/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:52:30,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:52:30,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:52:30,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:52:30,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 22:52:30,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 22:52:30,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 22:52:30,806 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 [2021-03-10 22:52:30,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:52:30,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:52:30,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:52:30,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:52:30,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:52:30,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:52:30,846 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:52:30,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:52:30,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:52:30,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:52:30,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:52:30,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:52:30,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:52:30,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:52:30,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:52:30,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:52:30,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:52:30,849 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:52:30,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:52:30,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:52:30,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:52:30,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:52:30,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:52:30,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:52:30,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:52:30,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:52:30,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:52:30,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:52:30,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:52:30,851 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:52:30,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:52:30,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:52:31,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:52:31,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:52:31,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:52:31,199 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:52:31,200 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:52:31,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-03-10 22:52:31,201 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-03-10 22:52:31,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:52:31,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:52:31,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:52:31,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:52:31,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:52:31,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:52:31,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:52:31,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:52:31,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:52:31,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/1) ... [2021-03-10 22:52:31,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:52:31,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:52:31,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:52:31,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:52:31,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (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 [2021-03-10 22:52:31,380 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:52:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:52:31,381 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:52:31,381 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:52:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:52:31,381 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:52:31,381 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:52:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:52:31,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:52:31,382 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:52:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:52:31,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:52:31,382 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 22:52:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 22:52:31,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 22:52:31,383 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:52:31,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:52:31,578 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:52:31,579 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:52:31 BoogieIcfgContainer [2021-03-10 22:52:31,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:52:31,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:52:31,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:52:31,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:52:31,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:52:31" (1/2) ... [2021-03-10 22:52:31,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f084ed and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:52:31, skipping insertion in model container [2021-03-10 22:52:31,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:52:31" (2/2) ... [2021-03-10 22:52:31,599 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-03-10 22:52:31,603 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:52:31,603 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:52:31,606 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:52:31,606 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:52:31,670 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 22:52:31,683 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 22:52:31,701 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:52:31,701 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:52:31,701 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:52:31,701 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:52:31,702 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:52:31,702 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:52:31,702 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:52:31,702 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:52:31,709 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-03-10 22:52:31,791 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:31,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:31,814 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:31,814 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash -353370600, now seen corresponding path program 1 times [2021-03-10 22:52:31,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:31,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941266127] [2021-03-10 22:52:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:32,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941266127] [2021-03-10 22:52:32,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:32,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911354425] [2021-03-10 22:52:32,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:32,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:32,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:32,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:32,049 INFO L87 Difference]: Start difference. First operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:32,161 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2021-03-10 22:52:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:32,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 22:52:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:32,192 INFO L225 Difference]: With dead ends: 961 [2021-03-10 22:52:32,192 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 22:52:32,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 22:52:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-03-10 22:52:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2021-03-10 22:52:32,310 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2021-03-10 22:52:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:32,312 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2021-03-10 22:52:32,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2021-03-10 22:52:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:32,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:32,318 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:32,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:52:32,319 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash 860248502, now seen corresponding path program 2 times [2021-03-10 22:52:32,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:32,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471537386] [2021-03-10 22:52:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:32,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471537386] [2021-03-10 22:52:32,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:32,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:52:32,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205188586] [2021-03-10 22:52:32,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:52:32,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:32,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:52:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:32,461 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:32,606 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2021-03-10 22:52:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 22:52:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:32,619 INFO L225 Difference]: With dead ends: 2435 [2021-03-10 22:52:32,619 INFO L226 Difference]: Without dead ends: 1497 [2021-03-10 22:52:32,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-03-10 22:52:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2021-03-10 22:52:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-03-10 22:52:32,662 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-03-10 22:52:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:32,662 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-03-10 22:52:32,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-03-10 22:52:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:32,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:32,666 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:32,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:52:32,666 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-03-10 22:52:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:32,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263704391] [2021-03-10 22:52:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:32,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263704391] [2021-03-10 22:52:32,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:32,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:52:32,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989748879] [2021-03-10 22:52:32,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:52:32,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:32,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:52:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:32,729 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:32,845 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-03-10 22:52:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 22:52:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:32,862 INFO L225 Difference]: With dead ends: 3289 [2021-03-10 22:52:32,863 INFO L226 Difference]: Without dead ends: 2391 [2021-03-10 22:52:32,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-03-10 22:52:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-03-10 22:52:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-03-10 22:52:32,908 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-03-10 22:52:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:32,913 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-03-10 22:52:32,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-03-10 22:52:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:32,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:32,917 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:32,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:52:32,917 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:32,918 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-03-10 22:52:32,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:32,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460896309] [2021-03-10 22:52:32,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:32,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460896309] [2021-03-10 22:52:32,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:32,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:32,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049828199] [2021-03-10 22:52:32,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:32,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:32,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:32,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:32,968 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:32,997 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-03-10 22:52:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 22:52:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:33,002 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 22:52:33,003 INFO L226 Difference]: Without dead ends: 830 [2021-03-10 22:52:33,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-10 22:52:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-03-10 22:52:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-03-10 22:52:33,030 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-03-10 22:52:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:33,031 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-03-10 22:52:33,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-03-10 22:52:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:33,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:33,034 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:33,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:52:33,034 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1603494326, now seen corresponding path program 1 times [2021-03-10 22:52:33,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:33,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553936266] [2021-03-10 22:52:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553936266] [2021-03-10 22:52:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131597303] [2021-03-10 22:52:33,118 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 [2021-03-10 22:52:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:52:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:33,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:33,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 22:52:33,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449487866] [2021-03-10 22:52:33,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:33,296 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:33,356 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-03-10 22:52:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:52:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:52:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:33,366 INFO L225 Difference]: With dead ends: 1914 [2021-03-10 22:52:33,366 INFO L226 Difference]: Without dead ends: 1914 [2021-03-10 22:52:33,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-03-10 22:52:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-03-10 22:52:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-03-10 22:52:33,407 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-03-10 22:52:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:33,407 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-03-10 22:52:33,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-03-10 22:52:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:33,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:33,411 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:33,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:33,627 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash 808417752, now seen corresponding path program 1 times [2021-03-10 22:52:33,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:33,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661875330] [2021-03-10 22:52:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:33,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661875330] [2021-03-10 22:52:33,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:33,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:33,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6859978] [2021-03-10 22:52:33,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:33,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:33,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:33,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:33,652 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:33,691 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-03-10 22:52:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:33,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:52:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:33,699 INFO L225 Difference]: With dead ends: 1486 [2021-03-10 22:52:33,699 INFO L226 Difference]: Without dead ends: 1456 [2021-03-10 22:52:33,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-03-10 22:52:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-03-10 22:52:33,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-03-10 22:52:33,738 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-03-10 22:52:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:33,739 INFO L480 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-03-10 22:52:33,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-03-10 22:52:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:33,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:33,743 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:33,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 22:52:33,744 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:33,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1237283624, now seen corresponding path program 1 times [2021-03-10 22:52:33,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:33,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970829414] [2021-03-10 22:52:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:33,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970829414] [2021-03-10 22:52:33,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:33,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:33,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268362973] [2021-03-10 22:52:33,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:33,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:33,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:33,768 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:33,819 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2021-03-10 22:52:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:52:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:33,829 INFO L225 Difference]: With dead ends: 1766 [2021-03-10 22:52:33,829 INFO L226 Difference]: Without dead ends: 1644 [2021-03-10 22:52:33,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:33,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-03-10 22:52:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2021-03-10 22:52:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2021-03-10 22:52:33,876 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2021-03-10 22:52:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:33,877 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2021-03-10 22:52:33,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2021-03-10 22:52:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:33,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:33,883 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:33,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:52:33,883 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1327684600, now seen corresponding path program 2 times [2021-03-10 22:52:33,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:33,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889230211] [2021-03-10 22:52:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889230211] [2021-03-10 22:52:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635215262] [2021-03-10 22:52:33,986 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 [2021-03-10 22:52:34,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:34,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:34,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:52:34,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:34,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:34,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-03-10 22:52:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417352878] [2021-03-10 22:52:34,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:52:34,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:52:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:34,109 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-03-10 22:52:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:34,998 INFO L93 Difference]: Finished difference Result 6173 states and 21367 transitions. [2021-03-10 22:52:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 22:52:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) Word has length 25 [2021-03-10 22:52:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:35,036 INFO L225 Difference]: With dead ends: 6173 [2021-03-10 22:52:35,036 INFO L226 Difference]: Without dead ends: 3187 [2021-03-10 22:52:35,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:52:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-03-10 22:52:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1397. [2021-03-10 22:52:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.4978510028653296) internal successors, (4883), 1396 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4883 transitions. [2021-03-10 22:52:35,103 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4883 transitions. Word has length 25 [2021-03-10 22:52:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:35,103 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4883 transitions. [2021-03-10 22:52:35,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-03-10 22:52:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4883 transitions. [2021-03-10 22:52:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:35,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:35,108 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:35,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:35,331 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash 566728726, now seen corresponding path program 2 times [2021-03-10 22:52:35,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:35,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647069608] [2021-03-10 22:52:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:35,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647069608] [2021-03-10 22:52:35,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:35,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:35,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6513003] [2021-03-10 22:52:35,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:35,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:35,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:35,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:35,361 INFO L87 Difference]: Start difference. First operand 1397 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:35,411 INFO L93 Difference]: Finished difference Result 1523 states and 5204 transitions. [2021-03-10 22:52:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:52:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:35,423 INFO L225 Difference]: With dead ends: 1523 [2021-03-10 22:52:35,423 INFO L226 Difference]: Without dead ends: 1424 [2021-03-10 22:52:35,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-03-10 22:52:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1302. [2021-03-10 22:52:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.504227517294389) internal successors, (4559), 1301 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4559 transitions. [2021-03-10 22:52:35,463 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4559 transitions. Word has length 25 [2021-03-10 22:52:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:35,463 INFO L480 AbstractCegarLoop]: Abstraction has 1302 states and 4559 transitions. [2021-03-10 22:52:35,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4559 transitions. [2021-03-10 22:52:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:35,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:35,469 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:35,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 22:52:35,470 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1313441110, now seen corresponding path program 3 times [2021-03-10 22:52:35,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:35,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436275413] [2021-03-10 22:52:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:35,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436275413] [2021-03-10 22:52:35,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129874485] [2021-03-10 22:52:35,520 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 [2021-03-10 22:52:35,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:52:35,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:52:35,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:35,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:35,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 22:52:35,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643190540] [2021-03-10 22:52:35,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:35,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:35,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:35,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:35,611 INFO L87 Difference]: Start difference. First operand 1302 states and 4559 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:35,663 INFO L93 Difference]: Finished difference Result 1384 states and 4841 transitions. [2021-03-10 22:52:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:52:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:52:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:35,669 INFO L225 Difference]: With dead ends: 1384 [2021-03-10 22:52:35,670 INFO L226 Difference]: Without dead ends: 1282 [2021-03-10 22:52:35,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-03-10 22:52:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-03-10 22:52:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5167785234899327) internal successors, (3668), 1043 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3668 transitions. [2021-03-10 22:52:35,700 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3668 transitions. Word has length 25 [2021-03-10 22:52:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:35,701 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 3668 transitions. [2021-03-10 22:52:35,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3668 transitions. [2021-03-10 22:52:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:52:35,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:35,704 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:35,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:52:35,927 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash -873778054, now seen corresponding path program 1 times [2021-03-10 22:52:35,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:35,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671803228] [2021-03-10 22:52:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:36,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671803228] [2021-03-10 22:52:36,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11600364] [2021-03-10 22:52:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:36,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:52:36,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:36,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-03-10 22:52:36,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:36,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:36,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:36,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-03-10 22:52:36,290 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 13 treesize of output 9 [2021-03-10 22:52:36,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:36,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:36,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:36,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-03-10 22:52:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:36,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:36,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 22:52:36,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271664735] [2021-03-10 22:52:36,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:52:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:52:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:36,321 INFO L87 Difference]: Start difference. First operand 1044 states and 3668 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:36,547 INFO L93 Difference]: Finished difference Result 2466 states and 8751 transitions. [2021-03-10 22:52:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:52:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:52:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:36,554 INFO L225 Difference]: With dead ends: 2466 [2021-03-10 22:52:36,554 INFO L226 Difference]: Without dead ends: 1631 [2021-03-10 22:52:36,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:52:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-03-10 22:52:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1283. [2021-03-10 22:52:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.4672386895475817) internal successors, (4445), 1282 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4445 transitions. [2021-03-10 22:52:36,598 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4445 transitions. Word has length 29 [2021-03-10 22:52:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:36,600 INFO L480 AbstractCegarLoop]: Abstraction has 1283 states and 4445 transitions. [2021-03-10 22:52:36,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4445 transitions. [2021-03-10 22:52:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:52:36,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:36,617 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:36,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:36,818 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:36,819 INFO L82 PathProgramCache]: Analyzing trace with hash -22453128, now seen corresponding path program 2 times [2021-03-10 22:52:36,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:36,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933621890] [2021-03-10 22:52:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:36,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933621890] [2021-03-10 22:52:36,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221819027] [2021-03-10 22:52:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:52:36,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:36,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:52:36,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:36,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-03-10 22:52:36,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:36,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:36,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:36,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-03-10 22:52:37,046 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 [2021-03-10 22:52:37,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:37,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:37,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:37,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 22:52:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:37,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:37,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 22:52:37,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693798740] [2021-03-10 22:52:37,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:52:37,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:37,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:52:37,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:52:37,067 INFO L87 Difference]: Start difference. First operand 1283 states and 4445 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:37,351 INFO L93 Difference]: Finished difference Result 2852 states and 10126 transitions. [2021-03-10 22:52:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:52:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:52:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:37,355 INFO L225 Difference]: With dead ends: 2852 [2021-03-10 22:52:37,355 INFO L226 Difference]: Without dead ends: 1150 [2021-03-10 22:52:37,356 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:52:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-03-10 22:52:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 753. [2021-03-10 22:52:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.466755319148936) internal successors, (2607), 752 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2607 transitions. [2021-03-10 22:52:37,378 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2607 transitions. Word has length 29 [2021-03-10 22:52:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:37,379 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 2607 transitions. [2021-03-10 22:52:37,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2607 transitions. [2021-03-10 22:52:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:52:37,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:37,382 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:37,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 22:52:37,600 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1929474972, now seen corresponding path program 3 times [2021-03-10 22:52:37,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:37,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83675266] [2021-03-10 22:52:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:37,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83675266] [2021-03-10 22:52:37,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963563434] [2021-03-10 22:52:37,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:37,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:52:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:52:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:37,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:37,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 22:52:37,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883015635] [2021-03-10 22:52:37,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:52:37,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:37,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:52:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:37,768 INFO L87 Difference]: Start difference. First operand 753 states and 2607 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:38,225 INFO L93 Difference]: Finished difference Result 2449 states and 8696 transitions. [2021-03-10 22:52:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:52:38,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 22:52:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:38,234 INFO L225 Difference]: With dead ends: 2449 [2021-03-10 22:52:38,234 INFO L226 Difference]: Without dead ends: 2435 [2021-03-10 22:52:38,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:52:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-03-10 22:52:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1458. [2021-03-10 22:52:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.723404255319149) internal successors, (5425), 1457 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5425 transitions. [2021-03-10 22:52:38,291 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5425 transitions. Word has length 31 [2021-03-10 22:52:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:38,291 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 5425 transitions. [2021-03-10 22:52:38,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5425 transitions. [2021-03-10 22:52:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:52:38,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:38,296 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:38,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:38,511 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 215625022, now seen corresponding path program 4 times [2021-03-10 22:52:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:38,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408534579] [2021-03-10 22:52:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408534579] [2021-03-10 22:52:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058079433] [2021-03-10 22:52:38,539 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 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 [2021-03-10 22:52:38,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:52:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:52:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:38,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:38,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:52:38,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245746227] [2021-03-10 22:52:38,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:38,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:38,656 INFO L87 Difference]: Start difference. First operand 1458 states and 5425 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-03-10 22:52:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:38,734 INFO L93 Difference]: Finished difference Result 3104 states and 11373 transitions. [2021-03-10 22:52:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:52:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:52:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:38,744 INFO L225 Difference]: With dead ends: 3104 [2021-03-10 22:52:38,744 INFO L226 Difference]: Without dead ends: 3100 [2021-03-10 22:52:38,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:52:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-03-10 22:52:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1644. [2021-03-10 22:52:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.837492391965916) internal successors, (6305), 1643 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 6305 transitions. [2021-03-10 22:52:38,801 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 6305 transitions. Word has length 33 [2021-03-10 22:52:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:38,801 INFO L480 AbstractCegarLoop]: Abstraction has 1644 states and 6305 transitions. [2021-03-10 22:52:38,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-03-10 22:52:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 6305 transitions. [2021-03-10 22:52:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:52:38,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:38,805 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:39,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:52:39,027 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:39,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1617454150, now seen corresponding path program 5 times [2021-03-10 22:52:39,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:39,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588659479] [2021-03-10 22:52:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:39,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588659479] [2021-03-10 22:52:39,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881978505] [2021-03-10 22:52:39,059 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 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 [2021-03-10 22:52:39,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:52:39,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:52:39,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:39,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:39,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:52:39,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338230714] [2021-03-10 22:52:39,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:39,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:39,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:39,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:39,139 INFO L87 Difference]: Start difference. First operand 1644 states and 6305 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-03-10 22:52:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:39,206 INFO L93 Difference]: Finished difference Result 3039 states and 11040 transitions. [2021-03-10 22:52:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:52:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:39,216 INFO L225 Difference]: With dead ends: 3039 [2021-03-10 22:52:39,216 INFO L226 Difference]: Without dead ends: 3039 [2021-03-10 22:52:39,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-03-10 22:52:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1619. [2021-03-10 22:52:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.857849196538937) internal successors, (6242), 1618 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 6242 transitions. [2021-03-10 22:52:39,267 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 6242 transitions. Word has length 33 [2021-03-10 22:52:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:39,267 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 6242 transitions. [2021-03-10 22:52:39,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-03-10 22:52:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 6242 transitions. [2021-03-10 22:52:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:52:39,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:39,271 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:39,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:52:39,494 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash -461930502, now seen corresponding path program 6 times [2021-03-10 22:52:39,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:39,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219868541] [2021-03-10 22:52:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:39,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219868541] [2021-03-10 22:52:39,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910172114] [2021-03-10 22:52:39,536 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 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 [2021-03-10 22:52:39,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:52:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:39,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:52:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:39,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:39,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 22:52:39,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555484223] [2021-03-10 22:52:39,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:52:39,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:39,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:52:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:39,685 INFO L87 Difference]: Start difference. First operand 1619 states and 6242 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:40,282 INFO L93 Difference]: Finished difference Result 7858 states and 29355 transitions. [2021-03-10 22:52:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:52:40,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:52:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:40,307 INFO L225 Difference]: With dead ends: 7858 [2021-03-10 22:52:40,308 INFO L226 Difference]: Without dead ends: 7378 [2021-03-10 22:52:40,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:52:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-03-10 22:52:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3747. [2021-03-10 22:52:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 4.203150026695141) internal successors, (15745), 3746 states have internal predecessors, (15745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 15745 transitions. [2021-03-10 22:52:40,453 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 15745 transitions. Word has length 33 [2021-03-10 22:52:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:40,453 INFO L480 AbstractCegarLoop]: Abstraction has 3747 states and 15745 transitions. [2021-03-10 22:52:40,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 15745 transitions. [2021-03-10 22:52:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:52:40,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:40,463 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:40,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 22:52:40,679 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:40,680 INFO L82 PathProgramCache]: Analyzing trace with hash 685612088, now seen corresponding path program 7 times [2021-03-10 22:52:40,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:40,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359193312] [2021-03-10 22:52:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:40,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359193312] [2021-03-10 22:52:40,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966451895] [2021-03-10 22:52:40,714 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:52:40,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:40,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:40,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:52:40,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300405886] [2021-03-10 22:52:40,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:40,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:40,801 INFO L87 Difference]: Start difference. First operand 3747 states and 15745 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:40,891 INFO L93 Difference]: Finished difference Result 5515 states and 21821 transitions. [2021-03-10 22:52:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:40,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:52:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:40,904 INFO L225 Difference]: With dead ends: 5515 [2021-03-10 22:52:40,905 INFO L226 Difference]: Without dead ends: 5515 [2021-03-10 22:52:40,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2021-03-10 22:52:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3848. [2021-03-10 22:52:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.193137509747856) internal successors, (16131), 3847 states have internal predecessors, (16131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16131 transitions. [2021-03-10 22:52:41,027 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16131 transitions. Word has length 33 [2021-03-10 22:52:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:41,028 INFO L480 AbstractCegarLoop]: Abstraction has 3848 states and 16131 transitions. [2021-03-10 22:52:41,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16131 transitions. [2021-03-10 22:52:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:52:41,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:41,039 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:41,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:52:41,262 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:41,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:41,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1338680964, now seen corresponding path program 8 times [2021-03-10 22:52:41,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:41,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323649305] [2021-03-10 22:52:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:41,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323649305] [2021-03-10 22:52:41,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817635197] [2021-03-10 22:52:41,300 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 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 [2021-03-10 22:52:41,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:52:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:41,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:41,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:52:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857632180] [2021-03-10 22:52:41,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:41,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:41,424 INFO L87 Difference]: Start difference. First operand 3848 states and 16131 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:41,523 INFO L93 Difference]: Finished difference Result 5599 states and 22264 transitions. [2021-03-10 22:52:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:52:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:41,535 INFO L225 Difference]: With dead ends: 5599 [2021-03-10 22:52:41,535 INFO L226 Difference]: Without dead ends: 5599 [2021-03-10 22:52:41,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-03-10 22:52:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 4158. [2021-03-10 22:52:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.1554005292278084) internal successors, (17274), 4157 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17274 transitions. [2021-03-10 22:52:41,670 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17274 transitions. Word has length 33 [2021-03-10 22:52:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:41,670 INFO L480 AbstractCegarLoop]: Abstraction has 4158 states and 17274 transitions. [2021-03-10 22:52:41,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17274 transitions. [2021-03-10 22:52:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:52:41,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:41,680 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:41,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:52:41,881 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1085770464, now seen corresponding path program 9 times [2021-03-10 22:52:41,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:41,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596637498] [2021-03-10 22:52:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:52:42,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596637498] [2021-03-10 22:52:42,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414317821] [2021-03-10 22:52:42,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:42,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:52:42,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:52:42,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:42,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:42,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-03-10 22:52:42,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:42,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-03-10 22:52:42,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:42,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:42,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:52:42,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-03-10 22:52:42,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-03-10 22:52:42,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:42,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:42,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-03-10 22:52:42,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:42,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:42,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:52:42,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:43 [2021-03-10 22:52:42,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-03-10 22:52:42,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:42,660 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.0 percent of original size [2021-03-10 22:52:42,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:52:42,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:42,670 INFO L628 ElimStorePlain]: treesize reduction 6, result has 45.5 percent of original size [2021-03-10 22:52:42,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:42,671 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:5 [2021-03-10 22:52:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:42,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:42,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 17 [2021-03-10 22:52:42,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003172667] [2021-03-10 22:52:42,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:52:42,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:42,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:52:42,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:52:42,687 INFO L87 Difference]: Start difference. First operand 4158 states and 17274 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:43,771 INFO L93 Difference]: Finished difference Result 9317 states and 38403 transitions. [2021-03-10 22:52:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:52:43,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:52:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:43,781 INFO L225 Difference]: With dead ends: 9317 [2021-03-10 22:52:43,781 INFO L226 Difference]: Without dead ends: 4302 [2021-03-10 22:52:43,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 739.0ms TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:52:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-03-10 22:52:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 4250. [2021-03-10 22:52:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 4.120498940927277) internal successors, (17508), 4249 states have internal predecessors, (17508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 17508 transitions. [2021-03-10 22:52:43,903 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 17508 transitions. Word has length 35 [2021-03-10 22:52:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:43,903 INFO L480 AbstractCegarLoop]: Abstraction has 4250 states and 17508 transitions. [2021-03-10 22:52:43,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 17508 transitions. [2021-03-10 22:52:43,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:52:43,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:43,915 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:44,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:44,138 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash -436856958, now seen corresponding path program 10 times [2021-03-10 22:52:44,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:44,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209946777] [2021-03-10 22:52:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:44,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209946777] [2021-03-10 22:52:44,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340911667] [2021-03-10 22:52:44,290 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 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 [2021-03-10 22:52:44,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:52:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:52:44,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:44,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-03-10 22:52:44,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:44,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-03-10 22:52:44,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:44,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:44,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:52:44,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:39 [2021-03-10 22:52:44,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:52:44,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:44,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 22:52:44,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:44,648 INFO L628 ElimStorePlain]: treesize reduction 23, result has 11.5 percent of original size [2021-03-10 22:52:44,649 INFO L518 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2021-03-10 22:52:44,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:44,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:3 [2021-03-10 22:52:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:44,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:44,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 22:52:44,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111834959] [2021-03-10 22:52:44,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:52:44,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:52:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:52:44,668 INFO L87 Difference]: Start difference. First operand 4250 states and 17508 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:45,403 INFO L93 Difference]: Finished difference Result 9382 states and 37522 transitions. [2021-03-10 22:52:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:52:45,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:52:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:45,417 INFO L225 Difference]: With dead ends: 9382 [2021-03-10 22:52:45,417 INFO L226 Difference]: Without dead ends: 4508 [2021-03-10 22:52:45,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:52:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-03-10 22:52:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4326. [2021-03-10 22:52:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 4.0920231213872835) internal successors, (17698), 4325 states have internal predecessors, (17698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 17698 transitions. [2021-03-10 22:52:45,525 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 17698 transitions. Word has length 35 [2021-03-10 22:52:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:45,526 INFO L480 AbstractCegarLoop]: Abstraction has 4326 states and 17698 transitions. [2021-03-10 22:52:45,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 17698 transitions. [2021-03-10 22:52:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:52:45,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:45,538 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:45,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 22:52:45,760 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:45,760 INFO L82 PathProgramCache]: Analyzing trace with hash 804357182, now seen corresponding path program 11 times [2021-03-10 22:52:45,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:45,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302200593] [2021-03-10 22:52:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:45,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302200593] [2021-03-10 22:52:45,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111404522] [2021-03-10 22:52:45,804 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 [2021-03-10 22:52:45,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:52:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:52:45,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:45,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 22:52:45,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126136207] [2021-03-10 22:52:45,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:45,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:45,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:45,904 INFO L87 Difference]: Start difference. First operand 4326 states and 17698 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:46,014 INFO L93 Difference]: Finished difference Result 6092 states and 23684 transitions. [2021-03-10 22:52:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:52:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:46,032 INFO L225 Difference]: With dead ends: 6092 [2021-03-10 22:52:46,032 INFO L226 Difference]: Without dead ends: 6080 [2021-03-10 22:52:46,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2021-03-10 22:52:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 4576. [2021-03-10 22:52:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.078032786885246) internal successors, (18657), 4575 states have internal predecessors, (18657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18657 transitions. [2021-03-10 22:52:46,173 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18657 transitions. Word has length 37 [2021-03-10 22:52:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:46,173 INFO L480 AbstractCegarLoop]: Abstraction has 4576 states and 18657 transitions. [2021-03-10 22:52:46,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18657 transitions. [2021-03-10 22:52:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:52:46,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:46,186 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:46,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:46,399 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 550256378, now seen corresponding path program 12 times [2021-03-10 22:52:46,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:46,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707286786] [2021-03-10 22:52:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:46,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707286786] [2021-03-10 22:52:46,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089105659] [2021-03-10 22:52:46,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:52:46,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:52:46,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:46,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:46,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 22:52:46,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496804614] [2021-03-10 22:52:46,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:46,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:46,544 INFO L87 Difference]: Start difference. First operand 4576 states and 18657 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:46,694 INFO L93 Difference]: Finished difference Result 9156 states and 35918 transitions. [2021-03-10 22:52:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:52:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:52:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:46,713 INFO L225 Difference]: With dead ends: 9156 [2021-03-10 22:52:46,713 INFO L226 Difference]: Without dead ends: 9136 [2021-03-10 22:52:46,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-03-10 22:52:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 5812. [2021-03-10 22:52:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 4.22715539494063) internal successors, (24564), 5811 states have internal predecessors, (24564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 24564 transitions. [2021-03-10 22:52:46,894 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 24564 transitions. Word has length 37 [2021-03-10 22:52:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:46,894 INFO L480 AbstractCegarLoop]: Abstraction has 5812 states and 24564 transitions. [2021-03-10 22:52:46,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 24564 transitions. [2021-03-10 22:52:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:52:46,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:46,909 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:47,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:52:47,132 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1282822794, now seen corresponding path program 13 times [2021-03-10 22:52:47,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:47,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753594186] [2021-03-10 22:52:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:47,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753594186] [2021-03-10 22:52:47,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872180078] [2021-03-10 22:52:47,169 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 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 [2021-03-10 22:52:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:47,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:47,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 22:52:47,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086448970] [2021-03-10 22:52:47,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:47,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:47,278 INFO L87 Difference]: Start difference. First operand 5812 states and 24564 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:47,421 INFO L93 Difference]: Finished difference Result 9442 states and 37337 transitions. [2021-03-10 22:52:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:52:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:52:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:47,447 INFO L225 Difference]: With dead ends: 9442 [2021-03-10 22:52:47,447 INFO L226 Difference]: Without dead ends: 9442 [2021-03-10 22:52:47,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-03-10 22:52:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 5125. [2021-03-10 22:52:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 4.132708821233411) internal successors, (21176), 5124 states have internal predecessors, (21176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 21176 transitions. [2021-03-10 22:52:47,685 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 21176 transitions. Word has length 37 [2021-03-10 22:52:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:47,685 INFO L480 AbstractCegarLoop]: Abstraction has 5125 states and 21176 transitions. [2021-03-10 22:52:47,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 21176 transitions. [2021-03-10 22:52:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:52:47,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:47,700 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:47,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:47,903 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:47,904 INFO L82 PathProgramCache]: Analyzing trace with hash 987851450, now seen corresponding path program 14 times [2021-03-10 22:52:47,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:47,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993962942] [2021-03-10 22:52:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:47,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993962942] [2021-03-10 22:52:47,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504770353] [2021-03-10 22:52:47,941 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:47,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:48,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:48,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:48,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 22:52:48,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375131220] [2021-03-10 22:52:48,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:52:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:48,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:52:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:52:48,111 INFO L87 Difference]: Start difference. First operand 5125 states and 21176 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:48,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:48,258 INFO L93 Difference]: Finished difference Result 8511 states and 32921 transitions. [2021-03-10 22:52:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:52:48,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:52:48,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:48,276 INFO L225 Difference]: With dead ends: 8511 [2021-03-10 22:52:48,276 INFO L226 Difference]: Without dead ends: 8511 [2021-03-10 22:52:48,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:52:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-03-10 22:52:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4053. [2021-03-10 22:52:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 4.028874629812439) internal successors, (16325), 4052 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 16325 transitions. [2021-03-10 22:52:48,395 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 16325 transitions. Word has length 37 [2021-03-10 22:52:48,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:48,395 INFO L480 AbstractCegarLoop]: Abstraction has 4053 states and 16325 transitions. [2021-03-10 22:52:48,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 16325 transitions. [2021-03-10 22:52:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:52:48,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:48,402 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:48,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 22:52:48,603 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:48,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1447205570, now seen corresponding path program 15 times [2021-03-10 22:52:48,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:48,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114010790] [2021-03-10 22:52:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:48,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114010790] [2021-03-10 22:52:48,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639536707] [2021-03-10 22:52:48,653 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 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 [2021-03-10 22:52:48,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:52:48,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:52:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:52:48,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:48,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 22:52:48,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541636480] [2021-03-10 22:52:48,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:52:48,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:52:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:52:48,822 INFO L87 Difference]: Start difference. First operand 4053 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:49,884 INFO L93 Difference]: Finished difference Result 11628 states and 44736 transitions. [2021-03-10 22:52:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 22:52:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:52:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:49,909 INFO L225 Difference]: With dead ends: 11628 [2021-03-10 22:52:49,909 INFO L226 Difference]: Without dead ends: 11024 [2021-03-10 22:52:49,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 700.1ms TimeCoverageRelationStatistics Valid=1036, Invalid=3520, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 22:52:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2021-03-10 22:52:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 5085. [2021-03-10 22:52:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.030881195908734) internal successors, (20493), 5084 states have internal predecessors, (20493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 20493 transitions. [2021-03-10 22:52:50,121 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 20493 transitions. Word has length 37 [2021-03-10 22:52:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:50,122 INFO L480 AbstractCegarLoop]: Abstraction has 5085 states and 20493 transitions. [2021-03-10 22:52:50,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 20493 transitions. [2021-03-10 22:52:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:52:50,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:50,134 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:50,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 22:52:50,334 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:50,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2010083624, now seen corresponding path program 16 times [2021-03-10 22:52:50,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:50,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916168442] [2021-03-10 22:52:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:52:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916168442] [2021-03-10 22:52:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955039402] [2021-03-10 22:52:50,394 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:50,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:52:50,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:52:50,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:50,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 22:52:50,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26175827] [2021-03-10 22:52:50,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:52:50,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:50,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:52:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:50,508 INFO L87 Difference]: Start difference. First operand 5085 states and 20493 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:50,731 INFO L93 Difference]: Finished difference Result 12069 states and 47387 transitions. [2021-03-10 22:52:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:52:50,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 22:52:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:50,767 INFO L225 Difference]: With dead ends: 12069 [2021-03-10 22:52:50,767 INFO L226 Difference]: Without dead ends: 12069 [2021-03-10 22:52:50,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:52:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2021-03-10 22:52:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 8160. [2021-03-10 22:52:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 4.160804020100502) internal successors, (33948), 8159 states have internal predecessors, (33948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 33948 transitions. [2021-03-10 22:52:51,010 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 33948 transitions. Word has length 39 [2021-03-10 22:52:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:51,010 INFO L480 AbstractCegarLoop]: Abstraction has 8160 states and 33948 transitions. [2021-03-10 22:52:51,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 33948 transitions. [2021-03-10 22:52:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:52:51,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:51,028 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:51,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 22:52:51,228 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash -657746618, now seen corresponding path program 17 times [2021-03-10 22:52:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097442422] [2021-03-10 22:52:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-03-10 22:52:51,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097442422] [2021-03-10 22:52:51,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069525339] [2021-03-10 22:52:51,277 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:51,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:52:51,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:52:51,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:52:51,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:51,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 22:52:51,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002038708] [2021-03-10 22:52:51,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:52:51,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:52:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:52:51,434 INFO L87 Difference]: Start difference. First operand 8160 states and 33948 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:52,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:52,886 INFO L93 Difference]: Finished difference Result 26614 states and 103468 transitions. [2021-03-10 22:52:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 22:52:52,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:52:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:52,963 INFO L225 Difference]: With dead ends: 26614 [2021-03-10 22:52:52,963 INFO L226 Difference]: Without dead ends: 25436 [2021-03-10 22:52:52,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 887.9ms TimeCoverageRelationStatistics Valid=1482, Invalid=5658, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 22:52:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25436 states. [2021-03-10 22:52:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25436 to 15198. [2021-03-10 22:52:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15198 states, 15197 states have (on average 4.284727248799105) internal successors, (65115), 15197 states have internal predecessors, (65115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15198 states to 15198 states and 65115 transitions. [2021-03-10 22:52:53,586 INFO L78 Accepts]: Start accepts. Automaton has 15198 states and 65115 transitions. Word has length 41 [2021-03-10 22:52:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:53,587 INFO L480 AbstractCegarLoop]: Abstraction has 15198 states and 65115 transitions. [2021-03-10 22:52:53,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 15198 states and 65115 transitions. [2021-03-10 22:52:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:52:53,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:53,624 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:53,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 22:52:53,827 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash -869101180, now seen corresponding path program 18 times [2021-03-10 22:52:53,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:53,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236225310] [2021-03-10 22:52:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:52:53,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236225310] [2021-03-10 22:52:53,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538936750] [2021-03-10 22:52:53,871 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 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 [2021-03-10 22:52:53,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:52:53,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:52:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-03-10 22:52:54,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:54,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-10 22:52:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302462911] [2021-03-10 22:52:54,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:52:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:52:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:52:54,013 INFO L87 Difference]: Start difference. First operand 15198 states and 65115 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:55,235 INFO L93 Difference]: Finished difference Result 62455 states and 251410 transitions. [2021-03-10 22:52:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:52:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:52:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:55,620 INFO L225 Difference]: With dead ends: 62455 [2021-03-10 22:52:55,620 INFO L226 Difference]: Without dead ends: 62455 [2021-03-10 22:52:55,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:52:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62455 states. [2021-03-10 22:52:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62455 to 31961. [2021-03-10 22:52:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31961 states, 31960 states have (on average 4.464518147684606) internal successors, (142686), 31960 states have internal predecessors, (142686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31961 states to 31961 states and 142686 transitions. [2021-03-10 22:52:57,200 INFO L78 Accepts]: Start accepts. Automaton has 31961 states and 142686 transitions. Word has length 41 [2021-03-10 22:52:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:57,200 INFO L480 AbstractCegarLoop]: Abstraction has 31961 states and 142686 transitions. [2021-03-10 22:52:57,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 31961 states and 142686 transitions. [2021-03-10 22:52:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:52:57,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:57,278 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:57,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:57,491 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:57,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1576576382, now seen corresponding path program 19 times [2021-03-10 22:52:57,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:57,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014530812] [2021-03-10 22:52:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:57,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014530812] [2021-03-10 22:52:57,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448884655] [2021-03-10 22:52:57,977 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 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 [2021-03-10 22:52:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:52:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:58,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-03-10 22:52:58,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:58,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:58,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:58,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-03-10 22:52:58,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,354 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-03-10 22:52:58,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 38 [2021-03-10 22:52:58,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,388 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-03-10 22:52:58,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 38 [2021-03-10 22:52:58,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 22:52:58,537 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 22:52:58,537 INFO L628 ElimStorePlain]: treesize reduction 25, result has 77.7 percent of original size [2021-03-10 22:52:58,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 22:52:58,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:80 [2021-03-10 22:52:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-03-10 22:52:58,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:58,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,910 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-03-10 22:52:58,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 38 [2021-03-10 22:52:58,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:58,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,935 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 22:52:58,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2021-03-10 22:52:58,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2021-03-10 22:52:58,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:58,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:58,986 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-03-10 22:52:58,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 38 [2021-03-10 22:52:58,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-03-10 22:52:59,149 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-10 22:52:59,150 INFO L628 ElimStorePlain]: treesize reduction 25, result has 86.3 percent of original size [2021-03-10 22:52:59,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 5 xjuncts. [2021-03-10 22:52:59,176 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:172, output treesize:126 [2021-03-10 22:53:03,013 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-03-10 22:53:04,478 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_20, v_prenex_25, v_prenex_17], 10=[A]} [2021-03-10 22:53:04,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:53:04,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-03-10 22:53:04,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 22:53:04,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:53:04,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:53:04,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:53:04,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:53:04,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 22:53:04,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:53:04,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:53:04,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 39 [2021-03-10 22:53:04,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 22:53:04,931 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-03-10 22:53:04,932 INFO L628 ElimStorePlain]: treesize reduction 25, result has 87.0 percent of original size [2021-03-10 22:53:04,961 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-10 22:53:04,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-03-10 22:53:04,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:53:04,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:53:04,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:53:04,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 31 [2021-03-10 22:53:05,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:53:05,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:53:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-03-10 22:53:05,045 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-03-10 22:53:05,136 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.2 percent of original size [2021-03-10 22:53:05,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:53:05,141 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 14 variables, input treesize:159, output treesize:9 [2021-03-10 22:53:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:53:05,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:05,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-03-10 22:53:05,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508713679] [2021-03-10 22:53:05,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:53:05,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:53:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:53:05,157 INFO L87 Difference]: Start difference. First operand 31961 states and 142686 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:31,011 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:53:51,408 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:53:55,581 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-10 22:54:10,213 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 22:54:27,003 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-03-10 22:54:57,518 WARN L205 SmtUtils]: Spent 20.21 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-10 22:55:09,726 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-03-10 22:55:20,184 WARN L205 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-10 22:55:47,052 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-03-10 22:55:53,308 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-03-10 22:55:55,487 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-03-10 22:56:16,779 WARN L205 SmtUtils]: Spent 15.06 s on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-03-10 22:56:17,128 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-10 22:56:35,994 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-03-10 22:56:36,167 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-10 22:56:46,511 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-03-10 22:57:01,751 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-03-10 22:57:02,869 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-03-10 22:57:13,296 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-03-10 22:57:27,586 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-03-10 22:57:27,777 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2021-03-10 22:57:34,244 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-03-10 22:57:34,554 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-03-10 22:57:58,034 WARN L205 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-03-10 22:58:33,567 WARN L205 SmtUtils]: Spent 14.77 s on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2021-03-10 22:58:34,276 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-03-10 22:58:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:59,839 INFO L93 Difference]: Finished difference Result 71243 states and 312845 transitions. [2021-03-10 22:58:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 22:58:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:58:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:59,900 INFO L225 Difference]: With dead ends: 71243 [2021-03-10 22:58:59,900 INFO L226 Difference]: Without dead ends: 24194 [2021-03-10 22:58:59,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 248677.8ms TimeCoverageRelationStatistics Valid=895, Invalid=3066, Unknown=71, NotChecked=0, Total=4032 [2021-03-10 22:58:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24194 states. [2021-03-10 22:59:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24194 to 24194. [2021-03-10 22:59:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24194 states, 24193 states have (on average 4.4164014384326045) internal successors, (106846), 24193 states have internal predecessors, (106846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24194 states to 24194 states and 106846 transitions. [2021-03-10 22:59:00,574 INFO L78 Accepts]: Start accepts. Automaton has 24194 states and 106846 transitions. Word has length 41 [2021-03-10 22:59:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:00,574 INFO L480 AbstractCegarLoop]: Abstraction has 24194 states and 106846 transitions. [2021-03-10 22:59:00,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 24194 states and 106846 transitions. [2021-03-10 22:59:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:00,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:00,620 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:00,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:00,823 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash 579617674, now seen corresponding path program 20 times [2021-03-10 22:59:00,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:00,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292539513] [2021-03-10 22:59:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:59:01,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292539513] [2021-03-10 22:59:01,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038850520] [2021-03-10 22:59:01,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:01,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:59:01,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:59:01,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:59:01,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:01,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 22:59:01,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472687710] [2021-03-10 22:59:01,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:59:01,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:59:01,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:59:01,199 INFO L87 Difference]: Start difference. First operand 24194 states and 106846 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-03-10 22:59:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:01,572 INFO L93 Difference]: Finished difference Result 31728 states and 133271 transitions. [2021-03-10 22:59:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:59:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:01,662 INFO L225 Difference]: With dead ends: 31728 [2021-03-10 22:59:01,662 INFO L226 Difference]: Without dead ends: 31708 [2021-03-10 22:59:01,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:59:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31708 states. [2021-03-10 22:59:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31708 to 20545. [2021-03-10 22:59:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338492990654205) internal successors, (89130), 20544 states have internal predecessors, (89130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89130 transitions. [2021-03-10 22:59:02,282 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89130 transitions. Word has length 43 [2021-03-10 22:59:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:02,282 INFO L480 AbstractCegarLoop]: Abstraction has 20545 states and 89130 transitions. [2021-03-10 22:59:02,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-03-10 22:59:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89130 transitions. [2021-03-10 22:59:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:02,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:02,323 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:02,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:02,525 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 856538626, now seen corresponding path program 21 times [2021-03-10 22:59:02,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:02,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224888939] [2021-03-10 22:59:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-03-10 22:59:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224888939] [2021-03-10 22:59:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697757068] [2021-03-10 22:59:02,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:02,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:59:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:59:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:02,933 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-03-10 22:59:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2021-03-10 22:59:02,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:59:02,975 INFO L628 ElimStorePlain]: treesize reduction 15, result has 69.4 percent of original size [2021-03-10 22:59:02,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 22:59:02,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:34 [2021-03-10 22:59:03,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:03,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-03-10 22:59:03,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:59:03,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:03,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:59:03,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-03-10 22:59:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-03-10 22:59:03,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:03,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 17 [2021-03-10 22:59:03,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431852734] [2021-03-10 22:59:03,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:59:03,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:03,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:59:03,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:59:03,340 INFO L87 Difference]: Start difference. First operand 20545 states and 89130 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:09,799 INFO L93 Difference]: Finished difference Result 40925 states and 166727 transitions. [2021-03-10 22:59:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-10 22:59:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:09,918 INFO L225 Difference]: With dead ends: 40925 [2021-03-10 22:59:09,918 INFO L226 Difference]: Without dead ends: 40130 [2021-03-10 22:59:09,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 2608.5ms TimeCoverageRelationStatistics Valid=861, Invalid=6621, Unknown=0, NotChecked=0, Total=7482 [2021-03-10 22:59:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40130 states. [2021-03-10 22:59:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40130 to 22541. [2021-03-10 22:59:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22541 states, 22540 states have (on average 4.351907719609583) internal successors, (98092), 22540 states have internal predecessors, (98092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22541 states to 22541 states and 98092 transitions. [2021-03-10 22:59:10,851 INFO L78 Accepts]: Start accepts. Automaton has 22541 states and 98092 transitions. Word has length 43 [2021-03-10 22:59:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:10,851 INFO L480 AbstractCegarLoop]: Abstraction has 22541 states and 98092 transitions. [2021-03-10 22:59:10,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22541 states and 98092 transitions. [2021-03-10 22:59:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:10,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:10,890 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:11,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:11,095 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1826733498, now seen corresponding path program 22 times [2021-03-10 22:59:11,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:11,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459657995] [2021-03-10 22:59:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:11,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459657995] [2021-03-10 22:59:11,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086971203] [2021-03-10 22:59:11,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:11,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:59:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:11,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:11,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 22:59:11,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95157267] [2021-03-10 22:59:11,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:59:11,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:11,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:59:11,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:59:11,266 INFO L87 Difference]: Start difference. First operand 22541 states and 98092 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:11,637 INFO L93 Difference]: Finished difference Result 33069 states and 136975 transitions. [2021-03-10 22:59:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:59:11,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:11,764 INFO L225 Difference]: With dead ends: 33069 [2021-03-10 22:59:11,764 INFO L226 Difference]: Without dead ends: 33057 [2021-03-10 22:59:11,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:59:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33057 states. [2021-03-10 22:59:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33057 to 24124. [2021-03-10 22:59:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24124 states, 24123 states have (on average 4.382083488786635) internal successors, (105709), 24123 states have internal predecessors, (105709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24124 states to 24124 states and 105709 transitions. [2021-03-10 22:59:12,675 INFO L78 Accepts]: Start accepts. Automaton has 24124 states and 105709 transitions. Word has length 43 [2021-03-10 22:59:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:12,675 INFO L480 AbstractCegarLoop]: Abstraction has 24124 states and 105709 transitions. [2021-03-10 22:59:12,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 24124 states and 105709 transitions. [2021-03-10 22:59:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:12,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:12,714 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:12,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-03-10 22:59:12,914 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:12,915 INFO L82 PathProgramCache]: Analyzing trace with hash 733833666, now seen corresponding path program 23 times [2021-03-10 22:59:12,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:12,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840463692] [2021-03-10 22:59:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:12,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840463692] [2021-03-10 22:59:12,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7274607] [2021-03-10 22:59:12,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:13,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:59:13,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:13,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:59:13,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:59:13,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:13,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 22:59:13,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492996172] [2021-03-10 22:59:13,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:59:13,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:13,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:59:13,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:59:13,098 INFO L87 Difference]: Start difference. First operand 24124 states and 105709 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:13,459 INFO L93 Difference]: Finished difference Result 37208 states and 153811 transitions. [2021-03-10 22:59:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:59:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:13,875 INFO L225 Difference]: With dead ends: 37208 [2021-03-10 22:59:13,876 INFO L226 Difference]: Without dead ends: 37208 [2021-03-10 22:59:13,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:59:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37208 states. [2021-03-10 22:59:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37208 to 24238. [2021-03-10 22:59:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24238 states, 24237 states have (on average 4.37661426744234) internal successors, (106076), 24237 states have internal predecessors, (106076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24238 states to 24238 states and 106076 transitions. [2021-03-10 22:59:14,722 INFO L78 Accepts]: Start accepts. Automaton has 24238 states and 106076 transitions. Word has length 43 [2021-03-10 22:59:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:14,723 INFO L480 AbstractCegarLoop]: Abstraction has 24238 states and 106076 transitions. [2021-03-10 22:59:14,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 24238 states and 106076 transitions. [2021-03-10 22:59:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:14,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:14,769 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:14,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 22:59:14,970 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:14,970 INFO L82 PathProgramCache]: Analyzing trace with hash -545594268, now seen corresponding path program 24 times [2021-03-10 22:59:14,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:14,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949758723] [2021-03-10 22:59:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:15,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949758723] [2021-03-10 22:59:15,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098562834] [2021-03-10 22:59:15,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:15,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:59:15,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:15,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:59:15,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:15,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:15,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 22:59:15,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704919033] [2021-03-10 22:59:15,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:59:15,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:59:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:59:15,127 INFO L87 Difference]: Start difference. First operand 24238 states and 106076 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:15,315 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-03-10 22:59:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:15,624 INFO L93 Difference]: Finished difference Result 41576 states and 175210 transitions. [2021-03-10 22:59:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:59:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:15,740 INFO L225 Difference]: With dead ends: 41576 [2021-03-10 22:59:15,740 INFO L226 Difference]: Without dead ends: 41572 [2021-03-10 22:59:15,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:59:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41572 states. [2021-03-10 22:59:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41572 to 31284. [2021-03-10 22:59:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31284 states, 31283 states have (on average 4.461976153182239) internal successors, (139584), 31283 states have internal predecessors, (139584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31284 states to 31284 states and 139584 transitions. [2021-03-10 22:59:16,718 INFO L78 Accepts]: Start accepts. Automaton has 31284 states and 139584 transitions. Word has length 43 [2021-03-10 22:59:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:16,719 INFO L480 AbstractCegarLoop]: Abstraction has 31284 states and 139584 transitions. [2021-03-10 22:59:16,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 31284 states and 139584 transitions. [2021-03-10 22:59:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:16,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:16,980 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:17,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 22:59:17,202 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:17,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087200, now seen corresponding path program 25 times [2021-03-10 22:59:17,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:17,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395609826] [2021-03-10 22:59:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:17,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395609826] [2021-03-10 22:59:17,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706001216] [2021-03-10 22:59:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:59:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:59:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:59:17,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:17,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 22:59:17,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445644324] [2021-03-10 22:59:17,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:59:17,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:59:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:59:17,369 INFO L87 Difference]: Start difference. First operand 31284 states and 139584 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:17,720 INFO L93 Difference]: Finished difference Result 47435 states and 199052 transitions. [2021-03-10 22:59:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:59:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:18,091 INFO L225 Difference]: With dead ends: 47435 [2021-03-10 22:59:18,091 INFO L226 Difference]: Without dead ends: 47435 [2021-03-10 22:59:18,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:59:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47435 states. [2021-03-10 22:59:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47435 to 31630. [2021-03-10 22:59:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31630 states, 31629 states have (on average 4.46277150716115) internal successors, (141153), 31629 states have internal predecessors, (141153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31630 states to 31630 states and 141153 transitions. [2021-03-10 22:59:19,087 INFO L78 Accepts]: Start accepts. Automaton has 31630 states and 141153 transitions. Word has length 43 [2021-03-10 22:59:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:19,087 INFO L480 AbstractCegarLoop]: Abstraction has 31630 states and 141153 transitions. [2021-03-10 22:59:19,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31630 states and 141153 transitions. [2021-03-10 22:59:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:19,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:19,164 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:19,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 22:59:19,365 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash -923525084, now seen corresponding path program 26 times [2021-03-10 22:59:19,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:19,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571685512] [2021-03-10 22:59:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:59:19,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571685512] [2021-03-10 22:59:19,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561914037] [2021-03-10 22:59:19,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:59:19,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:59:19,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:19,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:59:19,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:59:19,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:19,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 22:59:19,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092878665] [2021-03-10 22:59:19,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:59:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:59:19,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:59:19,763 INFO L87 Difference]: Start difference. First operand 31630 states and 141153 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:20,244 INFO L93 Difference]: Finished difference Result 55575 states and 232789 transitions. [2021-03-10 22:59:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:59:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:20,409 INFO L225 Difference]: With dead ends: 55575 [2021-03-10 22:59:20,410 INFO L226 Difference]: Without dead ends: 55575 [2021-03-10 22:59:20,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:59:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55575 states. [2021-03-10 22:59:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55575 to 34112. [2021-03-10 22:59:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34112 states, 34111 states have (on average 4.445692005511418) internal successors, (151647), 34111 states have internal predecessors, (151647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34112 states to 34112 states and 151647 transitions. [2021-03-10 22:59:21,695 INFO L78 Accepts]: Start accepts. Automaton has 34112 states and 151647 transitions. Word has length 43 [2021-03-10 22:59:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:21,695 INFO L480 AbstractCegarLoop]: Abstraction has 34112 states and 151647 transitions. [2021-03-10 22:59:21,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 34112 states and 151647 transitions. [2021-03-10 22:59:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:21,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:21,761 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:21,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 22:59:21,965 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash 780645344, now seen corresponding path program 27 times [2021-03-10 22:59:21,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:21,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680982757] [2021-03-10 22:59:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:22,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680982757] [2021-03-10 22:59:22,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763505075] [2021-03-10 22:59:22,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:59:22,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:59:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:59:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:22,199 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-03-10 22:59:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2021-03-10 22:59:22,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:59:22,229 INFO L628 ElimStorePlain]: treesize reduction 15, result has 63.4 percent of original size [2021-03-10 22:59:22,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:59:22,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-03-10 22:59:22,957 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_34], 6=[v_prenex_31]} [2021-03-10 22:59:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:22,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:22,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-10 22:59:22,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:59:23,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 22:59:23,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:59:23,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:59:23,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:59:23,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:23,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:59:23,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:59:23,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:23,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:59:23,177 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:127, output treesize:3 [2021-03-10 22:59:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 22:59:23,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:23,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-03-10 22:59:23,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826999852] [2021-03-10 22:59:23,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:59:23,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:23,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:59:23,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:59:23,229 INFO L87 Difference]: Start difference. First operand 34112 states and 151647 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 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) [2021-03-10 22:59:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:33,320 INFO L93 Difference]: Finished difference Result 105538 states and 440346 transitions. [2021-03-10 22:59:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2021-03-10 22:59:33,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 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) Word has length 43 [2021-03-10 22:59:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:33,481 INFO L225 Difference]: With dead ends: 105538 [2021-03-10 22:59:33,481 INFO L226 Difference]: Without dead ends: 59269 [2021-03-10 22:59:33,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21370 ImplicationChecksByTransitivity, 8077.8ms TimeCoverageRelationStatistics Valid=5872, Invalid=41870, Unknown=0, NotChecked=0, Total=47742 [2021-03-10 22:59:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59269 states. [2021-03-10 22:59:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59269 to 40822. [2021-03-10 22:59:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40822 states, 40821 states have (on average 4.461208691604811) internal successors, (182111), 40821 states have internal predecessors, (182111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40822 states to 40822 states and 182111 transitions. [2021-03-10 22:59:34,980 INFO L78 Accepts]: Start accepts. Automaton has 40822 states and 182111 transitions. Word has length 43 [2021-03-10 22:59:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:34,980 INFO L480 AbstractCegarLoop]: Abstraction has 40822 states and 182111 transitions. [2021-03-10 22:59:34,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 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) [2021-03-10 22:59:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 40822 states and 182111 transitions. [2021-03-10 22:59:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:35,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:35,054 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:35,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:35,255 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1332529956, now seen corresponding path program 28 times [2021-03-10 22:59:35,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:35,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783438845] [2021-03-10 22:59:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:59:35,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783438845] [2021-03-10 22:59:35,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668984953] [2021-03-10 22:59:35,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:35,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:35,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:59:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:59:35,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:35,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 22:59:35,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998954110] [2021-03-10 22:59:35,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:59:35,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:35,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:59:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:59:35,447 INFO L87 Difference]: Start difference. First operand 40822 states and 182111 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-03-10 22:59:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:36,238 INFO L93 Difference]: Finished difference Result 59964 states and 255087 transitions. [2021-03-10 22:59:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:59:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:36,503 INFO L225 Difference]: With dead ends: 59964 [2021-03-10 22:59:36,503 INFO L226 Difference]: Without dead ends: 59964 [2021-03-10 22:59:36,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:59:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59964 states. [2021-03-10 22:59:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59964 to 25606. [2021-03-10 22:59:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25606 states, 25605 states have (on average 4.357078695567272) internal successors, (111563), 25605 states have internal predecessors, (111563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25606 states to 25606 states and 111563 transitions. [2021-03-10 22:59:37,659 INFO L78 Accepts]: Start accepts. Automaton has 25606 states and 111563 transitions. Word has length 43 [2021-03-10 22:59:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:37,661 INFO L480 AbstractCegarLoop]: Abstraction has 25606 states and 111563 transitions. [2021-03-10 22:59:37,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-03-10 22:59:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25606 states and 111563 transitions. [2021-03-10 22:59:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:59:37,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:37,724 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:37,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:37,925 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash 932816428, now seen corresponding path program 29 times [2021-03-10 22:59:37,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:37,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140137862] [2021-03-10 22:59:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:59:37,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140137862] [2021-03-10 22:59:37,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347717218] [2021-03-10 22:59:37,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:38,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:59:38,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:59:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:59:38,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:38,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 22:59:38,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861439828] [2021-03-10 22:59:38,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:59:38,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:38,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:59:38,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:59:38,096 INFO L87 Difference]: Start difference. First operand 25606 states and 111563 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:38,634 INFO L93 Difference]: Finished difference Result 73107 states and 310778 transitions. [2021-03-10 22:59:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:59:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:59:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:38,875 INFO L225 Difference]: With dead ends: 73107 [2021-03-10 22:59:38,876 INFO L226 Difference]: Without dead ends: 73107 [2021-03-10 22:59:38,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:59:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73107 states. [2021-03-10 22:59:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73107 to 51314. [2021-03-10 22:59:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51314 states, 51313 states have (on average 4.386042523337166) internal successors, (225061), 51313 states have internal predecessors, (225061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51314 states to 51314 states and 225061 transitions. [2021-03-10 22:59:40,703 INFO L78 Accepts]: Start accepts. Automaton has 51314 states and 225061 transitions. Word has length 45 [2021-03-10 22:59:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:40,703 INFO L480 AbstractCegarLoop]: Abstraction has 51314 states and 225061 transitions. [2021-03-10 22:59:40,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 51314 states and 225061 transitions. [2021-03-10 22:59:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:59:40,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:40,805 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:41,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-03-10 22:59:41,005 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash 369841352, now seen corresponding path program 30 times [2021-03-10 22:59:41,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373476659] [2021-03-10 22:59:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:59:41,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373476659] [2021-03-10 22:59:41,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251751345] [2021-03-10 22:59:41,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:41,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:59:41,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:41,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:59:41,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-03-10 22:59:41,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:59:41,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:41,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:59:41,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2021-03-10 22:59:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:41,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-03-10 22:59:41,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:59:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:59:41,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:41,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-03-10 22:59:41,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 22:59:41,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:59:41,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:59:41,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:75, output treesize:22 [2021-03-10 22:59:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:59:41,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:41,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-03-10 22:59:41,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290892114] [2021-03-10 22:59:41,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:59:41,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:41,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:59:41,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:59:41,814 INFO L87 Difference]: Start difference. First operand 51314 states and 225061 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-03-10 22:59:42,862 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 22:59:46,875 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 22:59:49,960 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 22:59:50,178 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 22:59:50,968 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 22:59:51,762 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:59:52,692 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:59:52,928 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 22:59:53,139 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:59:53,650 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:59:53,927 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 22:59:55,029 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:59:55,234 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 22:59:55,484 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:59:55,848 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:59:56,042 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 22:59:56,273 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 22:59:56,428 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 22:59:57,557 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:59:58,091 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:59:58,368 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 22:59:59,612 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:59:59,937 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 23:00:00,720 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:00:01,317 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:00:01,721 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 23:00:02,090 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:00:02,380 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:00:02,834 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:00:03,211 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:00:03,543 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 23:00:04,168 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:00:04,510 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:00:05,094 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:00:05,270 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:00:05,711 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:00:06,397 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:00:06,645 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:00:06,955 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-10 23:00:07,339 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-10 23:00:07,568 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:00:07,793 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:00:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:08,113 INFO L93 Difference]: Finished difference Result 76525 states and 328162 transitions. [2021-03-10 23:00:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-03-10 23:00:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) Word has length 45 [2021-03-10 23:00:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:08,385 INFO L225 Difference]: With dead ends: 76525 [2021-03-10 23:00:08,385 INFO L226 Difference]: Without dead ends: 75801 [2021-03-10 23:00:08,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4870 ImplicationChecksByTransitivity, 12638.1ms TimeCoverageRelationStatistics Valid=2312, Invalid=13690, Unknown=0, NotChecked=0, Total=16002 [2021-03-10 23:00:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75801 states. [2021-03-10 23:00:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75801 to 48431. [2021-03-10 23:00:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48431 states, 48430 states have (on average 4.387156721040677) internal successors, (212470), 48430 states have internal predecessors, (212470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48431 states to 48431 states and 212470 transitions. [2021-03-10 23:00:09,796 INFO L78 Accepts]: Start accepts. Automaton has 48431 states and 212470 transitions. Word has length 45 [2021-03-10 23:00:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:09,796 INFO L480 AbstractCegarLoop]: Abstraction has 48431 states and 212470 transitions. [2021-03-10 23:00:09,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-03-10 23:00:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 48431 states and 212470 transitions. [2021-03-10 23:00:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 23:00:09,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:09,889 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:10,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:10,090 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash 683094210, now seen corresponding path program 31 times [2021-03-10 23:00:10,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:10,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106565278] [2021-03-10 23:00:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:00:10,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106565278] [2021-03-10 23:00:10,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894143931] [2021-03-10 23:00:10,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:00:10,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:00:10,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:10,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 23:00:10,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058393522] [2021-03-10 23:00:10,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:00:10,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:00:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:00:10,787 INFO L87 Difference]: Start difference. First operand 48431 states and 212470 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:12,336 INFO L93 Difference]: Finished difference Result 134784 states and 573076 transitions. [2021-03-10 23:00:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:00:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 23:00:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:12,909 INFO L225 Difference]: With dead ends: 134784 [2021-03-10 23:00:12,909 INFO L226 Difference]: Without dead ends: 132608 [2021-03-10 23:00:12,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:00:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132608 states. [2021-03-10 23:00:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132608 to 63740. [2021-03-10 23:00:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63740 states, 63739 states have (on average 4.3838623134972305) internal successors, (279423), 63739 states have internal predecessors, (279423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63740 states to 63740 states and 279423 transitions. [2021-03-10 23:00:15,566 INFO L78 Accepts]: Start accepts. Automaton has 63740 states and 279423 transitions. Word has length 45 [2021-03-10 23:00:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:15,566 INFO L480 AbstractCegarLoop]: Abstraction has 63740 states and 279423 transitions. [2021-03-10 23:00:15,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 63740 states and 279423 transitions. [2021-03-10 23:00:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:00:15,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:15,705 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:15,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-03-10 23:00:15,907 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:15,908 INFO L82 PathProgramCache]: Analyzing trace with hash -218983474, now seen corresponding path program 32 times [2021-03-10 23:00:15,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:15,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896341374] [2021-03-10 23:00:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-03-10 23:00:16,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896341374] [2021-03-10 23:00:16,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923592290] [2021-03-10 23:00:16,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:16,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:00:16,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:00:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:16,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-03-10 23:00:16,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-03-10 23:00:16,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:16,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:00:16,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:00:16,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-03-10 23:00:16,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-03-10 23:00:16,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-03-10 23:00:16,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:16,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:00:16,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:00:16,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:45 [2021-03-10 23:00:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-03-10 23:00:16,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:00:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-03-10 23:00:16,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:16,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:00:16,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:00:16,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-03-10 23:00:17,459 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:00:17,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:00:17,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-03-10 23:00:17,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:00:17,752 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-03-10 23:00:17,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 21 [2021-03-10 23:00:17,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:17,841 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-03-10 23:00:17,864 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-10 23:00:17,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2021-03-10 23:00:17,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:17,874 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 23:00:17,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-03-10 23:00:17,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:00:17,895 INFO L628 ElimStorePlain]: treesize reduction 34, result has 12.8 percent of original size [2021-03-10 23:00:17,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:00:17,896 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-03-10 23:00:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:00:17,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:17,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-03-10 23:00:17,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633086440] [2021-03-10 23:00:17,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:00:17,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:00:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:00:17,927 INFO L87 Difference]: Start difference. First operand 63740 states and 279423 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:19,328 INFO L93 Difference]: Finished difference Result 77640 states and 338533 transitions. [2021-03-10 23:00:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:00:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:00:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:19,329 INFO L225 Difference]: With dead ends: 77640 [2021-03-10 23:00:19,330 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 23:00:19,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1223.4ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:00:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 23:00:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 23:00:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 23:00:19,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-03-10 23:00:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:19,330 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 23:00:19,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 23:00:19,330 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 23:00:19,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 23:00:19,535 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:00:19 BasicIcfg [2021-03-10 23:00:19,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:00:19,535 INFO L168 Benchmark]: Toolchain (without parser) took 468282.79 ms. Allocated memory was 255.9 MB in the beginning and 12.7 GB in the end (delta: 12.4 GB). Free memory was 236.6 MB in the beginning and 8.2 GB in the end (delta: -7.9 GB). Peak memory consumption was 4.5 GB. Max. memory is 16.0 GB. [2021-03-10 23:00:19,535 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 157.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:00:19,535 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.63 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:00:19,536 INFO L168 Benchmark]: Boogie Preprocessor took 24.49 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:00:19,536 INFO L168 Benchmark]: RCFGBuilder took 270.11 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.4 MB in the end (delta: -2.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.0 GB. [2021-03-10 23:00:19,536 INFO L168 Benchmark]: TraceAbstraction took 467953.89 ms. Allocated memory was 255.9 MB in the beginning and 12.7 GB in the end (delta: 12.4 GB). Free memory was 235.2 MB in the beginning and 8.2 GB in the end (delta: -7.9 GB). Peak memory consumption was 4.5 GB. Max. memory is 16.0 GB. [2021-03-10 23:00:19,536 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 157.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.63 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.49 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 270.11 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.4 MB in the end (delta: -2.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 467953.89 ms. Allocated memory was 255.9 MB in the beginning and 12.7 GB in the end (delta: 12.4 GB). Free memory was 235.2 MB in the beginning and 8.2 GB in the end (delta: -7.9 GB). Peak memory consumption was 4.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 467832.1ms, OverallIterations: 42, TraceHistogramMax: 4, EmptinessCheckTime: 1408.7ms, AutomataDifference: 417925.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 89.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2685 SDtfs, 11153 SDslu, 15257 SDs, 0 SdLazy, 17380 SolverSat, 1716 SolverUnsat, 54 SolverUnknown, 0 SolverNotchecked, 132097.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2592 GetRequests, 1389 SyntacticMatches, 36 SemanticMatches, 1167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37159 ImplicationChecksByTransitivity, 280000.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=63740occurred in iteration=41, InterpolantAutomatonStates: 1128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20438.9ms AutomataMinimizationTime, 42 MinimizatonAttempts, 350364 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 259.5ms SsaConstructionTime, 1060.9ms SatisfiabilityAnalysisTime, 17985.8ms InterpolantComputationTime, 2797 NumberOfCodeBlocks, 2781 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 2720 ConstructedInterpolants, 39 QuantifiedInterpolants, 13743 SizeOfPredicates, 84 NumberOfNonLiveVariables, 3556 ConjunctsInSsa, 387 ConjunctsInUnsatCore, 77 InterpolantComputations, 7 PerfectInterpolantSequences, 852/1509 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...