 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 389 [2021-07-09 17:36:55,615 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 343 [2021-07-09 17:36:56,132 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-07-09 17:36:56,408 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 424 [2021-07-09 17:36:56,622 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 383 [2021-07-09 17:36:57,058 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 268 [2021-07-09 17:36:57,201 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 281 [2021-07-09 17:36:57,376 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 288 [2021-07-09 17:36:57,739 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 418 [2021-07-09 17:36:58,499 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 650 [2021-07-09 17:36:59,519 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 868 DAG size of output: 789 [2021-07-09 17:37:00,870 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1058 DAG size of output: 918 [2021-07-09 17:37:01,355 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 629 [2021-07-09 17:37:01,826 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 598 [2021-07-09 17:37:02,071 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 374 Received shutdown request... [2021-07-09 17:37:02,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35738,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:02,334 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:37:02,336 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:37:02,337 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:37:02,338 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:37:02 BasicIcfg [2021-07-09 17:37:02,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:37:02,338 INFO L168 Benchmark]: Toolchain (without parser) took 907152.48 ms. Allocated memory was 160.4 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 140.1 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-07-09 17:37:02,338 INFO L168 Benchmark]: Boogie PL CUP Parser took 1.23 ms. Allocated memory is still 160.4 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:37:02,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 160.4 MB. Free memory was 140.0 MB in the beginning and 138.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:37:02,338 INFO L168 Benchmark]: Boogie Preprocessor took 25.77 ms. Allocated memory is still 160.4 MB. Free memory was 138.5 MB in the beginning and 137.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:37:02,338 INFO L168 Benchmark]: RCFGBuilder took 328.17 ms. Allocated memory is still 160.4 MB. Free memory was 137.4 MB in the beginning and 116.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-07-09 17:37:02,338 INFO L168 Benchmark]: TraceAbstraction took 906774.54 ms. Allocated memory was 160.4 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 116.4 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-09 17:37:02,338 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 1.23 ms. Allocated memory is still 160.4 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 160.4 MB. Free memory was 140.0 MB in the beginning and 138.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.77 ms. Allocated memory is still 160.4 MB. Free memory was 138.5 MB in the beginning and 137.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.17 ms. Allocated memory is still 160.4 MB. Free memory was 137.4 MB in the beginning and 116.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 906774.54 ms. Allocated memory was 160.4 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 116.4 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 906718.7ms, OverallIterations: 228, TraceHistogramMax: 8, EmptinessCheckTime: 148.2ms, AutomataDifference: 43993.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4444 SDtfs, 10445 SDslu, 28860 SDs, 0 SdLazy, 51257 SolverSat, 6370 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21157.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7233 GetRequests, 2908 SyntacticMatches, 93 SemanticMatches, 4232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18689 ImplicationChecksByTransitivity, 41899.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1022occurred in iteration=226, InterpolantAutomatonStates: 3738, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1158.5ms AutomataMinimizationTime, 227 MinimizatonAttempts, 21627 StatesRemovedByMinimization, 223 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 652.4ms SsaConstructionTime, 2251.2ms SatisfiabilityAnalysisTime, 599512.0ms InterpolantComputationTime, 7691 NumberOfCodeBlocks, 7691 NumberOfCodeBlocksAsserted, 857 NumberOfCheckSat, 7241 ConstructedInterpolants, 6 QuantifiedInterpolants, 59502 SizeOfPredicates, 284 NumberOfNonLiveVariables, 14878 ConjunctsInSsa, 4464 ConjunctsInUnsatCore, 450 InterpolantComputations, 4 PerfectInterpolantSequences, 2014/10209 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