/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 05:13:29,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 05:13:29,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 05:13:29,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 05:13:29,832 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 [2021-04-15 05:13:29,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 05:13:29,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 05:13:29,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 05:13:29,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 05:13:29,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 05:13:29,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 05:13:29,874 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 05:13:29,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 05:13:29,875 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 05:13:29,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 05:13:29,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 05:13:29,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 05:13:29,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 05:13:29,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 05:13:29,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 05:13:29,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 05:13:29,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 05:13:29,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 05:13:29,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 05:13:29,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 05:13:29,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 05:13:29,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 05:13:29,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 05:13:29,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:13:29,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 05:13:29,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 05:13:29,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 05:13:29,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 05:13:29,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 05:13:29,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 05:13:29,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 05:13:29,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 05:13:30,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 05:13:30,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 05:13:30,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 05:13:30,198 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 05:13:30,200 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 05:13:30,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-04-15 05:13:30,201 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-04-15 05:13:30,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 05:13:30,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 05:13:30,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 05:13:30,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 05:13:30,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 05:13:30,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 05:13:30,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 05:13:30,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 05:13:30,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 05:13:30,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/1) ... [2021-04-15 05:13:30,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 05:13:30,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 05:13:30,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 05:13:30,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 05:13:30,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (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 [2021-04-15 05:13:30,359 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 05:13:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 05:13:30,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 05:13:30,360 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 05:13:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 05:13:30,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 05:13:30,360 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 05:13:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 05:13:30,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 05:13:30,361 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 05:13:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 05:13:30,361 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 05:13:30,362 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 05:13:30,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 05:13:30,616 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 05:13:30,617 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:13:30 BoogieIcfgContainer [2021-04-15 05:13:30,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 05:13:30,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 05:13:30,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 05:13:30,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 05:13:30,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:13:30" (1/2) ... [2021-04-15 05:13:30,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eadfe7 and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:13:30, skipping insertion in model container [2021-04-15 05:13:30,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:13:30" (2/2) ... [2021-04-15 05:13:30,623 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-04-15 05:13:30,642 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 05:13:30,643 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 05:13:30,645 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 05:13:30,646 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 05:13:30,678 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 05:13:30,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 05:13:30,707 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 05:13:30,708 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 05:13:30,708 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 05:13:30,708 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 05:13:30,708 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 05:13:30,708 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 05:13:30,708 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 05:13:30,708 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 05:13:30,716 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-04-15 05:13:30,775 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:13:30,797 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:30,798 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:30,798 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash -894934944, now seen corresponding path program 1 times [2021-04-15 05:13:30,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:30,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30600491] [2021-04-15 05:13:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:31,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30600491] [2021-04-15 05:13:31,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:31,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 05:13:31,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725259171] [2021-04-15 05:13:31,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:13:31,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:31,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:13:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:31,183 INFO L87 Difference]: Start difference. First operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 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 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:31,325 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-04-15 05:13:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:13:31,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:13:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:31,350 INFO L225 Difference]: With dead ends: 349 [2021-04-15 05:13:31,350 INFO L226 Difference]: Without dead ends: 311 [2021-04-15 05:13:31,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-04-15 05:13:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-04-15 05:13:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-04-15 05:13:31,436 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-04-15 05:13:31,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:31,436 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-04-15 05:13:31,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-04-15 05:13:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:13:31,441 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:31,441 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:31,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 05:13:31,441 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1198566966, now seen corresponding path program 2 times [2021-04-15 05:13:31,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:31,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043149001] [2021-04-15 05:13:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:31,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043149001] [2021-04-15 05:13:31,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:31,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 05:13:31,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264729761] [2021-04-15 05:13:31,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:13:31,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:31,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:13:31,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:31,591 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:31,681 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-04-15 05:13:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:13:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:31,684 INFO L225 Difference]: With dead ends: 333 [2021-04-15 05:13:31,685 INFO L226 Difference]: Without dead ends: 296 [2021-04-15 05:13:31,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-04-15 05:13:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-04-15 05:13:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-04-15 05:13:31,714 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-04-15 05:13:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:31,714 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-04-15 05:13:31,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-04-15 05:13:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:13:31,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:31,715 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:31,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 05:13:31,716 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:31,716 INFO L82 PathProgramCache]: Analyzing trace with hash -602461050, now seen corresponding path program 3 times [2021-04-15 05:13:31,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:31,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384756734] [2021-04-15 05:13:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:31,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384756734] [2021-04-15 05:13:31,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:31,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 05:13:31,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070170436] [2021-04-15 05:13:31,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:13:31,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:13:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:31,813 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:31,887 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-04-15 05:13:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:13:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:31,890 INFO L225 Difference]: With dead ends: 320 [2021-04-15 05:13:31,890 INFO L226 Difference]: Without dead ends: 280 [2021-04-15 05:13:31,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-04-15 05:13:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-04-15 05:13:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-04-15 05:13:31,904 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-04-15 05:13:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:31,905 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-04-15 05:13:31,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-04-15 05:13:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:13:31,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:31,911 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:31,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 05:13:31,911 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash -630863238, now seen corresponding path program 4 times [2021-04-15 05:13:31,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:31,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315747890] [2021-04-15 05:13:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:32,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315747890] [2021-04-15 05:13:32,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:32,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 05:13:32,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141139597] [2021-04-15 05:13:32,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:13:32,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:13:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:32,068 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:32,136 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-04-15 05:13:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:13:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:13:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:32,138 INFO L225 Difference]: With dead ends: 327 [2021-04-15 05:13:32,138 INFO L226 Difference]: Without dead ends: 290 [2021-04-15 05:13:32,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-04-15 05:13:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-04-15 05:13:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-04-15 05:13:32,148 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-04-15 05:13:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:32,148 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-04-15 05:13:32,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-04-15 05:13:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:13:32,149 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:32,149 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:32,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 05:13:32,150 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:32,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2144128130, now seen corresponding path program 5 times [2021-04-15 05:13:32,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:32,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967719610] [2021-04-15 05:13:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:32,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967719610] [2021-04-15 05:13:32,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:32,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 05:13:32,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799007275] [2021-04-15 05:13:32,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:13:32,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:32,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:13:32,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:32,290 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:32,375 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-04-15 05:13:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:32,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:13:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:32,378 INFO L225 Difference]: With dead ends: 333 [2021-04-15 05:13:32,379 INFO L226 Difference]: Without dead ends: 296 [2021-04-15 05:13:32,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-04-15 05:13:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-04-15 05:13:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-04-15 05:13:32,389 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-04-15 05:13:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:32,389 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-04-15 05:13:32,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-04-15 05:13:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:13:32,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:32,391 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:32,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 05:13:32,391 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:32,391 INFO L82 PathProgramCache]: Analyzing trace with hash 909995578, now seen corresponding path program 6 times [2021-04-15 05:13:32,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:32,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122755601] [2021-04-15 05:13:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:32,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122755601] [2021-04-15 05:13:32,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:32,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 05:13:32,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746670379] [2021-04-15 05:13:32,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:13:32,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:32,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:13:32,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:32,542 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:32,616 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-04-15 05:13:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:13:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:32,619 INFO L225 Difference]: With dead ends: 337 [2021-04-15 05:13:32,619 INFO L226 Difference]: Without dead ends: 297 [2021-04-15 05:13:32,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-04-15 05:13:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-04-15 05:13:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-04-15 05:13:32,628 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-04-15 05:13:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:32,630 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-04-15 05:13:32,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-04-15 05:13:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:32,631 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:32,631 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:32,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 05:13:32,631 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:32,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2086549228, now seen corresponding path program 1 times [2021-04-15 05:13:32,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:32,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225850213] [2021-04-15 05:13:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:32,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225850213] [2021-04-15 05:13:32,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105185368] [2021-04-15 05:13:32,683 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 [2021-04-15 05:13:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:13:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:32,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:32,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 05:13:32,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224543914] [2021-04-15 05:13:32,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:13:32,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:32,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:13:32,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:13:32,814 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:32,912 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2021-04-15 05:13:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:13:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:32,914 INFO L225 Difference]: With dead ends: 342 [2021-04-15 05:13:32,914 INFO L226 Difference]: Without dead ends: 342 [2021-04-15 05:13:32,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-04-15 05:13:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 213. [2021-04-15 05:13:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-04-15 05:13:32,922 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-04-15 05:13:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:32,923 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-04-15 05:13:32,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-04-15 05:13:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:32,923 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:32,924 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:33,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-04-15 05:13:33,158 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 785545354, now seen corresponding path program 1 times [2021-04-15 05:13:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:33,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126966756] [2021-04-15 05:13:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:33,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126966756] [2021-04-15 05:13:33,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:33,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:33,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385167618] [2021-04-15 05:13:33,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:33,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:33,191 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:33,262 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-04-15 05:13:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:13:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:33,264 INFO L225 Difference]: With dead ends: 361 [2021-04-15 05:13:33,264 INFO L226 Difference]: Without dead ends: 337 [2021-04-15 05:13:33,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-04-15 05:13:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-04-15 05:13:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-04-15 05:13:33,272 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-04-15 05:13:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:33,272 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-04-15 05:13:33,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-04-15 05:13:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:33,274 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:33,274 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:33,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 05:13:33,275 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash 727801610, now seen corresponding path program 2 times [2021-04-15 05:13:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:33,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024376147] [2021-04-15 05:13:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:33,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024376147] [2021-04-15 05:13:33,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376839064] [2021-04-15 05:13:33,316 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 [2021-04-15 05:13:33,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:33,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:13:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:33,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:33,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 05:13:33,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242723926] [2021-04-15 05:13:33,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:13:33,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:13:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:13:33,467 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:33,562 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-04-15 05:13:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:13:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:13:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:33,567 INFO L225 Difference]: With dead ends: 495 [2021-04-15 05:13:33,567 INFO L226 Difference]: Without dead ends: 495 [2021-04-15 05:13:33,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-04-15 05:13:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-04-15 05:13:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-04-15 05:13:33,576 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-04-15 05:13:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:33,577 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-04-15 05:13:33,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-04-15 05:13:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:33,578 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:33,578 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:33,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:33,801 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash 517104564, now seen corresponding path program 2 times [2021-04-15 05:13:33,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:33,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486604851] [2021-04-15 05:13:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:33,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486604851] [2021-04-15 05:13:33,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:33,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:33,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420195073] [2021-04-15 05:13:33,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:33,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:33,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:33,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:33,829 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:33,878 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-04-15 05:13:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 05:13:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:33,880 INFO L225 Difference]: With dead ends: 341 [2021-04-15 05:13:33,881 INFO L226 Difference]: Without dead ends: 335 [2021-04-15 05:13:33,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-04-15 05:13:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-04-15 05:13:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-04-15 05:13:33,889 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-04-15 05:13:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:33,889 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-04-15 05:13:33,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:33,890 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-04-15 05:13:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:33,891 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:33,891 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:33,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-15 05:13:33,891 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1245856382, now seen corresponding path program 3 times [2021-04-15 05:13:33,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:33,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158439238] [2021-04-15 05:13:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:33,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158439238] [2021-04-15 05:13:33,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:33,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840207112] [2021-04-15 05:13:33,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:33,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:33,928 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:33,982 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-04-15 05:13:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:13:33,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:33,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:33,984 INFO L225 Difference]: With dead ends: 284 [2021-04-15 05:13:33,984 INFO L226 Difference]: Without dead ends: 284 [2021-04-15 05:13:33,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-04-15 05:13:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-04-15 05:13:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-04-15 05:13:33,993 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-04-15 05:13:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:33,993 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-04-15 05:13:33,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-04-15 05:13:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:33,994 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:33,995 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:33,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 05:13:33,995 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 868885228, now seen corresponding path program 3 times [2021-04-15 05:13:33,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:33,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415286244] [2021-04-15 05:13:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:34,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415286244] [2021-04-15 05:13:34,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:34,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:34,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061856544] [2021-04-15 05:13:34,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:34,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:34,029 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:34,095 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-04-15 05:13:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:34,097 INFO L225 Difference]: With dead ends: 394 [2021-04-15 05:13:34,097 INFO L226 Difference]: Without dead ends: 387 [2021-04-15 05:13:34,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:13:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-04-15 05:13:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-04-15 05:13:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-04-15 05:13:34,105 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-04-15 05:13:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:34,105 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-04-15 05:13:34,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-04-15 05:13:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:34,106 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:34,106 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:34,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 05:13:34,106 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash -241548014, now seen corresponding path program 4 times [2021-04-15 05:13:34,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:34,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423945847] [2021-04-15 05:13:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:34,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423945847] [2021-04-15 05:13:34,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314757243] [2021-04-15 05:13:34,132 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 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 [2021-04-15 05:13:34,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:13:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:34,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:34,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 05:13:34,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133284652] [2021-04-15 05:13:34,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:13:34,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:34,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:13:34,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:13:34,234 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:34,306 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-04-15 05:13:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:13:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:34,308 INFO L225 Difference]: With dead ends: 340 [2021-04-15 05:13:34,308 INFO L226 Difference]: Without dead ends: 340 [2021-04-15 05:13:34,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-04-15 05:13:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-04-15 05:13:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-04-15 05:13:34,316 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-04-15 05:13:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:34,316 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-04-15 05:13:34,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-04-15 05:13:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:34,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:34,318 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:34,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 05:13:34,539 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1742404094, now seen corresponding path program 4 times [2021-04-15 05:13:34,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:34,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719377871] [2021-04-15 05:13:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:34,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719377871] [2021-04-15 05:13:34,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:34,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:34,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802218884] [2021-04-15 05:13:34,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:34,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:34,563 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:34,610 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-04-15 05:13:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:13:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:34,612 INFO L225 Difference]: With dead ends: 348 [2021-04-15 05:13:34,612 INFO L226 Difference]: Without dead ends: 330 [2021-04-15 05:13:34,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-04-15 05:13:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-04-15 05:13:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-04-15 05:13:34,619 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-04-15 05:13:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:34,619 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-04-15 05:13:34,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-04-15 05:13:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:34,620 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:34,620 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:34,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-04-15 05:13:34,620 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2089386992, now seen corresponding path program 5 times [2021-04-15 05:13:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:34,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354177786] [2021-04-15 05:13:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:34,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354177786] [2021-04-15 05:13:34,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81151362] [2021-04-15 05:13:34,654 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 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 [2021-04-15 05:13:34,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:34,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:34,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:13:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:34,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:34,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 05:13:34,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991022831] [2021-04-15 05:13:34,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:13:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:34,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:13:34,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:13:34,762 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:34,839 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-04-15 05:13:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:13:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:13:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:34,842 INFO L225 Difference]: With dead ends: 379 [2021-04-15 05:13:34,842 INFO L226 Difference]: Without dead ends: 379 [2021-04-15 05:13:34,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:13:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-04-15 05:13:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-04-15 05:13:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-04-15 05:13:34,851 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-04-15 05:13:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:34,852 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-04-15 05:13:34,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-04-15 05:13:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:34,853 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:34,853 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:35,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:35,075 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:35,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1878689946, now seen corresponding path program 5 times [2021-04-15 05:13:35,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:35,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471270312] [2021-04-15 05:13:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:35,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471270312] [2021-04-15 05:13:35,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:35,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:35,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90852332] [2021-04-15 05:13:35,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:35,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:35,097 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:35,154 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-04-15 05:13:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:35,156 INFO L225 Difference]: With dead ends: 381 [2021-04-15 05:13:35,156 INFO L226 Difference]: Without dead ends: 375 [2021-04-15 05:13:35,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:13:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-04-15 05:13:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-04-15 05:13:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-04-15 05:13:35,164 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-04-15 05:13:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:35,164 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-04-15 05:13:35,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-04-15 05:13:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:35,165 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:35,165 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:35,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-04-15 05:13:35,166 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:35,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1687525532, now seen corresponding path program 6 times [2021-04-15 05:13:35,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:35,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724988962] [2021-04-15 05:13:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:35,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724988962] [2021-04-15 05:13:35,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:35,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:35,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045128228] [2021-04-15 05:13:35,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:35,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:35,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:35,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:35,206 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:35,262 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-04-15 05:13:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:13:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:35,263 INFO L225 Difference]: With dead ends: 311 [2021-04-15 05:13:35,263 INFO L226 Difference]: Without dead ends: 311 [2021-04-15 05:13:35,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:13:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-04-15 05:13:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-04-15 05:13:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-04-15 05:13:35,270 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-04-15 05:13:35,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:35,270 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-04-15 05:13:35,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-04-15 05:13:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:13:35,271 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:35,271 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:35,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-04-15 05:13:35,271 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2064496686, now seen corresponding path program 6 times [2021-04-15 05:13:35,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:35,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99374054] [2021-04-15 05:13:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:35,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99374054] [2021-04-15 05:13:35,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:13:35,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:13:35,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060581782] [2021-04-15 05:13:35,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:13:35,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:35,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:13:35,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:13:35,300 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:35,341 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-04-15 05:13:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 05:13:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 [2021-04-15 05:13:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:35,342 INFO L225 Difference]: With dead ends: 256 [2021-04-15 05:13:35,342 INFO L226 Difference]: Without dead ends: 249 [2021-04-15 05:13:35,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:13:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-04-15 05:13:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-04-15 05:13:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-04-15 05:13:35,349 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-04-15 05:13:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:35,349 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-04-15 05:13:35,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-04-15 05:13:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-04-15 05:13:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:35,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:35,350 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:35,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-04-15 05:13:35,350 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2038135170, now seen corresponding path program 1 times [2021-04-15 05:13:35,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:35,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099596372] [2021-04-15 05:13:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:35,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099596372] [2021-04-15 05:13:35,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616424956] [2021-04-15 05:13:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:35,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:35,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:35,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:35,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-04-15 05:13:35,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841381715] [2021-04-15 05:13:35,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:13:35,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:35,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:13:35,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:35,603 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:35,693 INFO L93 Difference]: Finished difference Result 387 states and 917 transitions. [2021-04-15 05:13:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:35,696 INFO L225 Difference]: With dead ends: 387 [2021-04-15 05:13:35,696 INFO L226 Difference]: Without dead ends: 349 [2021-04-15 05:13:35,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-04-15 05:13:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 246. [2021-04-15 05:13:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3510204081632655) internal successors, (576), 245 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 576 transitions. [2021-04-15 05:13:35,704 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 576 transitions. Word has length 28 [2021-04-15 05:13:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:35,704 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 576 transitions. [2021-04-15 05:13:35,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 576 transitions. [2021-04-15 05:13:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:35,705 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:35,705 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:35,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:35,926 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:35,926 INFO L82 PathProgramCache]: Analyzing trace with hash -957499002, now seen corresponding path program 2 times [2021-04-15 05:13:35,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:35,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517101255] [2021-04-15 05:13:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:36,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517101255] [2021-04-15 05:13:36,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148319810] [2021-04-15 05:13:36,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:36,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 05:13:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:36,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:36,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 05:13:36,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195985487] [2021-04-15 05:13:36,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:13:36,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:13:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:13:36,165 INFO L87 Difference]: Start difference. First operand 246 states and 576 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:36,272 INFO L93 Difference]: Finished difference Result 496 states and 1252 transitions. [2021-04-15 05:13:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:36,274 INFO L225 Difference]: With dead ends: 496 [2021-04-15 05:13:36,274 INFO L226 Difference]: Without dead ends: 459 [2021-04-15 05:13:36,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-04-15 05:13:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 337. [2021-04-15 05:13:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.4791666666666665) internal successors, (833), 336 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 833 transitions. [2021-04-15 05:13:36,285 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 833 transitions. Word has length 28 [2021-04-15 05:13:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:36,285 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 833 transitions. [2021-04-15 05:13:36,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 833 transitions. [2021-04-15 05:13:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:36,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:36,286 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:36,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:36,507 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:36,508 INFO L82 PathProgramCache]: Analyzing trace with hash -361393086, now seen corresponding path program 3 times [2021-04-15 05:13:36,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:36,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741615550] [2021-04-15 05:13:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:36,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741615550] [2021-04-15 05:13:36,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368763093] [2021-04-15 05:13:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:36,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:13:36,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:36,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 05:13:36,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:36,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:36,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 05:13:36,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614985677] [2021-04-15 05:13:36,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:13:36,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:36,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:13:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:13:36,743 INFO L87 Difference]: Start difference. First operand 337 states and 833 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:36,856 INFO L93 Difference]: Finished difference Result 504 states and 1265 transitions. [2021-04-15 05:13:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:36,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:36,858 INFO L225 Difference]: With dead ends: 504 [2021-04-15 05:13:36,859 INFO L226 Difference]: Without dead ends: 462 [2021-04-15 05:13:36,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-04-15 05:13:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 331. [2021-04-15 05:13:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.4727272727272727) internal successors, (816), 330 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 816 transitions. [2021-04-15 05:13:36,868 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 816 transitions. Word has length 28 [2021-04-15 05:13:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:36,868 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 816 transitions. [2021-04-15 05:13:36,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 816 transitions. [2021-04-15 05:13:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:36,870 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:36,870 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:37,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:37,092 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1418916614, now seen corresponding path program 4 times [2021-04-15 05:13:37,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:37,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165372316] [2021-04-15 05:13:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165372316] [2021-04-15 05:13:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712358675] [2021-04-15 05:13:37,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:37,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:37,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:37,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:37,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:37,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-04-15 05:13:37,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615271509] [2021-04-15 05:13:37,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:13:37,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:13:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:13:37,326 INFO L87 Difference]: Start difference. First operand 331 states and 816 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:37,431 INFO L93 Difference]: Finished difference Result 519 states and 1295 transitions. [2021-04-15 05:13:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:13:37,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:37,434 INFO L225 Difference]: With dead ends: 519 [2021-04-15 05:13:37,434 INFO L226 Difference]: Without dead ends: 481 [2021-04-15 05:13:37,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-04-15 05:13:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2021-04-15 05:13:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-04-15 05:13:37,444 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-04-15 05:13:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:37,444 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-04-15 05:13:37,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-04-15 05:13:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:37,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:37,445 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:37,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 05:13:37,661 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1124070530, now seen corresponding path program 5 times [2021-04-15 05:13:37,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:37,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422061430] [2021-04-15 05:13:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:37,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422061430] [2021-04-15 05:13:37,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716573905] [2021-04-15 05:13:37,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:37,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:13:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:37,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:37,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:13:37,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538830091] [2021-04-15 05:13:37,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:13:37,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:37,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:13:37,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:13:37,912 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:38,020 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-04-15 05:13:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:38,025 INFO L225 Difference]: With dead ends: 530 [2021-04-15 05:13:38,025 INFO L226 Difference]: Without dead ends: 493 [2021-04-15 05:13:38,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-04-15 05:13:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-04-15 05:13:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-04-15 05:13:38,037 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-04-15 05:13:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:38,037 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-04-15 05:13:38,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-04-15 05:13:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:38,038 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:38,038 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:38,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:38,261 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:38,262 INFO L82 PathProgramCache]: Analyzing trace with hash 152433534, now seen corresponding path program 6 times [2021-04-15 05:13:38,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:38,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861679292] [2021-04-15 05:13:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861679292] [2021-04-15 05:13:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613866615] [2021-04-15 05:13:38,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:38,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:13:38,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:38,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:38,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-04-15 05:13:38,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778574345] [2021-04-15 05:13:38,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:13:38,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:38,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:13:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:38,502 INFO L87 Difference]: Start difference. First operand 439 states and 1118 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:38,623 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-04-15 05:13:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:38,626 INFO L225 Difference]: With dead ends: 526 [2021-04-15 05:13:38,626 INFO L226 Difference]: Without dead ends: 486 [2021-04-15 05:13:38,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:13:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-04-15 05:13:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-04-15 05:13:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-04-15 05:13:38,636 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-04-15 05:13:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:38,637 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-04-15 05:13:38,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-04-15 05:13:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:38,638 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:38,638 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:38,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:38,853 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1703038790, now seen corresponding path program 7 times [2021-04-15 05:13:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:38,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315761168] [2021-04-15 05:13:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:38,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315761168] [2021-04-15 05:13:38,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908867650] [2021-04-15 05:13:38,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:38,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:39,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:39,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-04-15 05:13:39,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982847437] [2021-04-15 05:13:39,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:13:39,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:13:39,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:39,114 INFO L87 Difference]: Start difference. First operand 429 states and 1091 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:39,218 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-04-15 05:13:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:39,221 INFO L225 Difference]: With dead ends: 623 [2021-04-15 05:13:39,221 INFO L226 Difference]: Without dead ends: 585 [2021-04-15 05:13:39,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-04-15 05:13:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-04-15 05:13:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-04-15 05:13:39,238 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-04-15 05:13:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:39,238 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-04-15 05:13:39,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-04-15 05:13:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:39,242 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:39,243 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:39,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 05:13:39,467 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:39,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash -908403066, now seen corresponding path program 8 times [2021-04-15 05:13:39,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:39,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115854692] [2021-04-15 05:13:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:39,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115854692] [2021-04-15 05:13:39,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123560191] [2021-04-15 05:13:39,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:39,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:39,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:39,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:39,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:39,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:39,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-04-15 05:13:39,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470085611] [2021-04-15 05:13:39,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:13:39,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:13:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:39,690 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 05:13:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:39,790 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-04-15 05:13:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 28 [2021-04-15 05:13:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:39,793 INFO L225 Difference]: With dead ends: 774 [2021-04-15 05:13:39,793 INFO L226 Difference]: Without dead ends: 737 [2021-04-15 05:13:39,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-04-15 05:13:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-04-15 05:13:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-04-15 05:13:39,806 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-04-15 05:13:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:39,806 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-04-15 05:13:39,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 05:13:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-04-15 05:13:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:39,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:39,807 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:40,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 05:13:40,029 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:40,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1688905474, now seen corresponding path program 9 times [2021-04-15 05:13:40,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:40,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087605592] [2021-04-15 05:13:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:40,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087605592] [2021-04-15 05:13:40,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252245667] [2021-04-15 05:13:40,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:40,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:13:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:40,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:40,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-04-15 05:13:40,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734987995] [2021-04-15 05:13:40,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:13:40,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:40,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:13:40,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:13:40,281 INFO L87 Difference]: Start difference. First operand 491 states and 1272 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:40,371 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-04-15 05:13:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:13:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:40,375 INFO L225 Difference]: With dead ends: 766 [2021-04-15 05:13:40,375 INFO L226 Difference]: Without dead ends: 729 [2021-04-15 05:13:40,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-04-15 05:13:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-04-15 05:13:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-04-15 05:13:40,388 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-04-15 05:13:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:40,388 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-04-15 05:13:40,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-04-15 05:13:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:40,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:40,390 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:40,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 05:13:40,603 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash 705112774, now seen corresponding path program 10 times [2021-04-15 05:13:40,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:40,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38397453] [2021-04-15 05:13:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:40,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38397453] [2021-04-15 05:13:40,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012548768] [2021-04-15 05:13:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:40,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:40,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:40,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:40,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:40,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-04-15 05:13:40,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810967709] [2021-04-15 05:13:40,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:13:40,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:40,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:13:40,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:40,847 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 05:13:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:40,977 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-04-15 05:13:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 28 [2021-04-15 05:13:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:40,981 INFO L225 Difference]: With dead ends: 860 [2021-04-15 05:13:40,981 INFO L226 Difference]: Without dead ends: 823 [2021-04-15 05:13:40,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-04-15 05:13:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-04-15 05:13:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-04-15 05:13:40,994 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-04-15 05:13:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:40,994 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-04-15 05:13:40,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 05:13:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-04-15 05:13:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:40,995 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:40,996 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:41,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:41,217 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash 586029762, now seen corresponding path program 11 times [2021-04-15 05:13:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:41,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305703042] [2021-04-15 05:13:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305703042] [2021-04-15 05:13:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850817163] [2021-04-15 05:13:41,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:41,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:41,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:41,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:41,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:41,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-04-15 05:13:41,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131290250] [2021-04-15 05:13:41,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:13:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:13:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:41,446 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:41,610 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-04-15 05:13:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:41,614 INFO L225 Difference]: With dead ends: 864 [2021-04-15 05:13:41,614 INFO L226 Difference]: Without dead ends: 822 [2021-04-15 05:13:41,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-04-15 05:13:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-04-15 05:13:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-04-15 05:13:41,641 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-04-15 05:13:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:41,641 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-04-15 05:13:41,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-04-15 05:13:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:41,643 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:41,643 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:41,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 05:13:41,867 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:41,868 INFO L82 PathProgramCache]: Analyzing trace with hash -645966640, now seen corresponding path program 12 times [2021-04-15 05:13:41,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:41,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373554544] [2021-04-15 05:13:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:41,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373554544] [2021-04-15 05:13:41,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949490958] [2021-04-15 05:13:41,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:42,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 05:13:42,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:42,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:42,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-04-15 05:13:42,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979323392] [2021-04-15 05:13:42,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:13:42,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:42,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:13:42,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:42,130 INFO L87 Difference]: Start difference. First operand 571 states and 1508 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:42,235 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-04-15 05:13:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:42,237 INFO L225 Difference]: With dead ends: 752 [2021-04-15 05:13:42,238 INFO L226 Difference]: Without dead ends: 715 [2021-04-15 05:13:42,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-04-15 05:13:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-04-15 05:13:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-04-15 05:13:42,248 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-04-15 05:13:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:42,248 INFO L480 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-04-15 05:13:42,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-04-15 05:13:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:42,250 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:42,250 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:42,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:42,465 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash 638629600, now seen corresponding path program 13 times [2021-04-15 05:13:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:42,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791179459] [2021-04-15 05:13:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:42,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791179459] [2021-04-15 05:13:42,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416812805] [2021-04-15 05:13:42,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:42,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:42,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:42,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:42,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-04-15 05:13:42,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145173290] [2021-04-15 05:13:42,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:13:42,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:42,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:13:42,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:42,686 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:42,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:42,768 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-04-15 05:13:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:42,773 INFO L225 Difference]: With dead ends: 718 [2021-04-15 05:13:42,773 INFO L226 Difference]: Without dead ends: 681 [2021-04-15 05:13:42,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:13:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-04-15 05:13:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-04-15 05:13:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-04-15 05:13:42,784 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-04-15 05:13:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:42,784 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-04-15 05:13:42,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-04-15 05:13:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:42,786 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:42,786 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:43,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 05:13:43,001 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash 519546588, now seen corresponding path program 14 times [2021-04-15 05:13:43,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:43,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411835451] [2021-04-15 05:13:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:13:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411835451] [2021-04-15 05:13:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822879953] [2021-04-15 05:13:43,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:43,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:43,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:43,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 05:13:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:43,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:43,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-04-15 05:13:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137185542] [2021-04-15 05:13:43,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:13:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:43,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:13:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:13:43,186 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:43,272 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-04-15 05:13:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:43,275 INFO L225 Difference]: With dead ends: 722 [2021-04-15 05:13:43,276 INFO L226 Difference]: Without dead ends: 682 [2021-04-15 05:13:43,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:13:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-04-15 05:13:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-04-15 05:13:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-04-15 05:13:43,288 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-04-15 05:13:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:43,288 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-04-15 05:13:43,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-04-15 05:13:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:13:43,290 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:43,290 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:43,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-04-15 05:13:43,507 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:43,507 INFO L82 PathProgramCache]: Analyzing trace with hash 663834170, now seen corresponding path program 15 times [2021-04-15 05:13:43,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:43,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141170416] [2021-04-15 05:13:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:43,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141170416] [2021-04-15 05:13:43,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164196879] [2021-04-15 05:13:43,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:43,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:13:43,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:43,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:43,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-04-15 05:13:43,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875416448] [2021-04-15 05:13:43,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:13:43,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:13:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:13:43,746 INFO L87 Difference]: Start difference. First operand 573 states and 1513 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:43,838 INFO L93 Difference]: Finished difference Result 765 states and 1984 transitions. [2021-04-15 05:13:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:13:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:43,840 INFO L225 Difference]: With dead ends: 765 [2021-04-15 05:13:43,840 INFO L226 Difference]: Without dead ends: 727 [2021-04-15 05:13:43,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-04-15 05:13:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 543. [2021-04-15 05:13:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-04-15 05:13:43,850 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-04-15 05:13:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:43,851 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-04-15 05:13:43,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-04-15 05:13:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:43,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:43,852 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:44,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:44,075 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1075166198, now seen corresponding path program 16 times [2021-04-15 05:13:44,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:44,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995905802] [2021-04-15 05:13:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:44,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995905802] [2021-04-15 05:13:44,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464592082] [2021-04-15 05:13:44,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:44,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:44,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:44,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:44,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:44,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:44,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:13:44,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066639379] [2021-04-15 05:13:44,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:13:44,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:44,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:13:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:13:44,218 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:44,325 INFO L93 Difference]: Finished difference Result 992 states and 2597 transitions. [2021-04-15 05:13:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:44,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-04-15 05:13:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:44,328 INFO L225 Difference]: With dead ends: 992 [2021-04-15 05:13:44,328 INFO L226 Difference]: Without dead ends: 992 [2021-04-15 05:13:44,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:44,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-04-15 05:13:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 587. [2021-04-15 05:13:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.66382252559727) internal successors, (1561), 586 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1561 transitions. [2021-04-15 05:13:44,354 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1561 transitions. Word has length 31 [2021-04-15 05:13:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:44,354 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1561 transitions. [2021-04-15 05:13:44,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1561 transitions. [2021-04-15 05:13:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:44,355 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:44,355 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:44,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 05:13:44,573 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1496697428, now seen corresponding path program 17 times [2021-04-15 05:13:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:44,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440314504] [2021-04-15 05:13:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:44,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440314504] [2021-04-15 05:13:44,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632019616] [2021-04-15 05:13:44,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:44,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:13:44,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:44,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:44,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:44,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:13:44,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651110817] [2021-04-15 05:13:44,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:13:44,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:44,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:13:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:13:44,681 INFO L87 Difference]: Start difference. First operand 587 states and 1561 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:44,764 INFO L93 Difference]: Finished difference Result 1042 states and 2731 transitions. [2021-04-15 05:13:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-04-15 05:13:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:44,768 INFO L225 Difference]: With dead ends: 1042 [2021-04-15 05:13:44,768 INFO L226 Difference]: Without dead ends: 997 [2021-04-15 05:13:44,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-04-15 05:13:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 587. [2021-04-15 05:13:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.651877133105802) internal successors, (1554), 586 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1554 transitions. [2021-04-15 05:13:44,782 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1554 transitions. Word has length 31 [2021-04-15 05:13:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:44,783 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1554 transitions. [2021-04-15 05:13:44,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1554 transitions. [2021-04-15 05:13:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:44,784 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:44,785 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:45,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 05:13:45,007 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:45,008 INFO L82 PathProgramCache]: Analyzing trace with hash 73958184, now seen corresponding path program 18 times [2021-04-15 05:13:45,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:45,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528007844] [2021-04-15 05:13:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:45,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528007844] [2021-04-15 05:13:45,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071088539] [2021-04-15 05:13:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:45,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:13:45,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:45,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:45,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:45,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:45,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317918953] [2021-04-15 05:13:45,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:45,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:45,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:45,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:45,132 INFO L87 Difference]: Start difference. First operand 587 states and 1554 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:45,355 INFO L93 Difference]: Finished difference Result 2039 states and 5214 transitions. [2021-04-15 05:13:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:13:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:45,362 INFO L225 Difference]: With dead ends: 2039 [2021-04-15 05:13:45,362 INFO L226 Difference]: Without dead ends: 2039 [2021-04-15 05:13:45,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:13:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-04-15 05:13:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 884. [2021-04-15 05:13:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.7633069082672708) internal successors, (2440), 883 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2440 transitions. [2021-04-15 05:13:45,383 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2440 transitions. Word has length 31 [2021-04-15 05:13:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:45,384 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2440 transitions. [2021-04-15 05:13:45,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2440 transitions. [2021-04-15 05:13:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:45,386 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:45,386 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:45,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:45,602 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash -136738862, now seen corresponding path program 19 times [2021-04-15 05:13:45,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:45,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484716749] [2021-04-15 05:13:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:45,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484716749] [2021-04-15 05:13:45,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908780470] [2021-04-15 05:13:45,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:45,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:45,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:45,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85318700] [2021-04-15 05:13:45,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:45,743 INFO L87 Difference]: Start difference. First operand 884 states and 2440 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:45,938 INFO L93 Difference]: Finished difference Result 1980 states and 5236 transitions. [2021-04-15 05:13:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:13:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:45,943 INFO L225 Difference]: With dead ends: 1980 [2021-04-15 05:13:45,943 INFO L226 Difference]: Without dead ends: 1968 [2021-04-15 05:13:45,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:13:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-04-15 05:13:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1100. [2021-04-15 05:13:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.808007279344859) internal successors, (3086), 1099 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3086 transitions. [2021-04-15 05:13:45,965 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3086 transitions. Word has length 31 [2021-04-15 05:13:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:45,965 INFO L480 AbstractCegarLoop]: Abstraction has 1100 states and 3086 transitions. [2021-04-15 05:13:45,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3086 transitions. [2021-04-15 05:13:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:45,968 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:45,968 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:46,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 05:13:46,189 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:46,190 INFO L82 PathProgramCache]: Analyzing trace with hash 592012956, now seen corresponding path program 20 times [2021-04-15 05:13:46,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:46,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954119014] [2021-04-15 05:13:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:46,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954119014] [2021-04-15 05:13:46,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026913788] [2021-04-15 05:13:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:46,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:46,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:46,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740250885] [2021-04-15 05:13:46,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:46,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:46,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:46,330 INFO L87 Difference]: Start difference. First operand 1100 states and 3086 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:46,610 INFO L93 Difference]: Finished difference Result 2053 states and 5419 transitions. [2021-04-15 05:13:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:13:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:46,614 INFO L225 Difference]: With dead ends: 2053 [2021-04-15 05:13:46,614 INFO L226 Difference]: Without dead ends: 2053 [2021-04-15 05:13:46,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:13:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-04-15 05:13:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1104. [2021-04-15 05:13:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 2.8068902991840434) internal successors, (3096), 1103 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3096 transitions. [2021-04-15 05:13:46,634 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3096 transitions. Word has length 31 [2021-04-15 05:13:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:46,634 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 3096 transitions. [2021-04-15 05:13:46,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3096 transitions. [2021-04-15 05:13:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:46,636 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:46,636 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:46,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:46,837 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash 215041802, now seen corresponding path program 21 times [2021-04-15 05:13:46,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:46,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261434851] [2021-04-15 05:13:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:46,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261434851] [2021-04-15 05:13:46,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684448177] [2021-04-15 05:13:46,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:46,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:13:46,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:46,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:46,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788179130] [2021-04-15 05:13:46,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:46,955 INFO L87 Difference]: Start difference. First operand 1104 states and 3096 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:47,178 INFO L93 Difference]: Finished difference Result 2247 states and 5856 transitions. [2021-04-15 05:13:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:47,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:47,184 INFO L225 Difference]: With dead ends: 2247 [2021-04-15 05:13:47,184 INFO L226 Difference]: Without dead ends: 2233 [2021-04-15 05:13:47,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:13:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-04-15 05:13:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1111. [2021-04-15 05:13:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 2.791891891891892) internal successors, (3099), 1110 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3099 transitions. [2021-04-15 05:13:47,213 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3099 transitions. Word has length 31 [2021-04-15 05:13:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:47,213 INFO L480 AbstractCegarLoop]: Abstraction has 1111 states and 3099 transitions. [2021-04-15 05:13:47,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3099 transitions. [2021-04-15 05:13:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:47,215 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:47,215 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:47,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 05:13:47,429 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash 299440576, now seen corresponding path program 22 times [2021-04-15 05:13:47,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:47,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444340150] [2021-04-15 05:13:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:47,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444340150] [2021-04-15 05:13:47,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136468668] [2021-04-15 05:13:47,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:47,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:47,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:47,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:47,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812190583] [2021-04-15 05:13:47,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:47,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:47,542 INFO L87 Difference]: Start difference. First operand 1111 states and 3099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:47,676 INFO L93 Difference]: Finished difference Result 1836 states and 4940 transitions. [2021-04-15 05:13:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:13:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:47,679 INFO L225 Difference]: With dead ends: 1836 [2021-04-15 05:13:47,679 INFO L226 Difference]: Without dead ends: 1808 [2021-04-15 05:13:47,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:13:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-04-15 05:13:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1121. [2021-04-15 05:13:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.775) internal successors, (3108), 1120 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3108 transitions. [2021-04-15 05:13:47,700 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3108 transitions. Word has length 31 [2021-04-15 05:13:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:47,700 INFO L480 AbstractCegarLoop]: Abstraction has 1121 states and 3108 transitions. [2021-04-15 05:13:47,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3108 transitions. [2021-04-15 05:13:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:47,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:47,702 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:47,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 05:13:47,907 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:47,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2072647434, now seen corresponding path program 23 times [2021-04-15 05:13:47,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:47,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109042729] [2021-04-15 05:13:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:47,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109042729] [2021-04-15 05:13:47,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077779140] [2021-04-15 05:13:47,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:47,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:13:47,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:48,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:48,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 05:13:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068686124] [2021-04-15 05:13:48,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:13:48,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:48,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:13:48,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:13:48,058 INFO L87 Difference]: Start difference. First operand 1121 states and 3108 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:48,290 INFO L93 Difference]: Finished difference Result 2462 states and 6556 transitions. [2021-04-15 05:13:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:13:48,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:48,297 INFO L225 Difference]: With dead ends: 2462 [2021-04-15 05:13:48,297 INFO L226 Difference]: Without dead ends: 2408 [2021-04-15 05:13:48,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:13:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-04-15 05:13:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1441. [2021-04-15 05:13:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 2.8208333333333333) internal successors, (4062), 1440 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4062 transitions. [2021-04-15 05:13:48,361 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4062 transitions. Word has length 31 [2021-04-15 05:13:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:48,361 INFO L480 AbstractCegarLoop]: Abstraction has 1441 states and 4062 transitions. [2021-04-15 05:13:48,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4062 transitions. [2021-04-15 05:13:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:48,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:48,364 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:48,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 05:13:48,588 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1805660222, now seen corresponding path program 24 times [2021-04-15 05:13:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:48,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858703710] [2021-04-15 05:13:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:48,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858703710] [2021-04-15 05:13:48,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375093996] [2021-04-15 05:13:48,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:48,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:13:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:48,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:48,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 05:13:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863553228] [2021-04-15 05:13:48,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:48,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:48,725 INFO L87 Difference]: Start difference. First operand 1441 states and 4062 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:48,912 INFO L93 Difference]: Finished difference Result 2786 states and 7510 transitions. [2021-04-15 05:13:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:13:48,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:48,918 INFO L225 Difference]: With dead ends: 2786 [2021-04-15 05:13:48,918 INFO L226 Difference]: Without dead ends: 2786 [2021-04-15 05:13:48,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:13:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-04-15 05:13:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1845. [2021-04-15 05:13:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 2.828633405639913) internal successors, (5216), 1844 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 5216 transitions. [2021-04-15 05:13:48,957 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 5216 transitions. Word has length 31 [2021-04-15 05:13:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:48,957 INFO L480 AbstractCegarLoop]: Abstraction has 1845 states and 5216 transitions. [2021-04-15 05:13:48,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 5216 transitions. [2021-04-15 05:13:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:48,960 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:48,961 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:49,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:49,174 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:49,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1164137342, now seen corresponding path program 25 times [2021-04-15 05:13:49,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:49,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883301209] [2021-04-15 05:13:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:49,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883301209] [2021-04-15 05:13:49,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591440416] [2021-04-15 05:13:49,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:49,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:49,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:49,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:13:49,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907209462] [2021-04-15 05:13:49,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:13:49,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:13:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:13:49,278 INFO L87 Difference]: Start difference. First operand 1845 states and 5216 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:49,377 INFO L93 Difference]: Finished difference Result 2330 states and 6455 transitions. [2021-04-15 05:13:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:49,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-04-15 05:13:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:49,383 INFO L225 Difference]: With dead ends: 2330 [2021-04-15 05:13:49,383 INFO L226 Difference]: Without dead ends: 2330 [2021-04-15 05:13:49,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-04-15 05:13:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1887. [2021-04-15 05:13:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.829798515376458) internal successors, (5337), 1886 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5337 transitions. [2021-04-15 05:13:49,417 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5337 transitions. Word has length 31 [2021-04-15 05:13:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:49,418 INFO L480 AbstractCegarLoop]: Abstraction has 1887 states and 5337 transitions. [2021-04-15 05:13:49,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5337 transitions. [2021-04-15 05:13:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:49,422 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:49,422 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:49,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 05:13:49,643 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1736902034, now seen corresponding path program 26 times [2021-04-15 05:13:49,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:49,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230396278] [2021-04-15 05:13:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230396278] [2021-04-15 05:13:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014237758] [2021-04-15 05:13:49,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:13:49,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:49,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:49,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:49,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:49,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:49,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:13:49,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134537710] [2021-04-15 05:13:49,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:13:49,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:49,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:13:49,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:13:49,749 INFO L87 Difference]: Start difference. First operand 1887 states and 5337 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:49,836 INFO L93 Difference]: Finished difference Result 2501 states and 6932 transitions. [2021-04-15 05:13:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:13:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-04-15 05:13:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:49,840 INFO L225 Difference]: With dead ends: 2501 [2021-04-15 05:13:49,840 INFO L226 Difference]: Without dead ends: 2465 [2021-04-15 05:13:49,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:13:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-04-15 05:13:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1887. [2021-04-15 05:13:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.8266171792152703) internal successors, (5331), 1886 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5331 transitions. [2021-04-15 05:13:49,872 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5331 transitions. Word has length 31 [2021-04-15 05:13:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:49,872 INFO L480 AbstractCegarLoop]: Abstraction has 1887 states and 5331 transitions. [2021-04-15 05:13:49,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-04-15 05:13:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5331 transitions. [2021-04-15 05:13:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:49,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:49,878 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:50,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:50,093 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:50,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1310615324, now seen corresponding path program 27 times [2021-04-15 05:13:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:50,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100214826] [2021-04-15 05:13:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:50,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100214826] [2021-04-15 05:13:50,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608665900] [2021-04-15 05:13:50,124 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 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 [2021-04-15 05:13:50,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:13:50,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:50,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:50,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:50,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682031550] [2021-04-15 05:13:50,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:50,240 INFO L87 Difference]: Start difference. First operand 1887 states and 5331 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:50,396 INFO L93 Difference]: Finished difference Result 2490 states and 6843 transitions. [2021-04-15 05:13:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:13:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:50,400 INFO L225 Difference]: With dead ends: 2490 [2021-04-15 05:13:50,400 INFO L226 Difference]: Without dead ends: 2490 [2021-04-15 05:13:50,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-04-15 05:13:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2067. [2021-04-15 05:13:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.8330106485963213) internal successors, (5853), 2066 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5853 transitions. [2021-04-15 05:13:50,431 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5853 transitions. Word has length 31 [2021-04-15 05:13:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:50,431 INFO L480 AbstractCegarLoop]: Abstraction has 2067 states and 5853 transitions. [2021-04-15 05:13:50,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5853 transitions. [2021-04-15 05:13:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:50,435 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:50,435 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:50,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 05:13:50,656 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1055874042, now seen corresponding path program 28 times [2021-04-15 05:13:50,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:50,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608535909] [2021-04-15 05:13:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:50,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608535909] [2021-04-15 05:13:50,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405813278] [2021-04-15 05:13:50,683 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 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 [2021-04-15 05:13:50,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:50,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:50,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:50,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:50,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:50,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498565545] [2021-04-15 05:13:50,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:50,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:50,787 INFO L87 Difference]: Start difference. First operand 2067 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:50,947 INFO L93 Difference]: Finished difference Result 2862 states and 7833 transitions. [2021-04-15 05:13:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:13:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:50,952 INFO L225 Difference]: With dead ends: 2862 [2021-04-15 05:13:50,952 INFO L226 Difference]: Without dead ends: 2838 [2021-04-15 05:13:50,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:13:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-04-15 05:13:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2147. [2021-04-15 05:13:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.8355079217148185) internal successors, (6085), 2146 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6085 transitions. [2021-04-15 05:13:50,994 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6085 transitions. Word has length 31 [2021-04-15 05:13:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:50,994 INFO L480 AbstractCegarLoop]: Abstraction has 2147 states and 6085 transitions. [2021-04-15 05:13:50,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6085 transitions. [2021-04-15 05:13:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:50,998 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:50,998 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:51,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 05:13:51,220 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash -276839870, now seen corresponding path program 29 times [2021-04-15 05:13:51,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:51,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031295338] [2021-04-15 05:13:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:51,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031295338] [2021-04-15 05:13:51,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811753004] [2021-04-15 05:13:51,246 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:51,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:13:51,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:51,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:51,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:51,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:51,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356682098] [2021-04-15 05:13:51,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:51,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:51,347 INFO L87 Difference]: Start difference. First operand 2147 states and 6085 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:51,550 INFO L93 Difference]: Finished difference Result 3330 states and 8999 transitions. [2021-04-15 05:13:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:13:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:51,554 INFO L225 Difference]: With dead ends: 3330 [2021-04-15 05:13:51,554 INFO L226 Difference]: Without dead ends: 3330 [2021-04-15 05:13:51,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:13:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-04-15 05:13:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2317. [2021-04-15 05:13:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 2.8626943005181347) internal successors, (6630), 2316 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 6630 transitions. [2021-04-15 05:13:51,597 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 6630 transitions. Word has length 31 [2021-04-15 05:13:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:51,597 INFO L480 AbstractCegarLoop]: Abstraction has 2317 states and 6630 transitions. [2021-04-15 05:13:51,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 6630 transitions. [2021-04-15 05:13:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:51,601 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:51,601 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:51,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 05:13:51,821 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash -487536916, now seen corresponding path program 30 times [2021-04-15 05:13:51,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:51,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447059834] [2021-04-15 05:13:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:51,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447059834] [2021-04-15 05:13:51,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260302509] [2021-04-15 05:13:51,849 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 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 [2021-04-15 05:13:51,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 05:13:51,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:51,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:51,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:51,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907413768] [2021-04-15 05:13:51,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:51,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:51,988 INFO L87 Difference]: Start difference. First operand 2317 states and 6630 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:52,188 INFO L93 Difference]: Finished difference Result 3536 states and 9738 transitions. [2021-04-15 05:13:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:52,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:52,193 INFO L225 Difference]: With dead ends: 3536 [2021-04-15 05:13:52,193 INFO L226 Difference]: Without dead ends: 3524 [2021-04-15 05:13:52,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:13:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-04-15 05:13:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 2553. [2021-04-15 05:13:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.865203761755486) internal successors, (7312), 2552 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7312 transitions. [2021-04-15 05:13:52,242 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7312 transitions. Word has length 31 [2021-04-15 05:13:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:52,242 INFO L480 AbstractCegarLoop]: Abstraction has 2553 states and 7312 transitions. [2021-04-15 05:13:52,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7312 transitions. [2021-04-15 05:13:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:52,246 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:52,246 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:52,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 05:13:52,461 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash 241214902, now seen corresponding path program 31 times [2021-04-15 05:13:52,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:52,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101992479] [2021-04-15 05:13:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:52,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101992479] [2021-04-15 05:13:52,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57434449] [2021-04-15 05:13:52,485 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 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 [2021-04-15 05:13:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:52,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:52,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:52,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572298779] [2021-04-15 05:13:52,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:52,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:52,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:52,595 INFO L87 Difference]: Start difference. First operand 2553 states and 7312 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:52,807 INFO L93 Difference]: Finished difference Result 3564 states and 9736 transitions. [2021-04-15 05:13:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:13:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:52,811 INFO L225 Difference]: With dead ends: 3564 [2021-04-15 05:13:52,811 INFO L226 Difference]: Without dead ends: 3564 [2021-04-15 05:13:52,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:13:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-04-15 05:13:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2557. [2021-04-15 05:13:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2556 states have (on average 2.856025039123631) internal successors, (7300), 2556 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 7300 transitions. [2021-04-15 05:13:52,865 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 7300 transitions. Word has length 31 [2021-04-15 05:13:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:52,865 INFO L480 AbstractCegarLoop]: Abstraction has 2557 states and 7300 transitions. [2021-04-15 05:13:52,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 7300 transitions. [2021-04-15 05:13:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:52,870 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:52,870 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:53,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 05:13:53,091 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:53,092 INFO L82 PathProgramCache]: Analyzing trace with hash -135756252, now seen corresponding path program 32 times [2021-04-15 05:13:53,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:53,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562581477] [2021-04-15 05:13:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:53,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562581477] [2021-04-15 05:13:53,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095635475] [2021-04-15 05:13:53,116 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:53,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:53,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:53,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:53,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:13:53,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410138050] [2021-04-15 05:13:53,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:53,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:53,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:53,201 INFO L87 Difference]: Start difference. First operand 2557 states and 7300 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:53,372 INFO L93 Difference]: Finished difference Result 3120 states and 8617 transitions. [2021-04-15 05:13:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:13:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:53,376 INFO L225 Difference]: With dead ends: 3120 [2021-04-15 05:13:53,376 INFO L226 Difference]: Without dead ends: 3106 [2021-04-15 05:13:53,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:13:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-04-15 05:13:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2571. [2021-04-15 05:13:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2570 states have (on average 2.849805447470817) internal successors, (7324), 2570 states have internal predecessors, (7324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 7324 transitions. [2021-04-15 05:13:53,422 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 7324 transitions. Word has length 31 [2021-04-15 05:13:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:53,422 INFO L480 AbstractCegarLoop]: Abstraction has 2571 states and 7324 transitions. [2021-04-15 05:13:53,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 7324 transitions. [2021-04-15 05:13:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:53,425 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:53,426 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:53,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 05:13:53,626 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2133092770, now seen corresponding path program 33 times [2021-04-15 05:13:53,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:53,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071138903] [2021-04-15 05:13:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:53,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071138903] [2021-04-15 05:13:53,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081260826] [2021-04-15 05:13:53,653 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:53,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:13:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:53,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:53,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 05:13:53,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876375490] [2021-04-15 05:13:53,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:13:53,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:13:53,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:13:53,742 INFO L87 Difference]: Start difference. First operand 2571 states and 7324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-04-15 05:13:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:53,935 INFO L93 Difference]: Finished difference Result 3644 states and 10056 transitions. [2021-04-15 05:13:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:13:53,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 31 [2021-04-15 05:13:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:53,939 INFO L225 Difference]: With dead ends: 3644 [2021-04-15 05:13:53,939 INFO L226 Difference]: Without dead ends: 3644 [2021-04-15 05:13:53,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:13:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-04-15 05:13:53,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2693. [2021-04-15 05:13:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.846582466567608) internal successors, (7663), 2692 states have internal predecessors, (7663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7663 transitions. [2021-04-15 05:13:53,975 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7663 transitions. Word has length 31 [2021-04-15 05:13:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:53,976 INFO L480 AbstractCegarLoop]: Abstraction has 2693 states and 7663 transitions. [2021-04-15 05:13:53,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-04-15 05:13:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7663 transitions. [2021-04-15 05:13:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:53,980 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:53,981 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:54,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-04-15 05:13:54,191 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1233797400, now seen corresponding path program 34 times [2021-04-15 05:13:54,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:54,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164566000] [2021-04-15 05:13:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164566000] [2021-04-15 05:13:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909756660] [2021-04-15 05:13:54,221 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:54,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:54,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:54,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:54,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:54,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:54,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 05:13:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586772863] [2021-04-15 05:13:54,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:54,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:54,305 INFO L87 Difference]: Start difference. First operand 2693 states and 7663 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-04-15 05:13:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:54,502 INFO L93 Difference]: Finished difference Result 4193 states and 11519 transitions. [2021-04-15 05:13:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:13:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 31 [2021-04-15 05:13:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:54,507 INFO L225 Difference]: With dead ends: 4193 [2021-04-15 05:13:54,507 INFO L226 Difference]: Without dead ends: 4193 [2021-04-15 05:13:54,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:13:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-04-15 05:13:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3161. [2021-04-15 05:13:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 2.854113924050633) internal successors, (9019), 3160 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 9019 transitions. [2021-04-15 05:13:54,550 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 9019 transitions. Word has length 31 [2021-04-15 05:13:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:54,550 INFO L480 AbstractCegarLoop]: Abstraction has 3161 states and 9019 transitions. [2021-04-15 05:13:54,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-04-15 05:13:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 9019 transitions. [2021-04-15 05:13:54,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:54,556 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:54,556 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:54,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:54,771 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:54,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1092713782, now seen corresponding path program 35 times [2021-04-15 05:13:54,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:54,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896573658] [2021-04-15 05:13:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:13:54,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896573658] [2021-04-15 05:13:54,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990950090] [2021-04-15 05:13:54,791 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:54,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:13:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:54,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:54,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:54,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:54,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 05:13:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955875655] [2021-04-15 05:13:54,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:13:54,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:13:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:13:54,895 INFO L87 Difference]: Start difference. First operand 3161 states and 9019 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:55,074 INFO L93 Difference]: Finished difference Result 4026 states and 11093 transitions. [2021-04-15 05:13:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:13:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:55,079 INFO L225 Difference]: With dead ends: 4026 [2021-04-15 05:13:55,079 INFO L226 Difference]: Without dead ends: 4012 [2021-04-15 05:13:55,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:13:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-04-15 05:13:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3057. [2021-04-15 05:13:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3056 states have (on average 2.8406413612565444) internal successors, (8681), 3056 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8681 transitions. [2021-04-15 05:13:55,119 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8681 transitions. Word has length 31 [2021-04-15 05:13:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:55,119 INFO L480 AbstractCegarLoop]: Abstraction has 3057 states and 8681 transitions. [2021-04-15 05:13:55,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8681 transitions. [2021-04-15 05:13:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:13:55,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:55,122 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-04-15 05:13:55,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:55,323 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:55,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:55,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1008315008, now seen corresponding path program 36 times [2021-04-15 05:13:55,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:55,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094007752] [2021-04-15 05:13:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:55,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094007752] [2021-04-15 05:13:55,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972396005] [2021-04-15 05:13:55,362 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:55,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:13:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:13:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:55,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:55,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 05:13:55,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79082678] [2021-04-15 05:13:55,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:13:55,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:55,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:13:55,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:13:55,474 INFO L87 Difference]: Start difference. First operand 3057 states and 8681 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:55,650 INFO L93 Difference]: Finished difference Result 4063 states and 11292 transitions. [2021-04-15 05:13:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:13:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:13:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:55,655 INFO L225 Difference]: With dead ends: 4063 [2021-04-15 05:13:55,655 INFO L226 Difference]: Without dead ends: 4007 [2021-04-15 05:13:55,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:13:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-04-15 05:13:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3327. [2021-04-15 05:13:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.850871918220084) internal successors, (9482), 3326 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9482 transitions. [2021-04-15 05:13:55,699 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9482 transitions. Word has length 31 [2021-04-15 05:13:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:55,699 INFO L480 AbstractCegarLoop]: Abstraction has 3327 states and 9482 transitions. [2021-04-15 05:13:55,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9482 transitions. [2021-04-15 05:13:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:13:55,703 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:55,703 INFO L551 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] [2021-04-15 05:13:55,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:55,904 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash 225377440, now seen corresponding path program 37 times [2021-04-15 05:13:55,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:55,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209134096] [2021-04-15 05:13:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:56,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209134096] [2021-04-15 05:13:56,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611045519] [2021-04-15 05:13:56,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:56,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:56,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:56,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-04-15 05:13:56,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258402502] [2021-04-15 05:13:56,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:13:56,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:56,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:13:56,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:13:56,300 INFO L87 Difference]: Start difference. First operand 3327 states and 9482 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:56,478 INFO L93 Difference]: Finished difference Result 5088 states and 14550 transitions. [2021-04-15 05:13:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:13:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:56,484 INFO L225 Difference]: With dead ends: 5088 [2021-04-15 05:13:56,485 INFO L226 Difference]: Without dead ends: 5050 [2021-04-15 05:13:56,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-04-15 05:13:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3355. [2021-04-15 05:13:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.8449612403100777) internal successors, (9542), 3354 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 9542 transitions. [2021-04-15 05:13:56,529 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 9542 transitions. Word has length 34 [2021-04-15 05:13:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:56,530 INFO L480 AbstractCegarLoop]: Abstraction has 3355 states and 9542 transitions. [2021-04-15 05:13:56,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 9542 transitions. [2021-04-15 05:13:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:13:56,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:56,534 INFO L551 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] [2021-04-15 05:13:56,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 05:13:56,735 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash -236314294, now seen corresponding path program 38 times [2021-04-15 05:13:56,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:56,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285910417] [2021-04-15 05:13:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:56,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285910417] [2021-04-15 05:13:56,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875303512] [2021-04-15 05:13:56,844 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:56,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:56,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:57,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:57,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:13:57,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528395799] [2021-04-15 05:13:57,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:13:57,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:57,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:13:57,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:13:57,052 INFO L87 Difference]: Start difference. First operand 3355 states and 9542 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:57,308 INFO L93 Difference]: Finished difference Result 6932 states and 19936 transitions. [2021-04-15 05:13:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:13:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:57,318 INFO L225 Difference]: With dead ends: 6932 [2021-04-15 05:13:57,318 INFO L226 Difference]: Without dead ends: 6850 [2021-04-15 05:13:57,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:13:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-04-15 05:13:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 4710. [2021-04-15 05:13:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 4709 states have (on average 2.8789551921851775) internal successors, (13557), 4709 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 13557 transitions. [2021-04-15 05:13:57,388 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 13557 transitions. Word has length 34 [2021-04-15 05:13:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:57,388 INFO L480 AbstractCegarLoop]: Abstraction has 4710 states and 13557 transitions. [2021-04-15 05:13:57,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 13557 transitions. [2021-04-15 05:13:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:13:57,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:57,394 INFO L551 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] [2021-04-15 05:13:57,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:57,594 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash 359791622, now seen corresponding path program 39 times [2021-04-15 05:13:57,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:57,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923041015] [2021-04-15 05:13:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:57,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923041015] [2021-04-15 05:13:57,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792253820] [2021-04-15 05:13:57,697 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:57,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:13:57,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:57,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:57,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:57,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:57,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:13:57,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666728338] [2021-04-15 05:13:57,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:13:57,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:57,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:13:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:13:57,950 INFO L87 Difference]: Start difference. First operand 4710 states and 13557 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:58,217 INFO L93 Difference]: Finished difference Result 6936 states and 19938 transitions. [2021-04-15 05:13:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:13:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:58,228 INFO L225 Difference]: With dead ends: 6936 [2021-04-15 05:13:58,228 INFO L226 Difference]: Without dead ends: 6824 [2021-04-15 05:13:58,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:13:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-04-15 05:13:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 4404. [2021-04-15 05:13:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.865319100613218) internal successors, (12616), 4403 states have internal predecessors, (12616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12616 transitions. [2021-04-15 05:13:58,297 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12616 transitions. Word has length 34 [2021-04-15 05:13:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:58,298 INFO L480 AbstractCegarLoop]: Abstraction has 4404 states and 12616 transitions. [2021-04-15 05:13:58,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12616 transitions. [2021-04-15 05:13:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:13:58,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:58,304 INFO L551 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] [2021-04-15 05:13:58,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 05:13:58,504 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -697731906, now seen corresponding path program 40 times [2021-04-15 05:13:58,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:58,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839081471] [2021-04-15 05:13:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:58,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839081471] [2021-04-15 05:13:58,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817729053] [2021-04-15 05:13:58,619 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:58,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:58,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:58,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-04-15 05:13:58,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746652062] [2021-04-15 05:13:58,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:13:58,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:58,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:13:58,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:58,835 INFO L87 Difference]: Start difference. First operand 4404 states and 12616 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:59,064 INFO L93 Difference]: Finished difference Result 6717 states and 19331 transitions. [2021-04-15 05:13:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:13:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:13:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:59,074 INFO L225 Difference]: With dead ends: 6717 [2021-04-15 05:13:59,074 INFO L226 Difference]: Without dead ends: 6641 [2021-04-15 05:13:59,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:13:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-04-15 05:13:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4682. [2021-04-15 05:13:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4682 states, 4681 states have (on average 2.87267677846614) internal successors, (13447), 4681 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4682 states to 4682 states and 13447 transitions. [2021-04-15 05:13:59,163 INFO L78 Accepts]: Start accepts. Automaton has 4682 states and 13447 transitions. Word has length 34 [2021-04-15 05:13:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:59,164 INFO L480 AbstractCegarLoop]: Abstraction has 4682 states and 13447 transitions. [2021-04-15 05:13:59,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4682 states and 13447 transitions. [2021-04-15 05:13:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:13:59,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:59,208 INFO L551 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] [2021-04-15 05:13:59,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-04-15 05:13:59,409 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 480842916, now seen corresponding path program 41 times [2021-04-15 05:13:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:59,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645474220] [2021-04-15 05:13:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:59,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645474220] [2021-04-15 05:13:59,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507314694] [2021-04-15 05:13:59,545 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:13:59,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:13:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:13:59,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:59,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:59,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:13:59,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296292093] [2021-04-15 05:13:59,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:13:59,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:59,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:13:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:13:59,747 INFO L87 Difference]: Start difference. First operand 4682 states and 13447 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:59,949 INFO L93 Difference]: Finished difference Result 6651 states and 19193 transitions. [2021-04-15 05:13:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:13:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:13:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:59,961 INFO L225 Difference]: With dead ends: 6651 [2021-04-15 05:13:59,961 INFO L226 Difference]: Without dead ends: 6613 [2021-04-15 05:13:59,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-04-15 05:14:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4704. [2021-04-15 05:14:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 2.8730597490963214) internal successors, (13512), 4703 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 13512 transitions. [2021-04-15 05:14:00,057 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 13512 transitions. Word has length 34 [2021-04-15 05:14:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:00,057 INFO L480 AbstractCegarLoop]: Abstraction has 4704 states and 13512 transitions. [2021-04-15 05:14:00,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 13512 transitions. [2021-04-15 05:14:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:00,064 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:00,064 INFO L551 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] [2021-04-15 05:14:00,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:00,281 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1249457240, now seen corresponding path program 42 times [2021-04-15 05:14:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:00,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964522572] [2021-04-15 05:14:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:00,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964522572] [2021-04-15 05:14:00,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988545] [2021-04-15 05:14:00,401 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:00,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:14:00,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:00,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:00,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:14:00,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222273958] [2021-04-15 05:14:00,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:00,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:00,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:00,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:00,657 INFO L87 Difference]: Start difference. First operand 4704 states and 13512 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:00,890 INFO L93 Difference]: Finished difference Result 7154 states and 20494 transitions. [2021-04-15 05:14:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:14:00,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:00,898 INFO L225 Difference]: With dead ends: 7154 [2021-04-15 05:14:00,899 INFO L226 Difference]: Without dead ends: 7052 [2021-04-15 05:14:00,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:14:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2021-04-15 05:14:01,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 6468. [2021-04-15 05:14:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 2.9008813978660895) internal successors, (18760), 6467 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 18760 transitions. [2021-04-15 05:14:01,033 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 18760 transitions. Word has length 34 [2021-04-15 05:14:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:01,033 INFO L480 AbstractCegarLoop]: Abstraction has 6468 states and 18760 transitions. [2021-04-15 05:14:01,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 18760 transitions. [2021-04-15 05:14:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:01,043 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:01,044 INFO L551 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] [2021-04-15 05:14:01,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-04-15 05:14:01,244 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1769005992, now seen corresponding path program 43 times [2021-04-15 05:14:01,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:01,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475703461] [2021-04-15 05:14:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:01,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475703461] [2021-04-15 05:14:01,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381599799] [2021-04-15 05:14:01,343 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:01,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:01,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:01,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-04-15 05:14:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633061608] [2021-04-15 05:14:01,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:01,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:01,578 INFO L87 Difference]: Start difference. First operand 6468 states and 18760 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:01,819 INFO L93 Difference]: Finished difference Result 7452 states and 21366 transitions. [2021-04-15 05:14:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:14:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:01,833 INFO L225 Difference]: With dead ends: 7452 [2021-04-15 05:14:01,833 INFO L226 Difference]: Without dead ends: 7330 [2021-04-15 05:14:01,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:14:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-04-15 05:14:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 5896. [2021-04-15 05:14:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 2.891263782866836) internal successors, (17044), 5895 states have internal predecessors, (17044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 17044 transitions. [2021-04-15 05:14:01,927 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 17044 transitions. Word has length 34 [2021-04-15 05:14:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:01,927 INFO L480 AbstractCegarLoop]: Abstraction has 5896 states and 17044 transitions. [2021-04-15 05:14:01,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 17044 transitions. [2021-04-15 05:14:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:01,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:01,935 INFO L551 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] [2021-04-15 05:14:02,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:02,135 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash -218400736, now seen corresponding path program 44 times [2021-04-15 05:14:02,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:02,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463769979] [2021-04-15 05:14:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:02,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463769979] [2021-04-15 05:14:02,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739228308] [2021-04-15 05:14:02,232 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:02,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:02,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:02,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:02,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-04-15 05:14:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894224477] [2021-04-15 05:14:02,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:02,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:02,460 INFO L87 Difference]: Start difference. First operand 5896 states and 17044 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:02,706 INFO L93 Difference]: Finished difference Result 6556 states and 18704 transitions. [2021-04-15 05:14:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:02,715 INFO L225 Difference]: With dead ends: 6556 [2021-04-15 05:14:02,715 INFO L226 Difference]: Without dead ends: 6480 [2021-04-15 05:14:02,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-04-15 05:14:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5562. [2021-04-15 05:14:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.88563208056105) internal successors, (16047), 5561 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16047 transitions. [2021-04-15 05:14:02,821 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16047 transitions. Word has length 34 [2021-04-15 05:14:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:02,821 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 16047 transitions. [2021-04-15 05:14:02,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16047 transitions. [2021-04-15 05:14:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:02,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:02,830 INFO L551 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] [2021-04-15 05:14:03,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 05:14:03,034 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash -862511400, now seen corresponding path program 45 times [2021-04-15 05:14:03,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:03,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411848833] [2021-04-15 05:14:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:03,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411848833] [2021-04-15 05:14:03,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269278670] [2021-04-15 05:14:03,161 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:03,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:14:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:03,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:03,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:03,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:14:03,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260023556] [2021-04-15 05:14:03,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:03,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:03,376 INFO L87 Difference]: Start difference. First operand 5562 states and 16047 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:03,628 INFO L93 Difference]: Finished difference Result 6381 states and 18213 transitions. [2021-04-15 05:14:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:03,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:03,638 INFO L225 Difference]: With dead ends: 6381 [2021-04-15 05:14:03,638 INFO L226 Difference]: Without dead ends: 6305 [2021-04-15 05:14:03,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-04-15 05:14:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5827. [2021-04-15 05:14:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 5826 states have (on average 2.8884311706144867) internal successors, (16828), 5826 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 16828 transitions. [2021-04-15 05:14:03,721 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 16828 transitions. Word has length 34 [2021-04-15 05:14:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:03,721 INFO L480 AbstractCegarLoop]: Abstraction has 5827 states and 16828 transitions. [2021-04-15 05:14:03,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 16828 transitions. [2021-04-15 05:14:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:03,728 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:03,728 INFO L551 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] [2021-04-15 05:14:03,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:03,929 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1403446700, now seen corresponding path program 46 times [2021-04-15 05:14:03,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:03,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657922043] [2021-04-15 05:14:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:04,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657922043] [2021-04-15 05:14:04,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802808136] [2021-04-15 05:14:04,063 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:04,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:04,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:14:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:04,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:04,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:14:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79578764] [2021-04-15 05:14:04,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:04,348 INFO L87 Difference]: Start difference. First operand 5827 states and 16828 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:04,541 INFO L93 Difference]: Finished difference Result 7509 states and 21608 transitions. [2021-04-15 05:14:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:14:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:04,553 INFO L225 Difference]: With dead ends: 7509 [2021-04-15 05:14:04,553 INFO L226 Difference]: Without dead ends: 7419 [2021-04-15 05:14:04,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2021-04-15 05:14:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 7227. [2021-04-15 05:14:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7227 states, 7226 states have (on average 2.9022972598948242) internal successors, (20972), 7226 states have internal predecessors, (20972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7227 states to 7227 states and 20972 transitions. [2021-04-15 05:14:04,680 INFO L78 Accepts]: Start accepts. Automaton has 7227 states and 20972 transitions. Word has length 34 [2021-04-15 05:14:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:04,680 INFO L480 AbstractCegarLoop]: Abstraction has 7227 states and 20972 transitions. [2021-04-15 05:14:04,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7227 states and 20972 transitions. [2021-04-15 05:14:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:04,691 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:04,692 INFO L551 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] [2021-04-15 05:14:04,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:04,905 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash 180516264, now seen corresponding path program 47 times [2021-04-15 05:14:04,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:04,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579635084] [2021-04-15 05:14:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:04,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579635084] [2021-04-15 05:14:04,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157956243] [2021-04-15 05:14:04,985 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:05,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:14:05,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:14:05,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:05,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:05,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-04-15 05:14:05,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226275762] [2021-04-15 05:14:05,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:14:05,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:14:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:14:05,186 INFO L87 Difference]: Start difference. First operand 7227 states and 20972 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:05,336 INFO L93 Difference]: Finished difference Result 7681 states and 22109 transitions. [2021-04-15 05:14:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:14:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:05,349 INFO L225 Difference]: With dead ends: 7681 [2021-04-15 05:14:05,349 INFO L226 Difference]: Without dead ends: 7573 [2021-04-15 05:14:05,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-04-15 05:14:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7191. [2021-04-15 05:14:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 2.9009735744089014) internal successors, (20858), 7190 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 20858 transitions. [2021-04-15 05:14:05,474 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 20858 transitions. Word has length 34 [2021-04-15 05:14:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:05,474 INFO L480 AbstractCegarLoop]: Abstraction has 7191 states and 20858 transitions. [2021-04-15 05:14:05,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 20858 transitions. [2021-04-15 05:14:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:05,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:05,487 INFO L551 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] [2021-04-15 05:14:05,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-04-15 05:14:05,701 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 576311422, now seen corresponding path program 48 times [2021-04-15 05:14:05,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:05,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046974207] [2021-04-15 05:14:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:05,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046974207] [2021-04-15 05:14:05,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311744612] [2021-04-15 05:14:05,810 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:14:05,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:14:05,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:06,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:06,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-04-15 05:14:06,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919089196] [2021-04-15 05:14:06,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:06,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:06,099 INFO L87 Difference]: Start difference. First operand 7191 states and 20858 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:06,311 INFO L93 Difference]: Finished difference Result 8299 states and 23923 transitions. [2021-04-15 05:14:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:06,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:06,323 INFO L225 Difference]: With dead ends: 8299 [2021-04-15 05:14:06,323 INFO L226 Difference]: Without dead ends: 8182 [2021-04-15 05:14:06,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-04-15 05:14:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7911. [2021-04-15 05:14:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7910 states have (on average 2.9107458912768647) internal successors, (23024), 7910 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 23024 transitions. [2021-04-15 05:14:06,434 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 23024 transitions. Word has length 34 [2021-04-15 05:14:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:06,434 INFO L480 AbstractCegarLoop]: Abstraction has 7911 states and 23024 transitions. [2021-04-15 05:14:06,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 23024 transitions. [2021-04-15 05:14:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:06,444 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:06,444 INFO L551 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] [2021-04-15 05:14:06,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:06,649 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1774559878, now seen corresponding path program 49 times [2021-04-15 05:14:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:06,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198724567] [2021-04-15 05:14:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:14:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198724567] [2021-04-15 05:14:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168212339] [2021-04-15 05:14:06,752 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:14:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:06,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:07,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:07,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-04-15 05:14:07,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303409435] [2021-04-15 05:14:07,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:07,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:07,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:07,003 INFO L87 Difference]: Start difference. First operand 7911 states and 23024 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2021-04-15 05:14:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:07,185 INFO L93 Difference]: Finished difference Result 8695 states and 25141 transitions. [2021-04-15 05:14:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:07,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 34 [2021-04-15 05:14:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:07,197 INFO L225 Difference]: With dead ends: 8695 [2021-04-15 05:14:07,197 INFO L226 Difference]: Without dead ends: 8578 [2021-04-15 05:14:07,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-04-15 05:14:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 8323. [2021-04-15 05:14:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 2.918048546022591) internal successors, (24284), 8322 states have internal predecessors, (24284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 24284 transitions. [2021-04-15 05:14:07,317 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 24284 transitions. Word has length 34 [2021-04-15 05:14:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:07,317 INFO L480 AbstractCegarLoop]: Abstraction has 8323 states and 24284 transitions. [2021-04-15 05:14:07,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2021-04-15 05:14:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 24284 transitions. [2021-04-15 05:14:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:07,375 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:07,375 INFO L551 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] [2021-04-15 05:14:07,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-15 05:14:07,575 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1520972218, now seen corresponding path program 50 times [2021-04-15 05:14:07,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:07,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171166115] [2021-04-15 05:14:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:07,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171166115] [2021-04-15 05:14:07,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959067123] [2021-04-15 05:14:07,688 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:07,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:07,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:07,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:07,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:07,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:07,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:14:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664290703] [2021-04-15 05:14:07,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:14:07,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:14:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:07,921 INFO L87 Difference]: Start difference. First operand 8323 states and 24284 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:08,154 INFO L93 Difference]: Finished difference Result 8641 states and 24990 transitions. [2021-04-15 05:14:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:14:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:08,166 INFO L225 Difference]: With dead ends: 8641 [2021-04-15 05:14:08,166 INFO L226 Difference]: Without dead ends: 8565 [2021-04-15 05:14:08,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:14:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-04-15 05:14:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 8317. [2021-04-15 05:14:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 8316 states have (on average 2.9183501683501682) internal successors, (24269), 8316 states have internal predecessors, (24269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24269 transitions. [2021-04-15 05:14:08,286 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24269 transitions. Word has length 34 [2021-04-15 05:14:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:08,286 INFO L480 AbstractCegarLoop]: Abstraction has 8317 states and 24269 transitions. [2021-04-15 05:14:08,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24269 transitions. [2021-04-15 05:14:08,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:08,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:08,296 INFO L551 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] [2021-04-15 05:14:08,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:08,497 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash -339756294, now seen corresponding path program 51 times [2021-04-15 05:14:08,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:08,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994719594] [2021-04-15 05:14:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:08,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994719594] [2021-04-15 05:14:08,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665328278] [2021-04-15 05:14:08,637 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:08,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:14:08,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:08,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:08,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:08,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:08,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-04-15 05:14:08,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432143216] [2021-04-15 05:14:08,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:14:08,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:08,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:14:08,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:14:08,806 INFO L87 Difference]: Start difference. First operand 8317 states and 24269 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:08,989 INFO L93 Difference]: Finished difference Result 12332 states and 36170 transitions. [2021-04-15 05:14:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:14:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:09,008 INFO L225 Difference]: With dead ends: 12332 [2021-04-15 05:14:09,008 INFO L226 Difference]: Without dead ends: 12295 [2021-04-15 05:14:09,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-04-15 05:14:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 8325. [2021-04-15 05:14:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 2.917948101874099) internal successors, (24289), 8324 states have internal predecessors, (24289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 24289 transitions. [2021-04-15 05:14:09,186 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 24289 transitions. Word has length 34 [2021-04-15 05:14:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:09,186 INFO L480 AbstractCegarLoop]: Abstraction has 8325 states and 24289 transitions. [2021-04-15 05:14:09,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 24289 transitions. [2021-04-15 05:14:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:09,196 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:09,196 INFO L551 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] [2021-04-15 05:14:09,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:09,397 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2051845890, now seen corresponding path program 52 times [2021-04-15 05:14:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:09,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576204932] [2021-04-15 05:14:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:09,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576204932] [2021-04-15 05:14:09,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368769313] [2021-04-15 05:14:09,521 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:09,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:09,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:09,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-04-15 05:14:09,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776182597] [2021-04-15 05:14:09,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:09,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:09,714 INFO L87 Difference]: Start difference. First operand 8325 states and 24289 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:09,890 INFO L93 Difference]: Finished difference Result 12300 states and 36126 transitions. [2021-04-15 05:14:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:14:09,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:09,907 INFO L225 Difference]: With dead ends: 12300 [2021-04-15 05:14:09,907 INFO L226 Difference]: Without dead ends: 12263 [2021-04-15 05:14:09,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2021-04-15 05:14:10,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 8347. [2021-04-15 05:14:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8347 states, 8346 states have (on average 2.9180445722501798) internal successors, (24354), 8346 states have internal predecessors, (24354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 24354 transitions. [2021-04-15 05:14:10,044 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 24354 transitions. Word has length 34 [2021-04-15 05:14:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:10,044 INFO L480 AbstractCegarLoop]: Abstraction has 8347 states and 24354 transitions. [2021-04-15 05:14:10,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 24354 transitions. [2021-04-15 05:14:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:10,054 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:10,054 INFO L551 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] [2021-04-15 05:14:10,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:10,256 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1363343686, now seen corresponding path program 53 times [2021-04-15 05:14:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:10,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205283458] [2021-04-15 05:14:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:10,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205283458] [2021-04-15 05:14:10,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546976543] [2021-04-15 05:14:10,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:14:10,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:14:10,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:10,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:14:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:10,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:10,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:14:10,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333703030] [2021-04-15 05:14:10,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:14:10,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:10,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:14:10,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:14:10,594 INFO L87 Difference]: Start difference. First operand 8347 states and 24354 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:10,925 INFO L93 Difference]: Finished difference Result 12845 states and 37674 transitions. [2021-04-15 05:14:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:10,945 INFO L225 Difference]: With dead ends: 12845 [2021-04-15 05:14:10,945 INFO L226 Difference]: Without dead ends: 12771 [2021-04-15 05:14:10,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-04-15 05:14:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 8781. [2021-04-15 05:14:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 2.9197038724373576) internal successors, (25635), 8780 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 25635 transitions. [2021-04-15 05:14:11,118 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 25635 transitions. Word has length 34 [2021-04-15 05:14:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:11,118 INFO L480 AbstractCegarLoop]: Abstraction has 8781 states and 25635 transitions. [2021-04-15 05:14:11,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 25635 transitions. [2021-04-15 05:14:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:11,128 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:11,128 INFO L551 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] [2021-04-15 05:14:11,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:11,329 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1176620350, now seen corresponding path program 54 times [2021-04-15 05:14:11,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:11,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296325298] [2021-04-15 05:14:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:11,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296325298] [2021-04-15 05:14:11,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409318086] [2021-04-15 05:14:11,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:11,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:14:11,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:11,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:11,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-04-15 05:14:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817683728] [2021-04-15 05:14:11,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:11,646 INFO L87 Difference]: Start difference. First operand 8781 states and 25635 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:11,968 INFO L93 Difference]: Finished difference Result 13891 states and 40747 transitions. [2021-04-15 05:14:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:14:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:11,993 INFO L225 Difference]: With dead ends: 13891 [2021-04-15 05:14:11,993 INFO L226 Difference]: Without dead ends: 13801 [2021-04-15 05:14:11,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:14:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13801 states. [2021-04-15 05:14:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13801 to 9593. [2021-04-15 05:14:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9593 states, 9592 states have (on average 2.9265012510425357) internal successors, (28071), 9592 states have internal predecessors, (28071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9593 states to 9593 states and 28071 transitions. [2021-04-15 05:14:12,154 INFO L78 Accepts]: Start accepts. Automaton has 9593 states and 28071 transitions. Word has length 34 [2021-04-15 05:14:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:12,154 INFO L480 AbstractCegarLoop]: Abstraction has 9593 states and 28071 transitions. [2021-04-15 05:14:12,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9593 states and 28071 transitions. [2021-04-15 05:14:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:12,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:12,167 INFO L551 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] [2021-04-15 05:14:12,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-04-15 05:14:12,379 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1057537338, now seen corresponding path program 55 times [2021-04-15 05:14:12,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:12,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543762425] [2021-04-15 05:14:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:12,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543762425] [2021-04-15 05:14:12,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34391210] [2021-04-15 05:14:12,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:12,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:12,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:12,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-04-15 05:14:12,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954206214] [2021-04-15 05:14:12,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:12,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:12,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:12,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:12,759 INFO L87 Difference]: Start difference. First operand 9593 states and 28071 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:13,052 INFO L93 Difference]: Finished difference Result 13916 states and 40787 transitions. [2021-04-15 05:14:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:14:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:13,075 INFO L225 Difference]: With dead ends: 13916 [2021-04-15 05:14:13,075 INFO L226 Difference]: Without dead ends: 13814 [2021-04-15 05:14:13,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:14:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13814 states. [2021-04-15 05:14:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13814 to 9193. [2021-04-15 05:14:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 2.922432550043516) internal successors, (26863), 9192 states have internal predecessors, (26863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 26863 transitions. [2021-04-15 05:14:13,231 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 26863 transitions. Word has length 34 [2021-04-15 05:14:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:13,232 INFO L480 AbstractCegarLoop]: Abstraction has 9193 states and 26863 transitions. [2021-04-15 05:14:13,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 26863 transitions. [2021-04-15 05:14:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:13,243 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:13,243 INFO L551 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] [2021-04-15 05:14:13,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:13,445 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:13,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1063331952, now seen corresponding path program 56 times [2021-04-15 05:14:13,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:13,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861010161] [2021-04-15 05:14:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:13,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861010161] [2021-04-15 05:14:13,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102677806] [2021-04-15 05:14:13,576 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:13,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:13,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:13,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:13,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:14:13,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814555021] [2021-04-15 05:14:13,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:13,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:13,787 INFO L87 Difference]: Start difference. First operand 9193 states and 26863 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:13,997 INFO L93 Difference]: Finished difference Result 10245 states and 29682 transitions. [2021-04-15 05:14:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:13,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:14,012 INFO L225 Difference]: With dead ends: 10245 [2021-04-15 05:14:14,012 INFO L226 Difference]: Without dead ends: 10171 [2021-04-15 05:14:14,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10171 states. [2021-04-15 05:14:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10171 to 9511. [2021-04-15 05:14:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9511 states, 9510 states have (on average 2.9251314405888538) internal successors, (27818), 9510 states have internal predecessors, (27818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9511 states to 9511 states and 27818 transitions. [2021-04-15 05:14:14,151 INFO L78 Accepts]: Start accepts. Automaton has 9511 states and 27818 transitions. Word has length 34 [2021-04-15 05:14:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:14,151 INFO L480 AbstractCegarLoop]: Abstraction has 9511 states and 27818 transitions. [2021-04-15 05:14:14,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 9511 states and 27818 transitions. [2021-04-15 05:14:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:14,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:14,163 INFO L551 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] [2021-04-15 05:14:14,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:14,364 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1983656864, now seen corresponding path program 57 times [2021-04-15 05:14:14,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:14,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449622689] [2021-04-15 05:14:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449622689] [2021-04-15 05:14:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142387413] [2021-04-15 05:14:14,473 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:14,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:14:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:14,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:14,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-04-15 05:14:14,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843067655] [2021-04-15 05:14:14,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:14,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:14,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:14,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:14,766 INFO L87 Difference]: Start difference. First operand 9511 states and 27818 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:15,031 INFO L93 Difference]: Finished difference Result 10671 states and 30957 transitions. [2021-04-15 05:14:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:15,052 INFO L225 Difference]: With dead ends: 10671 [2021-04-15 05:14:15,053 INFO L226 Difference]: Without dead ends: 10597 [2021-04-15 05:14:15,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2021-04-15 05:14:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 9447. [2021-04-15 05:14:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 2.9271649375396995) internal successors, (27650), 9446 states have internal predecessors, (27650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 27650 transitions. [2021-04-15 05:14:15,192 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 27650 transitions. Word has length 34 [2021-04-15 05:14:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:15,192 INFO L480 AbstractCegarLoop]: Abstraction has 9447 states and 27650 transitions. [2021-04-15 05:14:15,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 27650 transitions. [2021-04-15 05:14:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:15,205 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:15,205 INFO L551 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] [2021-04-15 05:14:15,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:15,407 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1691006202, now seen corresponding path program 58 times [2021-04-15 05:14:15,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:15,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533201694] [2021-04-15 05:14:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:15,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533201694] [2021-04-15 05:14:15,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230606232] [2021-04-15 05:14:15,505 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:15,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:15,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:15,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:14:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:15,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:15,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:14:15,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550761895] [2021-04-15 05:14:15,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:14:15,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:14:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:14:15,742 INFO L87 Difference]: Start difference. First operand 9447 states and 27650 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:16,001 INFO L93 Difference]: Finished difference Result 11355 states and 33052 transitions. [2021-04-15 05:14:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:14:16,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:16,018 INFO L225 Difference]: With dead ends: 11355 [2021-04-15 05:14:16,018 INFO L226 Difference]: Without dead ends: 11265 [2021-04-15 05:14:16,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-04-15 05:14:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10245. [2021-04-15 05:14:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10244 states have (on average 2.9350839515814133) internal successors, (30067), 10244 states have internal predecessors, (30067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 30067 transitions. [2021-04-15 05:14:16,173 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 30067 transitions. Word has length 34 [2021-04-15 05:14:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:16,173 INFO L480 AbstractCegarLoop]: Abstraction has 10245 states and 30067 transitions. [2021-04-15 05:14:16,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 30067 transitions. [2021-04-15 05:14:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:16,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:16,186 INFO L551 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] [2021-04-15 05:14:16,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-04-15 05:14:16,387 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1810089214, now seen corresponding path program 59 times [2021-04-15 05:14:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:16,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216166920] [2021-04-15 05:14:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:16,564 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2021-04-15 05:14:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:14:16,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216166920] [2021-04-15 05:14:16,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057007938] [2021-04-15 05:14:16,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:16,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:14:16,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:16,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:16,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:16,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-04-15 05:14:16,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436220889] [2021-04-15 05:14:16,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:16,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:16,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:16,837 INFO L87 Difference]: Start difference. First operand 10245 states and 30067 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:17,089 INFO L93 Difference]: Finished difference Result 11347 states and 33022 transitions. [2021-04-15 05:14:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:14:17,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:17,105 INFO L225 Difference]: With dead ends: 11347 [2021-04-15 05:14:17,106 INFO L226 Difference]: Without dead ends: 11231 [2021-04-15 05:14:17,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 351.9ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:14:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11231 states. [2021-04-15 05:14:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11231 to 10199. [2021-04-15 05:14:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10199 states, 10198 states have (on average 2.933516375759953) internal successors, (29916), 10198 states have internal predecessors, (29916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10199 states to 10199 states and 29916 transitions. [2021-04-15 05:14:17,256 INFO L78 Accepts]: Start accepts. Automaton has 10199 states and 29916 transitions. Word has length 34 [2021-04-15 05:14:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:17,257 INFO L480 AbstractCegarLoop]: Abstraction has 10199 states and 29916 transitions. [2021-04-15 05:14:17,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10199 states and 29916 transitions. [2021-04-15 05:14:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:17,269 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:17,269 INFO L551 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] [2021-04-15 05:14:17,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:17,470 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1665801632, now seen corresponding path program 60 times [2021-04-15 05:14:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:17,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660433560] [2021-04-15 05:14:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:17,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660433560] [2021-04-15 05:14:17,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321661663] [2021-04-15 05:14:17,570 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:17,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:14:17,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:17,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:17,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:17,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:14:17,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390868351] [2021-04-15 05:14:17,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:17,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:17,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:17,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:17,817 INFO L87 Difference]: Start difference. First operand 10199 states and 29916 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:18,162 INFO L93 Difference]: Finished difference Result 11049 states and 32066 transitions. [2021-04-15 05:14:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:14:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:18,178 INFO L225 Difference]: With dead ends: 11049 [2021-04-15 05:14:18,178 INFO L226 Difference]: Without dead ends: 10932 [2021-04-15 05:14:18,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:14:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10932 states. [2021-04-15 05:14:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10932 to 9709. [2021-04-15 05:14:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9709 states, 9708 states have (on average 2.930057684384013) internal successors, (28445), 9708 states have internal predecessors, (28445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9709 states to 9709 states and 28445 transitions. [2021-04-15 05:14:18,396 INFO L78 Accepts]: Start accepts. Automaton has 9709 states and 28445 transitions. Word has length 34 [2021-04-15 05:14:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:18,396 INFO L480 AbstractCegarLoop]: Abstraction has 9709 states and 28445 transitions. [2021-04-15 05:14:18,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9709 states and 28445 transitions. [2021-04-15 05:14:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:18,408 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:18,409 INFO L551 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] [2021-04-15 05:14:18,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 05:14:18,609 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:18,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1957855712, now seen corresponding path program 61 times [2021-04-15 05:14:18,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:18,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78577492] [2021-04-15 05:14:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:18,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78577492] [2021-04-15 05:14:18,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344156095] [2021-04-15 05:14:18,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:14:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:19,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:19,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:14:19,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591440042] [2021-04-15 05:14:19,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:14:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:14:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:19,029 INFO L87 Difference]: Start difference. First operand 9709 states and 28445 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:19,320 INFO L93 Difference]: Finished difference Result 11021 states and 32116 transitions. [2021-04-15 05:14:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:14:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:19,335 INFO L225 Difference]: With dead ends: 11021 [2021-04-15 05:14:19,335 INFO L226 Difference]: Without dead ends: 10927 [2021-04-15 05:14:19,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:14:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10927 states. [2021-04-15 05:14:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10927 to 9881. [2021-04-15 05:14:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9881 states, 9880 states have (on average 2.9322874493927125) internal successors, (28971), 9880 states have internal predecessors, (28971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9881 states to 9881 states and 28971 transitions. [2021-04-15 05:14:19,496 INFO L78 Accepts]: Start accepts. Automaton has 9881 states and 28971 transitions. Word has length 34 [2021-04-15 05:14:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:19,496 INFO L480 AbstractCegarLoop]: Abstraction has 9881 states and 28971 transitions. [2021-04-15 05:14:19,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 9881 states and 28971 transitions. [2021-04-15 05:14:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:19,507 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:19,507 INFO L551 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] [2021-04-15 05:14:19,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 05:14:19,708 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:19,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1517139066, now seen corresponding path program 62 times [2021-04-15 05:14:19,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:19,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120223767] [2021-04-15 05:14:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:19,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120223767] [2021-04-15 05:14:19,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59989271] [2021-04-15 05:14:19,807 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:19,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:19,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:19,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:19,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:20,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:20,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-04-15 05:14:20,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503943228] [2021-04-15 05:14:20,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:20,023 INFO L87 Difference]: Start difference. First operand 9881 states and 28971 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:20,269 INFO L93 Difference]: Finished difference Result 10687 states and 31153 transitions. [2021-04-15 05:14:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:20,285 INFO L225 Difference]: With dead ends: 10687 [2021-04-15 05:14:20,285 INFO L226 Difference]: Without dead ends: 10579 [2021-04-15 05:14:20,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:14:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10579 states. [2021-04-15 05:14:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10579 to 8897. [2021-04-15 05:14:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8897 states, 8896 states have (on average 2.9333408273381294) internal successors, (26095), 8896 states have internal predecessors, (26095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8897 states to 8897 states and 26095 transitions. [2021-04-15 05:14:20,406 INFO L78 Accepts]: Start accepts. Automaton has 8897 states and 26095 transitions. Word has length 34 [2021-04-15 05:14:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:20,406 INFO L480 AbstractCegarLoop]: Abstraction has 8897 states and 26095 transitions. [2021-04-15 05:14:20,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8897 states and 26095 transitions. [2021-04-15 05:14:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:20,416 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:20,416 INFO L551 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] [2021-04-15 05:14:20,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-04-15 05:14:20,617 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1039269088, now seen corresponding path program 63 times [2021-04-15 05:14:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:20,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505197056] [2021-04-15 05:14:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:20,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505197056] [2021-04-15 05:14:20,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383740608] [2021-04-15 05:14:20,694 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:20,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:14:20,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:20,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:20,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:20,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-04-15 05:14:20,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122208683] [2021-04-15 05:14:20,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:20,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:20,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:20,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:20,905 INFO L87 Difference]: Start difference. First operand 8897 states and 26095 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:21,177 INFO L93 Difference]: Finished difference Result 10521 states and 30797 transitions. [2021-04-15 05:14:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:14:21,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:21,253 INFO L225 Difference]: With dead ends: 10521 [2021-04-15 05:14:21,253 INFO L226 Difference]: Without dead ends: 10439 [2021-04-15 05:14:21,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10439 states. [2021-04-15 05:14:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10439 to 10093. [2021-04-15 05:14:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10093 states, 10092 states have (on average 2.9440150614347997) internal successors, (29711), 10092 states have internal predecessors, (29711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10093 states to 10093 states and 29711 transitions. [2021-04-15 05:14:21,376 INFO L78 Accepts]: Start accepts. Automaton has 10093 states and 29711 transitions. Word has length 34 [2021-04-15 05:14:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:21,376 INFO L480 AbstractCegarLoop]: Abstraction has 10093 states and 29711 transitions. [2021-04-15 05:14:21,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10093 states and 29711 transitions. [2021-04-15 05:14:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:21,387 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:21,387 INFO L551 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] [2021-04-15 05:14:21,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:21,589 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1158352100, now seen corresponding path program 64 times [2021-04-15 05:14:21,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:21,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812238359] [2021-04-15 05:14:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:14:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812238359] [2021-04-15 05:14:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330495128] [2021-04-15 05:14:21,671 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:21,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:21,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:21,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:21,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-04-15 05:14:21,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710142580] [2021-04-15 05:14:21,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:21,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:21,900 INFO L87 Difference]: Start difference. First operand 10093 states and 29711 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:22,130 INFO L93 Difference]: Finished difference Result 10518 states and 30785 transitions. [2021-04-15 05:14:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:14:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:22,152 INFO L225 Difference]: With dead ends: 10518 [2021-04-15 05:14:22,152 INFO L226 Difference]: Without dead ends: 10406 [2021-04-15 05:14:22,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2021-04-15 05:14:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 9635. [2021-04-15 05:14:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9635 states, 9634 states have (on average 2.9383433672410213) internal successors, (28308), 9634 states have internal predecessors, (28308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9635 states to 9635 states and 28308 transitions. [2021-04-15 05:14:22,286 INFO L78 Accepts]: Start accepts. Automaton has 9635 states and 28308 transitions. Word has length 34 [2021-04-15 05:14:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:22,287 INFO L480 AbstractCegarLoop]: Abstraction has 9635 states and 28308 transitions. [2021-04-15 05:14:22,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 9635 states and 28308 transitions. [2021-04-15 05:14:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:22,298 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:22,298 INFO L551 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] [2021-04-15 05:14:22,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:22,499 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1014064518, now seen corresponding path program 65 times [2021-04-15 05:14:22,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:22,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946561093] [2021-04-15 05:14:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:14:22,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946561093] [2021-04-15 05:14:22,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955281921] [2021-04-15 05:14:22,606 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:22,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:14:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:14:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:22,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:22,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-04-15 05:14:22,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744037996] [2021-04-15 05:14:22,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:22,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:22,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:22,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:22,831 INFO L87 Difference]: Start difference. First operand 9635 states and 28308 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-04-15 05:14:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:23,103 INFO L93 Difference]: Finished difference Result 10415 states and 30415 transitions. [2021-04-15 05:14:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:14:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 34 [2021-04-15 05:14:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:23,120 INFO L225 Difference]: With dead ends: 10415 [2021-04-15 05:14:23,121 INFO L226 Difference]: Without dead ends: 10298 [2021-04-15 05:14:23,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10298 states. [2021-04-15 05:14:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10298 to 10047. [2021-04-15 05:14:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 2.943260999402747) internal successors, (29568), 10046 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 29568 transitions. [2021-04-15 05:14:23,281 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 29568 transitions. Word has length 34 [2021-04-15 05:14:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:23,281 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 29568 transitions. [2021-04-15 05:14:23,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-04-15 05:14:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 29568 transitions. [2021-04-15 05:14:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:14:23,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:23,295 INFO L551 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] [2021-04-15 05:14:23,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:23,496 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash -14629318, now seen corresponding path program 66 times [2021-04-15 05:14:23,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:23,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868704884] [2021-04-15 05:14:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:23,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868704884] [2021-04-15 05:14:23,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146682634] [2021-04-15 05:14:23,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:23,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:14:23,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:23,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:23,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:14:23,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445657322] [2021-04-15 05:14:23,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:14:23,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:14:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:23,916 INFO L87 Difference]: Start difference. First operand 10047 states and 29568 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:24,145 INFO L93 Difference]: Finished difference Result 10361 states and 30264 transitions. [2021-04-15 05:14:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:14:24,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:14:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:24,163 INFO L225 Difference]: With dead ends: 10361 [2021-04-15 05:14:24,163 INFO L226 Difference]: Without dead ends: 10285 [2021-04-15 05:14:24,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:14:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10285 states. [2021-04-15 05:14:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10285 to 8741. [2021-04-15 05:14:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 8740 states have (on average 2.940846681922197) internal successors, (25703), 8740 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 25703 transitions. [2021-04-15 05:14:24,281 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 25703 transitions. Word has length 34 [2021-04-15 05:14:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:24,281 INFO L480 AbstractCegarLoop]: Abstraction has 8741 states and 25703 transitions. [2021-04-15 05:14:24,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 25703 transitions. [2021-04-15 05:14:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:24,291 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:24,291 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:24,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 05:14:24,492 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash -826580692, now seen corresponding path program 67 times [2021-04-15 05:14:24,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:24,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988832446] [2021-04-15 05:14:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:24,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988832446] [2021-04-15 05:14:24,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947737297] [2021-04-15 05:14:24,555 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:24,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:24,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:24,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:14:24,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577822727] [2021-04-15 05:14:24,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:14:24,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:24,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:14:24,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:14:24,676 INFO L87 Difference]: Start difference. First operand 8741 states and 25703 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:24,857 INFO L93 Difference]: Finished difference Result 12506 states and 36770 transitions. [2021-04-15 05:14:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:14:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-04-15 05:14:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:24,877 INFO L225 Difference]: With dead ends: 12506 [2021-04-15 05:14:24,877 INFO L226 Difference]: Without dead ends: 12506 [2021-04-15 05:14:24,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-04-15 05:14:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 9087. [2021-04-15 05:14:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9087 states, 9086 states have (on average 2.9369359454105215) internal successors, (26685), 9086 states have internal predecessors, (26685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9087 states to 9087 states and 26685 transitions. [2021-04-15 05:14:25,027 INFO L78 Accepts]: Start accepts. Automaton has 9087 states and 26685 transitions. Word has length 37 [2021-04-15 05:14:25,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:25,027 INFO L480 AbstractCegarLoop]: Abstraction has 9087 states and 26685 transitions. [2021-04-15 05:14:25,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9087 states and 26685 transitions. [2021-04-15 05:14:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:25,038 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:25,038 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:25,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 05:14:25,240 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash -179080118, now seen corresponding path program 68 times [2021-04-15 05:14:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:25,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466414783] [2021-04-15 05:14:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:25,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466414783] [2021-04-15 05:14:25,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140134858] [2021-04-15 05:14:25,281 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:25,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:25,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:25,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:25,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:25,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:25,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:14:25,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980524765] [2021-04-15 05:14:25,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:14:25,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:14:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:14:25,389 INFO L87 Difference]: Start difference. First operand 9087 states and 26685 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:25,546 INFO L93 Difference]: Finished difference Result 14863 states and 43287 transitions. [2021-04-15 05:14:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:14:25,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-04-15 05:14:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:25,571 INFO L225 Difference]: With dead ends: 14863 [2021-04-15 05:14:25,571 INFO L226 Difference]: Without dead ends: 14797 [2021-04-15 05:14:25,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14797 states. [2021-04-15 05:14:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14797 to 9087. [2021-04-15 05:14:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9087 states, 9086 states have (on average 2.935945410521682) internal successors, (26676), 9086 states have internal predecessors, (26676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9087 states to 9087 states and 26676 transitions. [2021-04-15 05:14:25,750 INFO L78 Accepts]: Start accepts. Automaton has 9087 states and 26676 transitions. Word has length 37 [2021-04-15 05:14:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:25,751 INFO L480 AbstractCegarLoop]: Abstraction has 9087 states and 26676 transitions. [2021-04-15 05:14:25,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9087 states and 26676 transitions. [2021-04-15 05:14:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:25,763 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:25,763 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:25,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-04-15 05:14:25,964 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:25,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1381181770, now seen corresponding path program 69 times [2021-04-15 05:14:25,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:25,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377908797] [2021-04-15 05:14:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:25,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377908797] [2021-04-15 05:14:25,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986767078] [2021-04-15 05:14:25,998 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:26,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:14:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:26,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:26,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:26,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852486240] [2021-04-15 05:14:26,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:26,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:26,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:26,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:26,125 INFO L87 Difference]: Start difference. First operand 9087 states and 26676 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:26,707 INFO L93 Difference]: Finished difference Result 18726 states and 53866 transitions. [2021-04-15 05:14:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:14:26,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:26,737 INFO L225 Difference]: With dead ends: 18726 [2021-04-15 05:14:26,737 INFO L226 Difference]: Without dead ends: 18720 [2021-04-15 05:14:26,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:14:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18720 states. [2021-04-15 05:14:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18720 to 12042. [2021-04-15 05:14:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12042 states, 12041 states have (on average 2.9554854247986047) internal successors, (35587), 12041 states have internal predecessors, (35587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12042 states to 12042 states and 35587 transitions. [2021-04-15 05:14:26,988 INFO L78 Accepts]: Start accepts. Automaton has 12042 states and 35587 transitions. Word has length 37 [2021-04-15 05:14:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:26,989 INFO L480 AbstractCegarLoop]: Abstraction has 12042 states and 35587 transitions. [2021-04-15 05:14:26,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12042 states and 35587 transitions. [2021-04-15 05:14:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:27,004 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:27,004 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:27,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:27,213 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:27,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:27,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1170484724, now seen corresponding path program 70 times [2021-04-15 05:14:27,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:27,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570458697] [2021-04-15 05:14:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:27,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570458697] [2021-04-15 05:14:27,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980492860] [2021-04-15 05:14:27,250 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:27,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:27,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:27,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:27,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:27,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:27,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247161823] [2021-04-15 05:14:27,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:27,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:27,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:27,367 INFO L87 Difference]: Start difference. First operand 12042 states and 35587 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:27,737 INFO L93 Difference]: Finished difference Result 16231 states and 47060 transitions. [2021-04-15 05:14:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:14:27,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-04-15 05:14:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:27,760 INFO L225 Difference]: With dead ends: 16231 [2021-04-15 05:14:27,760 INFO L226 Difference]: Without dead ends: 16219 [2021-04-15 05:14:27,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:14:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-04-15 05:14:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 13102. [2021-04-15 05:14:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13102 states, 13101 states have (on average 2.9656514769864897) internal successors, (38853), 13101 states have internal predecessors, (38853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13102 states to 13102 states and 38853 transitions. [2021-04-15 05:14:27,983 INFO L78 Accepts]: Start accepts. Automaton has 13102 states and 38853 transitions. Word has length 37 [2021-04-15 05:14:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:27,983 INFO L480 AbstractCegarLoop]: Abstraction has 13102 states and 38853 transitions. [2021-04-15 05:14:27,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 13102 states and 38853 transitions. [2021-04-15 05:14:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:28,002 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:28,002 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:28,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-04-15 05:14:28,202 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:28,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1899236542, now seen corresponding path program 71 times [2021-04-15 05:14:28,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:28,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027313865] [2021-04-15 05:14:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:28,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027313865] [2021-04-15 05:14:28,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53019696] [2021-04-15 05:14:28,237 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:28,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:14:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:28,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:28,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:28,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82656582] [2021-04-15 05:14:28,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:28,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:28,339 INFO L87 Difference]: Start difference. First operand 13102 states and 38853 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:28,917 INFO L93 Difference]: Finished difference Result 16682 states and 48163 transitions. [2021-04-15 05:14:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:14:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-04-15 05:14:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:28,944 INFO L225 Difference]: With dead ends: 16682 [2021-04-15 05:14:28,944 INFO L226 Difference]: Without dead ends: 16682 [2021-04-15 05:14:28,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:14:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16682 states. [2021-04-15 05:14:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16682 to 11650. [2021-04-15 05:14:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.9569061722036225) internal successors, (34445), 11649 states have internal predecessors, (34445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 34445 transitions. [2021-04-15 05:14:29,212 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 34445 transitions. Word has length 37 [2021-04-15 05:14:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:29,212 INFO L480 AbstractCegarLoop]: Abstraction has 11650 states and 34445 transitions. [2021-04-15 05:14:29,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 34445 transitions. [2021-04-15 05:14:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:29,226 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:29,226 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:29,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:29,427 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:29,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1522265388, now seen corresponding path program 72 times [2021-04-15 05:14:29,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:29,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733469600] [2021-04-15 05:14:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733469600] [2021-04-15 05:14:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144552498] [2021-04-15 05:14:29,476 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:29,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:14:29,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:29,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:29,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:29,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:29,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323612719] [2021-04-15 05:14:29,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:29,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:29,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:29,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:29,616 INFO L87 Difference]: Start difference. First operand 11650 states and 34445 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:30,025 INFO L93 Difference]: Finished difference Result 17986 states and 51918 transitions. [2021-04-15 05:14:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:14:30,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-04-15 05:14:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:30,058 INFO L225 Difference]: With dead ends: 17986 [2021-04-15 05:14:30,058 INFO L226 Difference]: Without dead ends: 17972 [2021-04-15 05:14:30,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:14:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17972 states. [2021-04-15 05:14:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17972 to 10490. [2021-04-15 05:14:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10490 states, 10489 states have (on average 2.9443226237010203) internal successors, (30883), 10489 states have internal predecessors, (30883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 30883 transitions. [2021-04-15 05:14:30,286 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 30883 transitions. Word has length 37 [2021-04-15 05:14:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:30,286 INFO L480 AbstractCegarLoop]: Abstraction has 10490 states and 30883 transitions. [2021-04-15 05:14:30,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 30883 transitions. [2021-04-15 05:14:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:30,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:30,300 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:30,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:30,501 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:30,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1606664162, now seen corresponding path program 73 times [2021-04-15 05:14:30,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:30,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494195245] [2021-04-15 05:14:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:30,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494195245] [2021-04-15 05:14:30,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994649153] [2021-04-15 05:14:30,535 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:30,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:30,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:30,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125183178] [2021-04-15 05:14:30,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:30,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:30,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:30,637 INFO L87 Difference]: Start difference. First operand 10490 states and 30883 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:30,980 INFO L93 Difference]: Finished difference Result 17889 states and 51707 transitions. [2021-04-15 05:14:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:14:30,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-04-15 05:14:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:31,009 INFO L225 Difference]: With dead ends: 17889 [2021-04-15 05:14:31,009 INFO L226 Difference]: Without dead ends: 17833 [2021-04-15 05:14:31,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:14:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17833 states. [2021-04-15 05:14:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17833 to 11034. [2021-04-15 05:14:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11034 states, 11033 states have (on average 2.94162965648509) internal successors, (32455), 11033 states have internal predecessors, (32455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11034 states to 11034 states and 32455 transitions. [2021-04-15 05:14:31,279 INFO L78 Accepts]: Start accepts. Automaton has 11034 states and 32455 transitions. Word has length 37 [2021-04-15 05:14:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:31,280 INFO L480 AbstractCegarLoop]: Abstraction has 11034 states and 32455 transitions. [2021-04-15 05:14:31,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 11034 states and 32455 transitions. [2021-04-15 05:14:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:31,292 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:31,293 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:31,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:31,493 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1048265624, now seen corresponding path program 74 times [2021-04-15 05:14:31,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:31,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301563194] [2021-04-15 05:14:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:31,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301563194] [2021-04-15 05:14:31,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309861632] [2021-04-15 05:14:31,532 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:14:31,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:31,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:31,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:31,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:31,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:31,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:31,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207128442] [2021-04-15 05:14:31,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:31,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:31,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:31,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:31,679 INFO L87 Difference]: Start difference. First operand 11034 states and 32455 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:31,979 INFO L93 Difference]: Finished difference Result 16386 states and 47537 transitions. [2021-04-15 05:14:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:14:31,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-04-15 05:14:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:32,012 INFO L225 Difference]: With dead ends: 16386 [2021-04-15 05:14:32,012 INFO L226 Difference]: Without dead ends: 16337 [2021-04-15 05:14:32,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:14:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16337 states. [2021-04-15 05:14:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16337 to 11048. [2021-04-15 05:14:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11048 states, 11047 states have (on average 2.9385353489635193) internal successors, (32462), 11047 states have internal predecessors, (32462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11048 states to 11048 states and 32462 transitions. [2021-04-15 05:14:32,259 INFO L78 Accepts]: Start accepts. Automaton has 11048 states and 32462 transitions. Word has length 37 [2021-04-15 05:14:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:32,259 INFO L480 AbstractCegarLoop]: Abstraction has 11048 states and 32462 transitions. [2021-04-15 05:14:32,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 11048 states and 32462 transitions. [2021-04-15 05:14:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:32,272 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:32,272 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:32,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:32,473 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash -272513428, now seen corresponding path program 75 times [2021-04-15 05:14:32,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:32,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232256927] [2021-04-15 05:14:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:32,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232256927] [2021-04-15 05:14:32,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775557456] [2021-04-15 05:14:32,510 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:14:32,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:14:32,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:32,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:32,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:14:32,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215456675] [2021-04-15 05:14:32,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:14:32,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:14:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:14:32,638 INFO L87 Difference]: Start difference. First operand 11048 states and 32462 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2021-04-15 05:14:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:33,059 INFO L93 Difference]: Finished difference Result 16071 states and 46102 transitions. [2021-04-15 05:14:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:14:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 37 [2021-04-15 05:14:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:33,089 INFO L225 Difference]: With dead ends: 16071 [2021-04-15 05:14:33,089 INFO L226 Difference]: Without dead ends: 16011 [2021-04-15 05:14:33,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:14:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16011 states. [2021-04-15 05:14:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16011 to 11326. [2021-04-15 05:14:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11326 states, 11325 states have (on average 2.928653421633554) internal successors, (33167), 11325 states have internal predecessors, (33167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11326 states to 11326 states and 33167 transitions. [2021-04-15 05:14:33,308 INFO L78 Accepts]: Start accepts. Automaton has 11326 states and 33167 transitions. Word has length 37 [2021-04-15 05:14:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:33,308 INFO L480 AbstractCegarLoop]: Abstraction has 11326 states and 33167 transitions. [2021-04-15 05:14:33,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2021-04-15 05:14:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11326 states and 33167 transitions. [2021-04-15 05:14:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:33,322 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:33,322 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:33,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:33,523 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash 144146212, now seen corresponding path program 76 times [2021-04-15 05:14:33,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:33,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613364434] [2021-04-15 05:14:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:33,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613364434] [2021-04-15 05:14:33,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244258758] [2021-04-15 05:14:33,551 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:33,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:33,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:33,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:33,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 05:14:33,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865590920] [2021-04-15 05:14:33,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:33,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:33,665 INFO L87 Difference]: Start difference. First operand 11326 states and 33167 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-04-15 05:14:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:34,138 INFO L93 Difference]: Finished difference Result 16740 states and 47681 transitions. [2021-04-15 05:14:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:14:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-04-15 05:14:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:34,167 INFO L225 Difference]: With dead ends: 16740 [2021-04-15 05:14:34,167 INFO L226 Difference]: Without dead ends: 16733 [2021-04-15 05:14:34,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:14:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16733 states. [2021-04-15 05:14:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16733 to 11874. [2021-04-15 05:14:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11874 states, 11873 states have (on average 2.926219152699402) internal successors, (34743), 11873 states have internal predecessors, (34743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11874 states to 11874 states and 34743 transitions. [2021-04-15 05:14:34,406 INFO L78 Accepts]: Start accepts. Automaton has 11874 states and 34743 transitions. Word has length 37 [2021-04-15 05:14:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:34,406 INFO L480 AbstractCegarLoop]: Abstraction has 11874 states and 34743 transitions. [2021-04-15 05:14:34,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-04-15 05:14:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 11874 states and 34743 transitions. [2021-04-15 05:14:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:34,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:34,419 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:34,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 05:14:34,620 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash -198586448, now seen corresponding path program 77 times [2021-04-15 05:14:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:34,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930241667] [2021-04-15 05:14:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:34,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930241667] [2021-04-15 05:14:34,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4322213] [2021-04-15 05:14:34,660 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:34,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:14:34,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:34,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:34,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:34,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:14:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218480914] [2021-04-15 05:14:34,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:14:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:14:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:14:34,783 INFO L87 Difference]: Start difference. First operand 11874 states and 34743 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2021-04-15 05:14:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:35,229 INFO L93 Difference]: Finished difference Result 17514 states and 50064 transitions. [2021-04-15 05:14:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:14:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 37 [2021-04-15 05:14:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:35,255 INFO L225 Difference]: With dead ends: 17514 [2021-04-15 05:14:35,255 INFO L226 Difference]: Without dead ends: 17400 [2021-04-15 05:14:35,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:14:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2021-04-15 05:14:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 13318. [2021-04-15 05:14:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13318 states, 13317 states have (on average 2.9225050687091687) internal successors, (38919), 13317 states have internal predecessors, (38919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13318 states to 13318 states and 38919 transitions. [2021-04-15 05:14:35,513 INFO L78 Accepts]: Start accepts. Automaton has 13318 states and 38919 transitions. Word has length 37 [2021-04-15 05:14:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:35,513 INFO L480 AbstractCegarLoop]: Abstraction has 13318 states and 38919 transitions. [2021-04-15 05:14:35,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2021-04-15 05:14:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 13318 states and 38919 transitions. [2021-04-15 05:14:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:35,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:35,531 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:35,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 05:14:35,732 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash 52875454, now seen corresponding path program 78 times [2021-04-15 05:14:35,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:35,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749631731] [2021-04-15 05:14:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:35,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749631731] [2021-04-15 05:14:35,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943579049] [2021-04-15 05:14:35,768 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:35,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:14:35,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:35,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:35,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:35,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:35,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-04-15 05:14:35,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547984106] [2021-04-15 05:14:35,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:35,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:35,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:35,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:35,895 INFO L87 Difference]: Start difference. First operand 13318 states and 38919 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:36,364 INFO L93 Difference]: Finished difference Result 21245 states and 60807 transitions. [2021-04-15 05:14:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:14:36,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:36,400 INFO L225 Difference]: With dead ends: 21245 [2021-04-15 05:14:36,400 INFO L226 Difference]: Without dead ends: 21238 [2021-04-15 05:14:36,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:14:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21238 states. [2021-04-15 05:14:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21238 to 17258. [2021-04-15 05:14:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17258 states, 17257 states have (on average 2.9188735006084485) internal successors, (50371), 17257 states have internal predecessors, (50371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17258 states to 17258 states and 50371 transitions. [2021-04-15 05:14:36,798 INFO L78 Accepts]: Start accepts. Automaton has 17258 states and 50371 transitions. Word has length 37 [2021-04-15 05:14:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:36,798 INFO L480 AbstractCegarLoop]: Abstraction has 17258 states and 50371 transitions. [2021-04-15 05:14:36,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 17258 states and 50371 transitions. [2021-04-15 05:14:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:36,818 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:36,818 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:37,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 05:14:37,019 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1380437010, now seen corresponding path program 79 times [2021-04-15 05:14:37,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:37,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726661379] [2021-04-15 05:14:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:37,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726661379] [2021-04-15 05:14:37,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412960585] [2021-04-15 05:14:37,052 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:37,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:37,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:37,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:14:37,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550299891] [2021-04-15 05:14:37,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:14:37,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:14:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:14:37,146 INFO L87 Difference]: Start difference. First operand 17258 states and 50371 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:37,324 INFO L93 Difference]: Finished difference Result 20016 states and 58107 transitions. [2021-04-15 05:14:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:14:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-04-15 05:14:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:37,353 INFO L225 Difference]: With dead ends: 20016 [2021-04-15 05:14:37,353 INFO L226 Difference]: Without dead ends: 20016 [2021-04-15 05:14:37,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20016 states. [2021-04-15 05:14:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20016 to 17472. [2021-04-15 05:14:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17472 states, 17471 states have (on average 2.9182073149791083) internal successors, (50984), 17471 states have internal predecessors, (50984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17472 states to 17472 states and 50984 transitions. [2021-04-15 05:14:37,636 INFO L78 Accepts]: Start accepts. Automaton has 17472 states and 50984 transitions. Word has length 37 [2021-04-15 05:14:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:37,636 INFO L480 AbstractCegarLoop]: Abstraction has 17472 states and 50984 transitions. [2021-04-15 05:14:37,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17472 states and 50984 transitions. [2021-04-15 05:14:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:37,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:37,657 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:37,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:37,879 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1382409982, now seen corresponding path program 80 times [2021-04-15 05:14:37,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:37,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162324219] [2021-04-15 05:14:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:37,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162324219] [2021-04-15 05:14:37,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521758179] [2021-04-15 05:14:37,911 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:37,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:37,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:37,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:37,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:38,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:38,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:14:38,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981345484] [2021-04-15 05:14:38,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:14:38,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:38,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:14:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:14:38,011 INFO L87 Difference]: Start difference. First operand 17472 states and 50984 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:38,169 INFO L93 Difference]: Finished difference Result 21557 states and 62279 transitions. [2021-04-15 05:14:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:14:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-04-15 05:14:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:38,202 INFO L225 Difference]: With dead ends: 21557 [2021-04-15 05:14:38,202 INFO L226 Difference]: Without dead ends: 21503 [2021-04-15 05:14:38,202 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21503 states. [2021-04-15 05:14:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21503 to 17472. [2021-04-15 05:14:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17472 states, 17471 states have (on average 2.917749413313491) internal successors, (50976), 17471 states have internal predecessors, (50976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17472 states to 17472 states and 50976 transitions. [2021-04-15 05:14:38,498 INFO L78 Accepts]: Start accepts. Automaton has 17472 states and 50976 transitions. Word has length 37 [2021-04-15 05:14:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:38,498 INFO L480 AbstractCegarLoop]: Abstraction has 17472 states and 50976 transitions. [2021-04-15 05:14:38,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-04-15 05:14:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 17472 states and 50976 transitions. [2021-04-15 05:14:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:38,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:38,518 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:38,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-04-15 05:14:38,719 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1341647984, now seen corresponding path program 81 times [2021-04-15 05:14:38,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:38,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364701089] [2021-04-15 05:14:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:38,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364701089] [2021-04-15 05:14:38,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593549518] [2021-04-15 05:14:38,755 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:38,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:14:38,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:38,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:38,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:38,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:38,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020933921] [2021-04-15 05:14:38,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:38,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:38,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:38,891 INFO L87 Difference]: Start difference. First operand 17472 states and 50976 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:39,234 INFO L93 Difference]: Finished difference Result 19795 states and 57175 transitions. [2021-04-15 05:14:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:14:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:39,261 INFO L225 Difference]: With dead ends: 19795 [2021-04-15 05:14:39,261 INFO L226 Difference]: Without dead ends: 19795 [2021-04-15 05:14:39,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:14:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19795 states. [2021-04-15 05:14:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19795 to 17762. [2021-04-15 05:14:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17762 states, 17761 states have (on average 2.916446146050335) internal successors, (51799), 17761 states have internal predecessors, (51799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17762 states to 17762 states and 51799 transitions. [2021-04-15 05:14:39,588 INFO L78 Accepts]: Start accepts. Automaton has 17762 states and 51799 transitions. Word has length 37 [2021-04-15 05:14:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:39,589 INFO L480 AbstractCegarLoop]: Abstraction has 17762 states and 51799 transitions. [2021-04-15 05:14:39,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 17762 states and 51799 transitions. [2021-04-15 05:14:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:39,608 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:39,609 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:39,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:39,809 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash -461813350, now seen corresponding path program 82 times [2021-04-15 05:14:39,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:39,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526082813] [2021-04-15 05:14:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:39,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526082813] [2021-04-15 05:14:39,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767193442] [2021-04-15 05:14:39,849 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:39,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:39,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:39,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:39,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:39,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028646611] [2021-04-15 05:14:39,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:39,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:39,984 INFO L87 Difference]: Start difference. First operand 17762 states and 51799 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:40,286 INFO L93 Difference]: Finished difference Result 22312 states and 64100 transitions. [2021-04-15 05:14:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:14:40,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-04-15 05:14:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:40,318 INFO L225 Difference]: With dead ends: 22312 [2021-04-15 05:14:40,318 INFO L226 Difference]: Without dead ends: 22270 [2021-04-15 05:14:40,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:14:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22270 states. [2021-04-15 05:14:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22270 to 18356. [2021-04-15 05:14:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18356 states, 18355 states have (on average 2.922800326886407) internal successors, (53648), 18355 states have internal predecessors, (53648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18356 states to 18356 states and 53648 transitions. [2021-04-15 05:14:40,622 INFO L78 Accepts]: Start accepts. Automaton has 18356 states and 53648 transitions. Word has length 37 [2021-04-15 05:14:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:40,622 INFO L480 AbstractCegarLoop]: Abstraction has 18356 states and 53648 transitions. [2021-04-15 05:14:40,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 18356 states and 53648 transitions. [2021-04-15 05:14:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:40,643 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:40,643 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:40,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-04-15 05:14:40,843 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash -664281518, now seen corresponding path program 83 times [2021-04-15 05:14:40,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:40,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236717574] [2021-04-15 05:14:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:40,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236717574] [2021-04-15 05:14:40,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53717412] [2021-04-15 05:14:40,876 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:40,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:14:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:40,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:40,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:40,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741240541] [2021-04-15 05:14:40,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:40,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:40,978 INFO L87 Difference]: Start difference. First operand 18356 states and 53648 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:41,446 INFO L93 Difference]: Finished difference Result 23064 states and 66316 transitions. [2021-04-15 05:14:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:14:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:41,483 INFO L225 Difference]: With dead ends: 23064 [2021-04-15 05:14:41,483 INFO L226 Difference]: Without dead ends: 23064 [2021-04-15 05:14:41,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:14:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-04-15 05:14:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 19500. [2021-04-15 05:14:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19500 states, 19499 states have (on average 2.919431765731576) internal successors, (56926), 19499 states have internal predecessors, (56926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19500 states to 19500 states and 56926 transitions. [2021-04-15 05:14:41,921 INFO L78 Accepts]: Start accepts. Automaton has 19500 states and 56926 transitions. Word has length 37 [2021-04-15 05:14:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:41,921 INFO L480 AbstractCegarLoop]: Abstraction has 19500 states and 56926 transitions. [2021-04-15 05:14:41,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 19500 states and 56926 transitions. [2021-04-15 05:14:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:41,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:41,943 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:42,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:42,144 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:42,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1702207848, now seen corresponding path program 84 times [2021-04-15 05:14:42,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:42,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458772755] [2021-04-15 05:14:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:42,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458772755] [2021-04-15 05:14:42,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122397358] [2021-04-15 05:14:42,187 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:42,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:14:42,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:42,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:42,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:42,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:42,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170094716] [2021-04-15 05:14:42,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:42,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:42,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:42,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:42,328 INFO L87 Difference]: Start difference. First operand 19500 states and 56926 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:42,819 INFO L93 Difference]: Finished difference Result 25828 states and 74407 transitions. [2021-04-15 05:14:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:14:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-04-15 05:14:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:42,861 INFO L225 Difference]: With dead ends: 25828 [2021-04-15 05:14:42,861 INFO L226 Difference]: Without dead ends: 25780 [2021-04-15 05:14:42,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:14:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25780 states. [2021-04-15 05:14:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25780 to 21966. [2021-04-15 05:14:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21966 states, 21965 states have (on average 2.9118597769178236) internal successors, (63959), 21965 states have internal predecessors, (63959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21966 states to 21966 states and 63959 transitions. [2021-04-15 05:14:43,218 INFO L78 Accepts]: Start accepts. Automaton has 21966 states and 63959 transitions. Word has length 37 [2021-04-15 05:14:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:43,218 INFO L480 AbstractCegarLoop]: Abstraction has 21966 states and 63959 transitions. [2021-04-15 05:14:43,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21966 states and 63959 transitions. [2021-04-15 05:14:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:43,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:43,245 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:43,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:43,445 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:43,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:43,445 INFO L82 PathProgramCache]: Analyzing trace with hash 369493936, now seen corresponding path program 85 times [2021-04-15 05:14:43,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:43,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763210148] [2021-04-15 05:14:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763210148] [2021-04-15 05:14:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346552589] [2021-04-15 05:14:43,480 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:43,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:43,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:43,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63533814] [2021-04-15 05:14:43,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:43,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:43,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:43,594 INFO L87 Difference]: Start difference. First operand 21966 states and 63959 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:44,133 INFO L93 Difference]: Finished difference Result 26907 states and 77204 transitions. [2021-04-15 05:14:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:14:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:44,183 INFO L225 Difference]: With dead ends: 26907 [2021-04-15 05:14:44,183 INFO L226 Difference]: Without dead ends: 26907 [2021-04-15 05:14:44,183 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:14:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26907 states. [2021-04-15 05:14:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26907 to 23390. [2021-04-15 05:14:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23390 states, 23389 states have (on average 2.923639317627945) internal successors, (68381), 23389 states have internal predecessors, (68381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23390 states to 23390 states and 68381 transitions. [2021-04-15 05:14:44,746 INFO L78 Accepts]: Start accepts. Automaton has 23390 states and 68381 transitions. Word has length 37 [2021-04-15 05:14:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:44,747 INFO L480 AbstractCegarLoop]: Abstraction has 23390 states and 68381 transitions. [2021-04-15 05:14:44,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 23390 states and 68381 transitions. [2021-04-15 05:14:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:44,774 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:44,774 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:44,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:44,975 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash 158796890, now seen corresponding path program 86 times [2021-04-15 05:14:44,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:44,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45121768] [2021-04-15 05:14:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:45,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45121768] [2021-04-15 05:14:45,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801892655] [2021-04-15 05:14:45,019 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:14:45,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:45,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:45,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:45,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624828198] [2021-04-15 05:14:45,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:45,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:45,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:45,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:45,163 INFO L87 Difference]: Start difference. First operand 23390 states and 68381 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:45,596 INFO L93 Difference]: Finished difference Result 28781 states and 83207 transitions. [2021-04-15 05:14:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:14:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-04-15 05:14:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:45,646 INFO L225 Difference]: With dead ends: 28781 [2021-04-15 05:14:45,647 INFO L226 Difference]: Without dead ends: 28763 [2021-04-15 05:14:45,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:14:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28763 states. [2021-04-15 05:14:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28763 to 23896. [2021-04-15 05:14:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23896 states, 23895 states have (on average 2.924377484829462) internal successors, (69878), 23895 states have internal predecessors, (69878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23896 states to 23896 states and 69878 transitions. [2021-04-15 05:14:46,105 INFO L78 Accepts]: Start accepts. Automaton has 23896 states and 69878 transitions. Word has length 37 [2021-04-15 05:14:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:46,105 INFO L480 AbstractCegarLoop]: Abstraction has 23896 states and 69878 transitions. [2021-04-15 05:14:46,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 23896 states and 69878 transitions. [2021-04-15 05:14:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:46,133 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:46,133 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:46,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 05:14:46,333 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:46,334 INFO L82 PathProgramCache]: Analyzing trace with hash 887548708, now seen corresponding path program 87 times [2021-04-15 05:14:46,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:46,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090407248] [2021-04-15 05:14:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:46,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090407248] [2021-04-15 05:14:46,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944559249] [2021-04-15 05:14:46,367 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:46,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:14:46,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:46,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:46,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:46,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:46,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:46,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921245068] [2021-04-15 05:14:46,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:46,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:46,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:46,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:46,486 INFO L87 Difference]: Start difference. First operand 23896 states and 69878 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:47,046 INFO L93 Difference]: Finished difference Result 28064 states and 80410 transitions. [2021-04-15 05:14:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:14:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-04-15 05:14:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:47,098 INFO L225 Difference]: With dead ends: 28064 [2021-04-15 05:14:47,098 INFO L226 Difference]: Without dead ends: 28057 [2021-04-15 05:14:47,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:14:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-04-15 05:14:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 23076. [2021-04-15 05:14:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23076 states, 23075 states have (on average 2.9116359696641387) internal successors, (67186), 23075 states have internal predecessors, (67186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23076 states to 23076 states and 67186 transitions. [2021-04-15 05:14:47,593 INFO L78 Accepts]: Start accepts. Automaton has 23076 states and 67186 transitions. Word has length 37 [2021-04-15 05:14:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:47,594 INFO L480 AbstractCegarLoop]: Abstraction has 23076 states and 67186 transitions. [2021-04-15 05:14:47,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 23076 states and 67186 transitions. [2021-04-15 05:14:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:47,619 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:47,619 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:47,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-04-15 05:14:47,820 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash 510577554, now seen corresponding path program 88 times [2021-04-15 05:14:47,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:47,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923876961] [2021-04-15 05:14:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:47,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923876961] [2021-04-15 05:14:47,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813733300] [2021-04-15 05:14:47,855 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:47,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:47,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:47,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:47,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:47,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:47,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:14:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055359864] [2021-04-15 05:14:47,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:47,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:47,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:47,966 INFO L87 Difference]: Start difference. First operand 23076 states and 67186 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:48,413 INFO L93 Difference]: Finished difference Result 25308 states and 72855 transitions. [2021-04-15 05:14:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:14:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-04-15 05:14:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:48,459 INFO L225 Difference]: With dead ends: 25308 [2021-04-15 05:14:48,459 INFO L226 Difference]: Without dead ends: 25294 [2021-04-15 05:14:48,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:14:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25294 states. [2021-04-15 05:14:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25294 to 20550. [2021-04-15 05:14:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20550 states, 20549 states have (on average 2.9120151832205945) internal successors, (59839), 20549 states have internal predecessors, (59839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20550 states to 20550 states and 59839 transitions. [2021-04-15 05:14:48,818 INFO L78 Accepts]: Start accepts. Automaton has 20550 states and 59839 transitions. Word has length 37 [2021-04-15 05:14:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:48,819 INFO L480 AbstractCegarLoop]: Abstraction has 20550 states and 59839 transitions. [2021-04-15 05:14:48,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-04-15 05:14:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20550 states and 59839 transitions. [2021-04-15 05:14:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:48,845 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:48,845 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:49,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-04-15 05:14:49,046 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1704477878, now seen corresponding path program 89 times [2021-04-15 05:14:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:49,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764504702] [2021-04-15 05:14:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:49,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764504702] [2021-04-15 05:14:49,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114517093] [2021-04-15 05:14:49,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:49,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:14:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:49,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:14:49,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817743419] [2021-04-15 05:14:49,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:14:49,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:49,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:14:49,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:14:49,205 INFO L87 Difference]: Start difference. First operand 20550 states and 59839 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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) [2021-04-15 05:14:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:49,625 INFO L93 Difference]: Finished difference Result 24191 states and 69468 transitions. [2021-04-15 05:14:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:14:49,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 37 [2021-04-15 05:14:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:49,666 INFO L225 Difference]: With dead ends: 24191 [2021-04-15 05:14:49,666 INFO L226 Difference]: Without dead ends: 24179 [2021-04-15 05:14:49,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:14:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24179 states. [2021-04-15 05:14:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24179 to 20840. [2021-04-15 05:14:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 2.912135899035462) internal successors, (60686), 20839 states have internal predecessors, (60686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 60686 transitions. [2021-04-15 05:14:50,166 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 60686 transitions. Word has length 37 [2021-04-15 05:14:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:50,166 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 60686 transitions. [2021-04-15 05:14:50,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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) [2021-04-15 05:14:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 60686 transitions. [2021-04-15 05:14:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:50,189 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:50,189 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:50,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-04-15 05:14:50,389 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 606853100, now seen corresponding path program 90 times [2021-04-15 05:14:50,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:50,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020561350] [2021-04-15 05:14:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:50,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020561350] [2021-04-15 05:14:50,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692853166] [2021-04-15 05:14:50,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:50,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:14:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:50,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:50,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 05:14:50,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855710398] [2021-04-15 05:14:50,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:50,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:50,544 INFO L87 Difference]: Start difference. First operand 20840 states and 60686 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-04-15 05:14:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:51,045 INFO L93 Difference]: Finished difference Result 25908 states and 74324 transitions. [2021-04-15 05:14:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:14:51,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 37 [2021-04-15 05:14:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:51,094 INFO L225 Difference]: With dead ends: 25908 [2021-04-15 05:14:51,094 INFO L226 Difference]: Without dead ends: 25902 [2021-04-15 05:14:51,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:14:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25902 states. [2021-04-15 05:14:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25902 to 20918. [2021-04-15 05:14:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20918 states, 20917 states have (on average 2.91193765836401) internal successors, (60909), 20917 states have internal predecessors, (60909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20918 states to 20918 states and 60909 transitions. [2021-04-15 05:14:51,571 INFO L78 Accepts]: Start accepts. Automaton has 20918 states and 60909 transitions. Word has length 37 [2021-04-15 05:14:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:51,572 INFO L480 AbstractCegarLoop]: Abstraction has 20918 states and 60909 transitions. [2021-04-15 05:14:51,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-04-15 05:14:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20918 states and 60909 transitions. [2021-04-15 05:14:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:51,601 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:51,601 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:51,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:51,801 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1506148470, now seen corresponding path program 91 times [2021-04-15 05:14:51,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:51,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047815979] [2021-04-15 05:14:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:51,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047815979] [2021-04-15 05:14:51,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255515998] [2021-04-15 05:14:51,852 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:51,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:51,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:51,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 05:14:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722479863] [2021-04-15 05:14:51,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:51,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:51,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:51,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:51,973 INFO L87 Difference]: Start difference. First operand 20918 states and 60909 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-04-15 05:14:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:52,523 INFO L93 Difference]: Finished difference Result 27296 states and 78240 transitions. [2021-04-15 05:14:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:14:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 37 [2021-04-15 05:14:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:52,573 INFO L225 Difference]: With dead ends: 27296 [2021-04-15 05:14:52,574 INFO L226 Difference]: Without dead ends: 27296 [2021-04-15 05:14:52,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:14:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27296 states. [2021-04-15 05:14:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27296 to 22550. [2021-04-15 05:14:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22550 states, 22549 states have (on average 2.9157390571643975) internal successors, (65747), 22549 states have internal predecessors, (65747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22550 states to 22550 states and 65747 transitions. [2021-04-15 05:14:52,997 INFO L78 Accepts]: Start accepts. Automaton has 22550 states and 65747 transitions. Word has length 37 [2021-04-15 05:14:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:52,997 INFO L480 AbstractCegarLoop]: Abstraction has 22550 states and 65747 transitions. [2021-04-15 05:14:52,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-04-15 05:14:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22550 states and 65747 transitions. [2021-04-15 05:14:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:53,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:53,027 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:53,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:53,227 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:53,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1647232088, now seen corresponding path program 92 times [2021-04-15 05:14:53,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:53,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126377069] [2021-04-15 05:14:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:14:53,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126377069] [2021-04-15 05:14:53,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518701958] [2021-04-15 05:14:53,266 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:53,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:53,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:53,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 05:14:53,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100135355] [2021-04-15 05:14:53,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:53,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:53,381 INFO L87 Difference]: Start difference. First operand 22550 states and 65747 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-04-15 05:14:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:53,834 INFO L93 Difference]: Finished difference Result 26619 states and 76420 transitions. [2021-04-15 05:14:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:14:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-04-15 05:14:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:53,886 INFO L225 Difference]: With dead ends: 26619 [2021-04-15 05:14:53,886 INFO L226 Difference]: Without dead ends: 26598 [2021-04-15 05:14:53,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:14:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26598 states. [2021-04-15 05:14:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26598 to 20132. [2021-04-15 05:14:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20132 states, 20131 states have (on average 2.9061646217276835) internal successors, (58504), 20131 states have internal predecessors, (58504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20132 states to 20132 states and 58504 transitions. [2021-04-15 05:14:54,340 INFO L78 Accepts]: Start accepts. Automaton has 20132 states and 58504 transitions. Word has length 37 [2021-04-15 05:14:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:54,340 INFO L480 AbstractCegarLoop]: Abstraction has 20132 states and 58504 transitions. [2021-04-15 05:14:54,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-04-15 05:14:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 20132 states and 58504 transitions. [2021-04-15 05:14:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:54,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:54,364 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:54,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-04-15 05:14:54,565 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1731630862, now seen corresponding path program 93 times [2021-04-15 05:14:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:54,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510730095] [2021-04-15 05:14:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:54,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510730095] [2021-04-15 05:14:54,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905834899] [2021-04-15 05:14:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:54,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:14:54,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:54,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:54,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:54,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:54,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:14:54,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010699558] [2021-04-15 05:14:54,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:14:54,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:54,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:14:54,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:14:54,714 INFO L87 Difference]: Start difference. First operand 20132 states and 58504 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2021-04-15 05:14:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:55,172 INFO L93 Difference]: Finished difference Result 25298 states and 72495 transitions. [2021-04-15 05:14:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:14:55,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 37 [2021-04-15 05:14:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:55,219 INFO L225 Difference]: With dead ends: 25298 [2021-04-15 05:14:55,219 INFO L226 Difference]: Without dead ends: 25242 [2021-04-15 05:14:55,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:14:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25242 states. [2021-04-15 05:14:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25242 to 20732. [2021-04-15 05:14:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20732 states, 20731 states have (on average 2.910809898220057) internal successors, (60344), 20731 states have internal predecessors, (60344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20732 states to 20732 states and 60344 transitions. [2021-04-15 05:14:55,590 INFO L78 Accepts]: Start accepts. Automaton has 20732 states and 60344 transitions. Word has length 37 [2021-04-15 05:14:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:55,591 INFO L480 AbstractCegarLoop]: Abstraction has 20732 states and 60344 transitions. [2021-04-15 05:14:55,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2021-04-15 05:14:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 20732 states and 60344 transitions. [2021-04-15 05:14:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:55,614 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:55,615 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:55,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:55,815 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1163931468, now seen corresponding path program 94 times [2021-04-15 05:14:55,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:55,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46554339] [2021-04-15 05:14:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:55,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46554339] [2021-04-15 05:14:55,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810996167] [2021-04-15 05:14:55,859 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:55,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:55,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:55,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:55,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:55,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:55,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:14:55,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648403262] [2021-04-15 05:14:55,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:14:55,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:55,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:14:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:14:55,985 INFO L87 Difference]: Start difference. First operand 20732 states and 60344 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:56,426 INFO L93 Difference]: Finished difference Result 25729 states and 73778 transitions. [2021-04-15 05:14:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:14:56,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:56,468 INFO L225 Difference]: With dead ends: 25729 [2021-04-15 05:14:56,468 INFO L226 Difference]: Without dead ends: 25717 [2021-04-15 05:14:56,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:14:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25717 states. [2021-04-15 05:14:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25717 to 21912. [2021-04-15 05:14:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21912 states, 21911 states have (on average 2.9035644196978687) internal successors, (63620), 21911 states have internal predecessors, (63620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21912 states to 21912 states and 63620 transitions. [2021-04-15 05:14:56,872 INFO L78 Accepts]: Start accepts. Automaton has 21912 states and 63620 transitions. Word has length 37 [2021-04-15 05:14:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:56,872 INFO L480 AbstractCegarLoop]: Abstraction has 21912 states and 63620 transitions. [2021-04-15 05:14:56,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21912 states and 63620 transitions. [2021-04-15 05:14:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:56,898 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:56,898 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:57,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:57,099 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1502315474, now seen corresponding path program 95 times [2021-04-15 05:14:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:57,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96822727] [2021-04-15 05:14:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:57,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96822727] [2021-04-15 05:14:57,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728629190] [2021-04-15 05:14:57,132 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:57,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:14:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:57,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:57,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:57,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 05:14:57,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488651905] [2021-04-15 05:14:57,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:14:57,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:57,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:14:57,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:14:57,274 INFO L87 Difference]: Start difference. First operand 21912 states and 63620 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:57,851 INFO L93 Difference]: Finished difference Result 30602 states and 87580 transitions. [2021-04-15 05:14:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:14:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:57,901 INFO L225 Difference]: With dead ends: 30602 [2021-04-15 05:14:57,901 INFO L226 Difference]: Without dead ends: 30596 [2021-04-15 05:14:57,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:14:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30596 states. [2021-04-15 05:14:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30596 to 25152. [2021-04-15 05:14:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25152 states, 25151 states have (on average 2.9081945051886606) internal successors, (73144), 25151 states have internal predecessors, (73144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25152 states to 25152 states and 73144 transitions. [2021-04-15 05:14:58,436 INFO L78 Accepts]: Start accepts. Automaton has 25152 states and 73144 transitions. Word has length 37 [2021-04-15 05:14:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:58,436 INFO L480 AbstractCegarLoop]: Abstraction has 25152 states and 73144 transitions. [2021-04-15 05:14:58,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 25152 states and 73144 transitions. [2021-04-15 05:14:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:14:58,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:58,464 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:14:58,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-04-15 05:14:58,664 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1313090188, now seen corresponding path program 96 times [2021-04-15 05:14:58,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:58,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109727160] [2021-04-15 05:14:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:58,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109727160] [2021-04-15 05:14:58,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130937541] [2021-04-15 05:14:58,688 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:58,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:14:58,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:14:58,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:58,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:58,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-04-15 05:14:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113238696] [2021-04-15 05:14:58,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:14:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:14:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:14:58,825 INFO L87 Difference]: Start difference. First operand 25152 states and 73144 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:59,375 INFO L93 Difference]: Finished difference Result 35455 states and 101725 transitions. [2021-04-15 05:14:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:14:59,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:59,431 INFO L225 Difference]: With dead ends: 35455 [2021-04-15 05:14:59,431 INFO L226 Difference]: Without dead ends: 35455 [2021-04-15 05:14:59,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:14:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35455 states. [2021-04-15 05:14:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35455 to 30340. [2021-04-15 05:14:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30340 states, 30339 states have (on average 2.9054352483601966) internal successors, (88148), 30339 states have internal predecessors, (88148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30340 states to 30340 states and 88148 transitions. [2021-04-15 05:14:59,995 INFO L78 Accepts]: Start accepts. Automaton has 30340 states and 88148 transitions. Word has length 37 [2021-04-15 05:14:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:59,995 INFO L480 AbstractCegarLoop]: Abstraction has 30340 states and 88148 transitions. [2021-04-15 05:14:59,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 30340 states and 88148 transitions. [2021-04-15 05:15:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:15:00,036 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:00,036 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:15:00,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:00,238 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1172006570, now seen corresponding path program 97 times [2021-04-15 05:15:00,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:00,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87256774] [2021-04-15 05:15:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:15:00,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87256774] [2021-04-15 05:15:00,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429272383] [2021-04-15 05:15:00,267 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:15:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:00,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:15:00,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:00,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:00,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-04-15 05:15:00,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854865892] [2021-04-15 05:15:00,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:15:00,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:00,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:15:00,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:15:00,409 INFO L87 Difference]: Start difference. First operand 30340 states and 88148 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:00,890 INFO L93 Difference]: Finished difference Result 34916 states and 100293 transitions. [2021-04-15 05:15:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:15:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:15:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:00,948 INFO L225 Difference]: With dead ends: 34916 [2021-04-15 05:15:00,948 INFO L226 Difference]: Without dead ends: 34902 [2021-04-15 05:15:00,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 05:15:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34902 states. [2021-04-15 05:15:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34902 to 29980. [2021-04-15 05:15:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29980 states, 29979 states have (on average 2.901297574969145) internal successors, (86978), 29979 states have internal predecessors, (86978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29980 states to 29980 states and 86978 transitions. [2021-04-15 05:15:01,655 INFO L78 Accepts]: Start accepts. Automaton has 29980 states and 86978 transitions. Word has length 37 [2021-04-15 05:15:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:01,655 INFO L480 AbstractCegarLoop]: Abstraction has 29980 states and 86978 transitions. [2021-04-15 05:15:01,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29980 states and 86978 transitions. [2021-04-15 05:15:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:15:01,695 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:01,695 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:15:01,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 05:15:01,897 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1087607796, now seen corresponding path program 98 times [2021-04-15 05:15:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:01,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393446304] [2021-04-15 05:15:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:15:01,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393446304] [2021-04-15 05:15:01,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544292249] [2021-04-15 05:15:01,927 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:01,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:15:01,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:15:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:02,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:02,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 05:15:02,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918466445] [2021-04-15 05:15:02,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:15:02,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:02,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:15:02,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:15:02,053 INFO L87 Difference]: Start difference. First operand 29980 states and 86978 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:02,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:02,540 INFO L93 Difference]: Finished difference Result 35525 states and 101994 transitions. [2021-04-15 05:15:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:15:02,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:15:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:02,604 INFO L225 Difference]: With dead ends: 35525 [2021-04-15 05:15:02,605 INFO L226 Difference]: Without dead ends: 35469 [2021-04-15 05:15:02,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:15:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35469 states. [2021-04-15 05:15:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35469 to 30928. [2021-04-15 05:15:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30928 states, 30927 states have (on average 2.9010896627542277) internal successors, (89722), 30927 states have internal predecessors, (89722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30928 states to 30928 states and 89722 transitions. [2021-04-15 05:15:03,187 INFO L78 Accepts]: Start accepts. Automaton has 30928 states and 89722 transitions. Word has length 37 [2021-04-15 05:15:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:03,187 INFO L480 AbstractCegarLoop]: Abstraction has 30928 states and 89722 transitions. [2021-04-15 05:15:03,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30928 states and 89722 transitions. [2021-04-15 05:15:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 05:15:03,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:03,229 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-04-15 05:15:03,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 05:15:03,430 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash 552429714, now seen corresponding path program 99 times [2021-04-15 05:15:03,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:03,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135689219] [2021-04-15 05:15:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:03,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135689219] [2021-04-15 05:15:03,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821215145] [2021-04-15 05:15:03,473 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:03,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:15:03,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:15:03,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:03,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:03,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:15:03,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904510979] [2021-04-15 05:15:03,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:15:03,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:15:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:15:03,601 INFO L87 Difference]: Start difference. First operand 30928 states and 89722 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:04,027 INFO L93 Difference]: Finished difference Result 36591 states and 105181 transitions. [2021-04-15 05:15:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:15:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:15:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:04,101 INFO L225 Difference]: With dead ends: 36591 [2021-04-15 05:15:04,102 INFO L226 Difference]: Without dead ends: 36493 [2021-04-15 05:15:04,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:15:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36493 states. [2021-04-15 05:15:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36493 to 32222. [2021-04-15 05:15:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32222 states, 32221 states have (on average 2.900561745445517) internal successors, (93459), 32221 states have internal predecessors, (93459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32222 states to 32222 states and 93459 transitions. [2021-04-15 05:15:04,690 INFO L78 Accepts]: Start accepts. Automaton has 32222 states and 93459 transitions. Word has length 37 [2021-04-15 05:15:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:04,690 INFO L480 AbstractCegarLoop]: Abstraction has 32222 states and 93459 transitions. [2021-04-15 05:15:04,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 32222 states and 93459 transitions. [2021-04-15 05:15:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:04,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:04,931 INFO L551 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] [2021-04-15 05:15:05,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-04-15 05:15:05,132 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1312568382, now seen corresponding path program 100 times [2021-04-15 05:15:05,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:05,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884979540] [2021-04-15 05:15:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:05,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884979540] [2021-04-15 05:15:05,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199196966] [2021-04-15 05:15:05,314 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:05,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:15:05,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:05,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:05,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-04-15 05:15:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001182623] [2021-04-15 05:15:05,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:15:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:15:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:15:05,550 INFO L87 Difference]: Start difference. First operand 32222 states and 93459 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:05,979 INFO L93 Difference]: Finished difference Result 45612 states and 132049 transitions. [2021-04-15 05:15:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:15:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:06,079 INFO L225 Difference]: With dead ends: 45612 [2021-04-15 05:15:06,079 INFO L226 Difference]: Without dead ends: 45574 [2021-04-15 05:15:06,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45574 states. [2021-04-15 05:15:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45574 to 32250. [2021-04-15 05:15:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32250 states, 32249 states have (on average 2.8999038729883098) internal successors, (93519), 32249 states have internal predecessors, (93519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32250 states to 32250 states and 93519 transitions. [2021-04-15 05:15:07,086 INFO L78 Accepts]: Start accepts. Automaton has 32250 states and 93519 transitions. Word has length 40 [2021-04-15 05:15:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:07,086 INFO L480 AbstractCegarLoop]: Abstraction has 32250 states and 93519 transitions. [2021-04-15 05:15:07,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32250 states and 93519 transitions. [2021-04-15 05:15:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:07,134 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:07,134 INFO L551 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] [2021-04-15 05:15:07,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-04-15 05:15:07,336 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:07,336 INFO L82 PathProgramCache]: Analyzing trace with hash 920480774, now seen corresponding path program 101 times [2021-04-15 05:15:07,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:07,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731692081] [2021-04-15 05:15:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:07,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731692081] [2021-04-15 05:15:07,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051823979] [2021-04-15 05:15:07,596 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:07,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:15:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:07,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:15:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:07,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:07,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-04-15 05:15:07,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900261499] [2021-04-15 05:15:07,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:15:07,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:15:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:15:07,803 INFO L87 Difference]: Start difference. First operand 32250 states and 93519 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:08,445 INFO L93 Difference]: Finished difference Result 53299 states and 154498 transitions. [2021-04-15 05:15:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:15:08,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:08,543 INFO L225 Difference]: With dead ends: 53299 [2021-04-15 05:15:08,543 INFO L226 Difference]: Without dead ends: 53217 [2021-04-15 05:15:08,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:15:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53217 states. [2021-04-15 05:15:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53217 to 38743. [2021-04-15 05:15:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38743 states, 38742 states have (on average 2.906535542821744) internal successors, (112605), 38742 states have internal predecessors, (112605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38743 states to 38743 states and 112605 transitions. [2021-04-15 05:15:09,432 INFO L78 Accepts]: Start accepts. Automaton has 38743 states and 112605 transitions. Word has length 40 [2021-04-15 05:15:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:09,432 INFO L480 AbstractCegarLoop]: Abstraction has 38743 states and 112605 transitions. [2021-04-15 05:15:09,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 38743 states and 112605 transitions. [2021-04-15 05:15:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:09,479 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:09,479 INFO L551 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] [2021-04-15 05:15:09,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-04-15 05:15:09,680 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1516586690, now seen corresponding path program 102 times [2021-04-15 05:15:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:09,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568793500] [2021-04-15 05:15:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568793500] [2021-04-15 05:15:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10482066] [2021-04-15 05:15:09,836 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:09,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:15:09,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:15:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:10,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:10,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-04-15 05:15:10,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305667457] [2021-04-15 05:15:10,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:15:10,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:15:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:15:10,084 INFO L87 Difference]: Start difference. First operand 38743 states and 112605 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:10,721 INFO L93 Difference]: Finished difference Result 53283 states and 154460 transitions. [2021-04-15 05:15:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:15:10,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:10,841 INFO L225 Difference]: With dead ends: 53283 [2021-04-15 05:15:10,842 INFO L226 Difference]: Without dead ends: 53171 [2021-04-15 05:15:10,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:15:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53171 states. [2021-04-15 05:15:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53171 to 37569. [2021-04-15 05:15:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37569 states, 37568 states have (on average 2.902044293015332) internal successors, (109024), 37568 states have internal predecessors, (109024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37569 states to 37569 states and 109024 transitions. [2021-04-15 05:15:11,833 INFO L78 Accepts]: Start accepts. Automaton has 37569 states and 109024 transitions. Word has length 40 [2021-04-15 05:15:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:11,833 INFO L480 AbstractCegarLoop]: Abstraction has 37569 states and 109024 transitions. [2021-04-15 05:15:11,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 37569 states and 109024 transitions. [2021-04-15 05:15:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:11,889 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:11,889 INFO L551 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] [2021-04-15 05:15:12,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:12,090 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:12,090 INFO L82 PathProgramCache]: Analyzing trace with hash 459063162, now seen corresponding path program 103 times [2021-04-15 05:15:12,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:12,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415556864] [2021-04-15 05:15:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:12,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415556864] [2021-04-15 05:15:12,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035712158] [2021-04-15 05:15:12,229 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:12,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:15:12,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:12,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:12,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-04-15 05:15:12,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193775216] [2021-04-15 05:15:12,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:15:12,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:12,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:15:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:15:12,444 INFO L87 Difference]: Start difference. First operand 37569 states and 109024 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:13,092 INFO L93 Difference]: Finished difference Result 53095 states and 153814 transitions. [2021-04-15 05:15:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:15:13,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:13,205 INFO L225 Difference]: With dead ends: 53095 [2021-04-15 05:15:13,205 INFO L226 Difference]: Without dead ends: 52978 [2021-04-15 05:15:13,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:15:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52978 states. [2021-04-15 05:15:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52978 to 38199. [2021-04-15 05:15:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38199 states, 38198 states have (on average 2.9027959579035554) internal successors, (110881), 38198 states have internal predecessors, (110881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38199 states to 38199 states and 110881 transitions. [2021-04-15 05:15:14,164 INFO L78 Accepts]: Start accepts. Automaton has 38199 states and 110881 transitions. Word has length 40 [2021-04-15 05:15:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:14,164 INFO L480 AbstractCegarLoop]: Abstraction has 38199 states and 110881 transitions. [2021-04-15 05:15:14,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 38199 states and 110881 transitions. [2021-04-15 05:15:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:14,218 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:14,218 INFO L551 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] [2021-04-15 05:15:14,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:14,419 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1637637984, now seen corresponding path program 104 times [2021-04-15 05:15:14,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:14,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337180962] [2021-04-15 05:15:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:14,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337180962] [2021-04-15 05:15:14,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033325016] [2021-04-15 05:15:14,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:14,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:15:14,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:14,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:14,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:14,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:14,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-04-15 05:15:14,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385282922] [2021-04-15 05:15:14,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:14,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:14,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:14,972 INFO L87 Difference]: Start difference. First operand 38199 states and 110881 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:15,519 INFO L93 Difference]: Finished difference Result 53079 states and 153808 transitions. [2021-04-15 05:15:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:15:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:15,648 INFO L225 Difference]: With dead ends: 53079 [2021-04-15 05:15:15,649 INFO L226 Difference]: Without dead ends: 53003 [2021-04-15 05:15:15,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:15:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53003 states. [2021-04-15 05:15:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53003 to 38855. [2021-04-15 05:15:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38855 states, 38854 states have (on average 2.9040768003294386) internal successors, (112835), 38854 states have internal predecessors, (112835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38855 states to 38855 states and 112835 transitions. [2021-04-15 05:15:16,618 INFO L78 Accepts]: Start accepts. Automaton has 38855 states and 112835 transitions. Word has length 40 [2021-04-15 05:15:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:16,618 INFO L480 AbstractCegarLoop]: Abstraction has 38855 states and 112835 transitions. [2021-04-15 05:15:16,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 38855 states and 112835 transitions. [2021-04-15 05:15:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:16,897 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:16,897 INFO L551 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] [2021-04-15 05:15:17,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:17,110 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1202515386, now seen corresponding path program 105 times [2021-04-15 05:15:17,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:17,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663344130] [2021-04-15 05:15:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:17,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663344130] [2021-04-15 05:15:17,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689849070] [2021-04-15 05:15:17,294 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:17,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:15:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:17,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:17,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:17,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-04-15 05:15:17,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289194341] [2021-04-15 05:15:17,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:17,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:17,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:17,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:17,539 INFO L87 Difference]: Start difference. First operand 38855 states and 112835 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:17,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:17,935 INFO L93 Difference]: Finished difference Result 52979 states and 153595 transitions. [2021-04-15 05:15:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:15:17,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:17,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:18,044 INFO L225 Difference]: With dead ends: 52979 [2021-04-15 05:15:18,045 INFO L226 Difference]: Without dead ends: 52941 [2021-04-15 05:15:18,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52941 states. [2021-04-15 05:15:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52941 to 38877. [2021-04-15 05:15:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38877 states, 38876 states have (on average 2.90410536063381) internal successors, (112900), 38876 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38877 states to 38877 states and 112900 transitions. [2021-04-15 05:15:19,051 INFO L78 Accepts]: Start accepts. Automaton has 38877 states and 112900 transitions. Word has length 40 [2021-04-15 05:15:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:19,051 INFO L480 AbstractCegarLoop]: Abstraction has 38877 states and 112900 transitions. [2021-04-15 05:15:19,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 38877 states and 112900 transitions. [2021-04-15 05:15:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:19,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:19,102 INFO L551 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] [2021-04-15 05:15:19,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-04-15 05:15:19,303 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:19,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1556734402, now seen corresponding path program 106 times [2021-04-15 05:15:19,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:19,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208546980] [2021-04-15 05:15:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:19,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208546980] [2021-04-15 05:15:19,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235079069] [2021-04-15 05:15:19,450 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:19,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:15:19,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:15:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:19,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:19,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-04-15 05:15:19,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388961317] [2021-04-15 05:15:19,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:19,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:19,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:19,698 INFO L87 Difference]: Start difference. First operand 38877 states and 112900 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:20,226 INFO L93 Difference]: Finished difference Result 52587 states and 152586 transitions. [2021-04-15 05:15:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:15:20,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:15:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:20,333 INFO L225 Difference]: With dead ends: 52587 [2021-04-15 05:15:20,333 INFO L226 Difference]: Without dead ends: 52481 [2021-04-15 05:15:20,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:15:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52481 states. [2021-04-15 05:15:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52481 to 49293. [2021-04-15 05:15:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49293 states, 49292 states have (on average 2.9144688793313316) internal successors, (143660), 49292 states have internal predecessors, (143660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49293 states to 49293 states and 143660 transitions. [2021-04-15 05:15:21,646 INFO L78 Accepts]: Start accepts. Automaton has 49293 states and 143660 transitions. Word has length 40 [2021-04-15 05:15:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:21,646 INFO L480 AbstractCegarLoop]: Abstraction has 49293 states and 143660 transitions. [2021-04-15 05:15:21,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 49293 states and 143660 transitions. [2021-04-15 05:15:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:21,709 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:21,709 INFO L551 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] [2021-04-15 05:15:21,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:21,910 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:21,910 INFO L82 PathProgramCache]: Analyzing trace with hash -280230338, now seen corresponding path program 107 times [2021-04-15 05:15:21,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:21,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746375542] [2021-04-15 05:15:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746375542] [2021-04-15 05:15:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235461186] [2021-04-15 05:15:22,066 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:22,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:15:22,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:22,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:22,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:22,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-04-15 05:15:22,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440208878] [2021-04-15 05:15:22,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:22,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:22,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:22,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:22,339 INFO L87 Difference]: Start difference. First operand 49293 states and 143660 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:22,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:22,895 INFO L93 Difference]: Finished difference Result 53602 states and 155503 transitions. [2021-04-15 05:15:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:15:22,895 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:15:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:23,017 INFO L225 Difference]: With dead ends: 53602 [2021-04-15 05:15:23,017 INFO L226 Difference]: Without dead ends: 53478 [2021-04-15 05:15:23,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:15:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53478 states. [2021-04-15 05:15:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53478 to 48047. [2021-04-15 05:15:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48047 states, 48046 states have (on average 2.9100237272613745) internal successors, (139815), 48046 states have internal predecessors, (139815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48047 states to 48047 states and 139815 transitions. [2021-04-15 05:15:24,239 INFO L78 Accepts]: Start accepts. Automaton has 48047 states and 139815 transitions. Word has length 40 [2021-04-15 05:15:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:24,239 INFO L480 AbstractCegarLoop]: Abstraction has 48047 states and 139815 transitions. [2021-04-15 05:15:24,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 48047 states and 139815 transitions. [2021-04-15 05:15:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:24,299 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:24,299 INFO L551 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] [2021-04-15 05:15:24,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-04-15 05:15:24,501 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1270374918, now seen corresponding path program 108 times [2021-04-15 05:15:24,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:24,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990894436] [2021-04-15 05:15:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:24,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990894436] [2021-04-15 05:15:24,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841085541] [2021-04-15 05:15:24,631 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:24,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:15:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:24,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:24,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-04-15 05:15:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688470819] [2021-04-15 05:15:24,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:24,890 INFO L87 Difference]: Start difference. First operand 48047 states and 139815 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:25,444 INFO L93 Difference]: Finished difference Result 51601 states and 149422 transitions. [2021-04-15 05:15:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:15:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:15:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:25,549 INFO L225 Difference]: With dead ends: 51601 [2021-04-15 05:15:25,550 INFO L226 Difference]: Without dead ends: 51477 [2021-04-15 05:15:25,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:15:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51477 states. [2021-04-15 05:15:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51477 to 47339. [2021-04-15 05:15:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47339 states, 47338 states have (on average 2.9092695086399933) internal successors, (137719), 47338 states have internal predecessors, (137719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47339 states to 47339 states and 137719 transitions. [2021-04-15 05:15:26,946 INFO L78 Accepts]: Start accepts. Automaton has 47339 states and 137719 transitions. Word has length 40 [2021-04-15 05:15:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:26,946 INFO L480 AbstractCegarLoop]: Abstraction has 47339 states and 137719 transitions. [2021-04-15 05:15:26,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 47339 states and 137719 transitions. [2021-04-15 05:15:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:27,015 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:27,015 INFO L551 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] [2021-04-15 05:15:27,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:27,216 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 626264254, now seen corresponding path program 109 times [2021-04-15 05:15:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:27,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141605905] [2021-04-15 05:15:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:27,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141605905] [2021-04-15 05:15:27,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897213110] [2021-04-15 05:15:27,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:27,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:27,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-04-15 05:15:27,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330243628] [2021-04-15 05:15:27,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:27,583 INFO L87 Difference]: Start difference. First operand 47339 states and 137719 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:28,077 INFO L93 Difference]: Finished difference Result 50426 states and 146069 transitions. [2021-04-15 05:15:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:15:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:15:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:28,167 INFO L225 Difference]: With dead ends: 50426 [2021-04-15 05:15:28,168 INFO L226 Difference]: Without dead ends: 50350 [2021-04-15 05:15:28,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:15:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50350 states. [2021-04-15 05:15:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50350 to 46743. [2021-04-15 05:15:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46743 states, 46742 states have (on average 2.908326558555475) internal successors, (135941), 46742 states have internal predecessors, (135941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46743 states to 46743 states and 135941 transitions. [2021-04-15 05:15:29,096 INFO L78 Accepts]: Start accepts. Automaton has 46743 states and 135941 transitions. Word has length 40 [2021-04-15 05:15:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:29,096 INFO L480 AbstractCegarLoop]: Abstraction has 46743 states and 135941 transitions. [2021-04-15 05:15:29,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:15:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 46743 states and 135941 transitions. [2021-04-15 05:15:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:29,153 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:29,153 INFO L551 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] [2021-04-15 05:15:29,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:29,357 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1839351558, now seen corresponding path program 110 times [2021-04-15 05:15:29,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:29,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30523326] [2021-04-15 05:15:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30523326] [2021-04-15 05:15:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16433784] [2021-04-15 05:15:29,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:29,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:15:29,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:29,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:29,865 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-04-15 05:15:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:30,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:30,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-04-15 05:15:30,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692800622] [2021-04-15 05:15:30,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:15:30,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:15:30,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:30,007 INFO L87 Difference]: Start difference. First operand 46743 states and 135941 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 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) [2021-04-15 05:15:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:30,429 INFO L93 Difference]: Finished difference Result 50406 states and 146007 transitions. [2021-04-15 05:15:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:15:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 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 40 [2021-04-15 05:15:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:30,528 INFO L225 Difference]: With dead ends: 50406 [2021-04-15 05:15:30,529 INFO L226 Difference]: Without dead ends: 50330 [2021-04-15 05:15:30,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:15:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50330 states. [2021-04-15 05:15:31,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50330 to 47351. [2021-04-15 05:15:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47351 states, 47350 states have (on average 2.9088912354804646) internal successors, (137736), 47350 states have internal predecessors, (137736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47351 states to 47351 states and 137736 transitions. [2021-04-15 05:15:31,562 INFO L78 Accepts]: Start accepts. Automaton has 47351 states and 137736 transitions. Word has length 40 [2021-04-15 05:15:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:31,562 INFO L480 AbstractCegarLoop]: Abstraction has 47351 states and 137736 transitions. [2021-04-15 05:15:31,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 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) [2021-04-15 05:15:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47351 states and 137736 transitions. [2021-04-15 05:15:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:31,624 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:31,624 INFO L551 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] [2021-04-15 05:15:31,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:31,829 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash 665879302, now seen corresponding path program 111 times [2021-04-15 05:15:31,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:31,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207275937] [2021-04-15 05:15:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:31,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207275937] [2021-04-15 05:15:31,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272301959] [2021-04-15 05:15:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:32,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:15:32,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:32,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:32,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:32,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-04-15 05:15:32,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122437542] [2021-04-15 05:15:32,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:15:32,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:32,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:15:32,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:15:32,286 INFO L87 Difference]: Start difference. First operand 47351 states and 137736 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-04-15 05:15:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:32,818 INFO L93 Difference]: Finished difference Result 57495 states and 167441 transitions. [2021-04-15 05:15:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:15:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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 40 [2021-04-15 05:15:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:33,229 INFO L225 Difference]: With dead ends: 57495 [2021-04-15 05:15:33,230 INFO L226 Difference]: Without dead ends: 57373 [2021-04-15 05:15:33,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:15:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57373 states. [2021-04-15 05:15:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57373 to 56865. [2021-04-15 05:15:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56865 states, 56864 states have (on average 2.919017304445695) internal successors, (165987), 56864 states have internal predecessors, (165987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56865 states to 56865 states and 165987 transitions. [2021-04-15 05:15:34,447 INFO L78 Accepts]: Start accepts. Automaton has 56865 states and 165987 transitions. Word has length 40 [2021-04-15 05:15:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:34,447 INFO L480 AbstractCegarLoop]: Abstraction has 56865 states and 165987 transitions. [2021-04-15 05:15:34,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-04-15 05:15:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 56865 states and 165987 transitions. [2021-04-15 05:15:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:34,539 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:34,539 INFO L551 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] [2021-04-15 05:15:34,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-04-15 05:15:34,740 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash -557051134, now seen corresponding path program 112 times [2021-04-15 05:15:34,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:34,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142640967] [2021-04-15 05:15:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:34,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142640967] [2021-04-15 05:15:34,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846266716] [2021-04-15 05:15:34,843 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:34,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:15:34,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:34,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:35,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:35,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-04-15 05:15:35,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934911740] [2021-04-15 05:15:35,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:35,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:35,108 INFO L87 Difference]: Start difference. First operand 56865 states and 165987 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:15:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:35,663 INFO L93 Difference]: Finished difference Result 58188 states and 169517 transitions. [2021-04-15 05:15:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:15:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 40 [2021-04-15 05:15:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:35,800 INFO L225 Difference]: With dead ends: 58188 [2021-04-15 05:15:35,801 INFO L226 Difference]: Without dead ends: 58058 [2021-04-15 05:15:35,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:15:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58058 states. [2021-04-15 05:15:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58058 to 52365. [2021-04-15 05:15:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52365 states, 52364 states have (on average 2.9161446795508366) internal successors, (152701), 52364 states have internal predecessors, (152701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52365 states to 52365 states and 152701 transitions. [2021-04-15 05:15:37,482 INFO L78 Accepts]: Start accepts. Automaton has 52365 states and 152701 transitions. Word has length 40 [2021-04-15 05:15:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:37,482 INFO L480 AbstractCegarLoop]: Abstraction has 52365 states and 152701 transitions. [2021-04-15 05:15:37,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:15:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 52365 states and 152701 transitions. [2021-04-15 05:15:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:37,570 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:37,570 INFO L551 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] [2021-04-15 05:15:37,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:37,771 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash -161255976, now seen corresponding path program 113 times [2021-04-15 05:15:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:37,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083536390] [2021-04-15 05:15:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:37,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083536390] [2021-04-15 05:15:37,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104547947] [2021-04-15 05:15:37,879 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:37,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:15:37,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:37,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:38,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:38,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-04-15 05:15:38,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114008671] [2021-04-15 05:15:38,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:38,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:38,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:38,134 INFO L87 Difference]: Start difference. First operand 52365 states and 152701 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:15:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:38,537 INFO L93 Difference]: Finished difference Result 53207 states and 154734 transitions. [2021-04-15 05:15:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:15:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 40 [2021-04-15 05:15:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:38,642 INFO L225 Difference]: With dead ends: 53207 [2021-04-15 05:15:38,642 INFO L226 Difference]: Without dead ends: 53090 [2021-04-15 05:15:38,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:15:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53090 states. [2021-04-15 05:15:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53090 to 50967. [2021-04-15 05:15:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50967 states, 50966 states have (on average 2.9151983675391437) internal successors, (148576), 50966 states have internal predecessors, (148576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50967 states to 50967 states and 148576 transitions. [2021-04-15 05:15:39,727 INFO L78 Accepts]: Start accepts. Automaton has 50967 states and 148576 transitions. Word has length 40 [2021-04-15 05:15:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:39,727 INFO L480 AbstractCegarLoop]: Abstraction has 50967 states and 148576 transitions. [2021-04-15 05:15:39,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:15:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50967 states and 148576 transitions. [2021-04-15 05:15:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:39,796 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:39,796 INFO L551 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] [2021-04-15 05:15:39,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:39,997 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2036427680, now seen corresponding path program 114 times [2021-04-15 05:15:39,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:39,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019533326] [2021-04-15 05:15:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019533326] [2021-04-15 05:15:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593777488] [2021-04-15 05:15:40,134 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:40,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:15:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:40,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:40,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:40,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-04-15 05:15:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213431492] [2021-04-15 05:15:40,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:15:40,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:15:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:40,399 INFO L87 Difference]: Start difference. First operand 50967 states and 148576 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:15:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:41,121 INFO L93 Difference]: Finished difference Result 53177 states and 154815 transitions. [2021-04-15 05:15:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:15:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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 40 [2021-04-15 05:15:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:41,230 INFO L225 Difference]: With dead ends: 53177 [2021-04-15 05:15:41,230 INFO L226 Difference]: Without dead ends: 53101 [2021-04-15 05:15:41,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:15:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53101 states. [2021-04-15 05:15:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53101 to 50373. [2021-04-15 05:15:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50373 states, 50372 states have (on average 2.9174342888906537) internal successors, (146957), 50372 states have internal predecessors, (146957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50373 states to 50373 states and 146957 transitions. [2021-04-15 05:15:42,351 INFO L78 Accepts]: Start accepts. Automaton has 50373 states and 146957 transitions. Word has length 40 [2021-04-15 05:15:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:42,351 INFO L480 AbstractCegarLoop]: Abstraction has 50373 states and 146957 transitions. [2021-04-15 05:15:42,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:15:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 50373 states and 146957 transitions. [2021-04-15 05:15:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:42,417 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:42,417 INFO L551 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] [2021-04-15 05:15:42,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-04-15 05:15:42,618 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -711983976, now seen corresponding path program 115 times [2021-04-15 05:15:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:42,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751658254] [2021-04-15 05:15:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:15:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751658254] [2021-04-15 05:15:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502640771] [2021-04-15 05:15:42,761 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:42,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:43,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:43,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-04-15 05:15:43,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570878098] [2021-04-15 05:15:43,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:15:43,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:15:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:43,072 INFO L87 Difference]: Start difference. First operand 50373 states and 146957 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2021-04-15 05:15:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:43,610 INFO L93 Difference]: Finished difference Result 51649 states and 150512 transitions. [2021-04-15 05:15:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:15:43,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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 40 [2021-04-15 05:15:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:43,728 INFO L225 Difference]: With dead ends: 51649 [2021-04-15 05:15:43,729 INFO L226 Difference]: Without dead ends: 51573 [2021-04-15 05:15:43,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:15:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51573 states. [2021-04-15 05:15:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51573 to 51249. [2021-04-15 05:15:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51249 states, 51248 states have (on average 2.919313924445832) internal successors, (149609), 51248 states have internal predecessors, (149609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51249 states to 51249 states and 149609 transitions. [2021-04-15 05:15:44,924 INFO L78 Accepts]: Start accepts. Automaton has 51249 states and 149609 transitions. Word has length 40 [2021-04-15 05:15:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:44,924 INFO L480 AbstractCegarLoop]: Abstraction has 51249 states and 149609 transitions. [2021-04-15 05:15:44,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2021-04-15 05:15:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 51249 states and 149609 transitions. [2021-04-15 05:15:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:44,990 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:44,990 INFO L551 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] [2021-04-15 05:15:45,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 05:15:45,191 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash 748763352, now seen corresponding path program 116 times [2021-04-15 05:15:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:45,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994390364] [2021-04-15 05:15:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994390364] [2021-04-15 05:15:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098497045] [2021-04-15 05:15:45,346 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:45,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:15:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:45,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:45,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-04-15 05:15:45,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75266812] [2021-04-15 05:15:45,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:15:45,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:15:45,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:15:45,876 INFO L87 Difference]: Start difference. First operand 51249 states and 149609 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-04-15 05:15:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:46,349 INFO L93 Difference]: Finished difference Result 51693 states and 150595 transitions. [2021-04-15 05:15:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:15:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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 40 [2021-04-15 05:15:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:46,448 INFO L225 Difference]: With dead ends: 51693 [2021-04-15 05:15:46,448 INFO L226 Difference]: Without dead ends: 51617 [2021-04-15 05:15:46,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:15:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51617 states. [2021-04-15 05:15:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51617 to 51243. [2021-04-15 05:15:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51243 states, 51242 states have (on average 2.9193630225205887) internal successors, (149594), 51242 states have internal predecessors, (149594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51243 states to 51243 states and 149594 transitions. [2021-04-15 05:15:47,496 INFO L78 Accepts]: Start accepts. Automaton has 51243 states and 149594 transitions. Word has length 40 [2021-04-15 05:15:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:47,496 INFO L480 AbstractCegarLoop]: Abstraction has 51243 states and 149594 transitions. [2021-04-15 05:15:47,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-04-15 05:15:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 51243 states and 149594 transitions. [2021-04-15 05:15:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:47,566 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:47,566 INFO L551 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] [2021-04-15 05:15:47,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-04-15 05:15:47,766 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:47,767 INFO L82 PathProgramCache]: Analyzing trace with hash -960067266, now seen corresponding path program 117 times [2021-04-15 05:15:47,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:47,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267045072] [2021-04-15 05:15:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267045072] [2021-04-15 05:15:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171246329] [2021-04-15 05:15:47,919 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:47,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:15:47,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:47,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:48,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:48,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-04-15 05:15:48,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817112966] [2021-04-15 05:15:48,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:15:48,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:48,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:15:48,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:15:48,218 INFO L87 Difference]: Start difference. First operand 51243 states and 149594 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:48,645 INFO L93 Difference]: Finished difference Result 60565 states and 176710 transitions. [2021-04-15 05:15:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:15:48,646 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:48,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:48,750 INFO L225 Difference]: With dead ends: 60565 [2021-04-15 05:15:48,750 INFO L226 Difference]: Without dead ends: 60463 [2021-04-15 05:15:48,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:15:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60463 states. [2021-04-15 05:15:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60463 to 60079. [2021-04-15 05:15:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60079 states, 60078 states have (on average 2.9229002297013884) internal successors, (175602), 60078 states have internal predecessors, (175602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60079 states to 60079 states and 175602 transitions. [2021-04-15 05:15:50,440 INFO L78 Accepts]: Start accepts. Automaton has 60079 states and 175602 transitions. Word has length 40 [2021-04-15 05:15:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:50,440 INFO L480 AbstractCegarLoop]: Abstraction has 60079 states and 175602 transitions. [2021-04-15 05:15:50,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60079 states and 175602 transitions. [2021-04-15 05:15:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:50,541 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:50,541 INFO L551 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] [2021-04-15 05:15:50,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-04-15 05:15:50,742 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash -988176450, now seen corresponding path program 118 times [2021-04-15 05:15:50,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:50,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967304110] [2021-04-15 05:15:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967304110] [2021-04-15 05:15:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123309456] [2021-04-15 05:15:50,826 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:50,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:15:50,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:50,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:51,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:51,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-04-15 05:15:51,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522385172] [2021-04-15 05:15:51,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:51,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:51,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:51,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:51,088 INFO L87 Difference]: Start difference. First operand 60079 states and 175602 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:51,517 INFO L93 Difference]: Finished difference Result 60715 states and 177258 transitions. [2021-04-15 05:15:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:15:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:51,637 INFO L225 Difference]: With dead ends: 60715 [2021-04-15 05:15:51,637 INFO L226 Difference]: Without dead ends: 60599 [2021-04-15 05:15:51,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:15:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60599 states. [2021-04-15 05:15:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60599 to 60005. [2021-04-15 05:15:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60005 states, 60004 states have (on average 2.921755216318912) internal successors, (175317), 60004 states have internal predecessors, (175317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60005 states to 60005 states and 175317 transitions. [2021-04-15 05:15:52,846 INFO L78 Accepts]: Start accepts. Automaton has 60005 states and 175317 transitions. Word has length 40 [2021-04-15 05:15:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:52,846 INFO L480 AbstractCegarLoop]: Abstraction has 60005 states and 175317 transitions. [2021-04-15 05:15:52,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 60005 states and 175317 transitions. [2021-04-15 05:15:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:52,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:52,928 INFO L551 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] [2021-04-15 05:15:53,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:53,129 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:53,129 INFO L82 PathProgramCache]: Analyzing trace with hash -851969850, now seen corresponding path program 119 times [2021-04-15 05:15:53,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:53,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794385028] [2021-04-15 05:15:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:53,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794385028] [2021-04-15 05:15:53,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691800616] [2021-04-15 05:15:53,245 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:53,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:15:53,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:53,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:15:53,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:53,709 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:15:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:53,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-04-15 05:15:53,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063366232] [2021-04-15 05:15:53,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:15:53,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:15:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:15:53,754 INFO L87 Difference]: Start difference. First operand 60005 states and 175317 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:54,199 INFO L93 Difference]: Finished difference Result 64034 states and 186859 transitions. [2021-04-15 05:15:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:15:54,200 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:54,313 INFO L225 Difference]: With dead ends: 64034 [2021-04-15 05:15:54,313 INFO L226 Difference]: Without dead ends: 63910 [2021-04-15 05:15:54,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:15:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63910 states. [2021-04-15 05:15:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63910 to 63433. [2021-04-15 05:15:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63433 states, 63432 states have (on average 2.9227046285786353) internal successors, (185393), 63432 states have internal predecessors, (185393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63433 states to 63433 states and 185393 transitions. [2021-04-15 05:15:55,647 INFO L78 Accepts]: Start accepts. Automaton has 63433 states and 185393 transitions. Word has length 40 [2021-04-15 05:15:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:55,647 INFO L480 AbstractCegarLoop]: Abstraction has 63433 states and 185393 transitions. [2021-04-15 05:15:55,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63433 states and 185393 transitions. [2021-04-15 05:15:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:55,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:55,734 INFO L551 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] [2021-04-15 05:15:55,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:55,934 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:55,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2140494270, now seen corresponding path program 120 times [2021-04-15 05:15:55,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:55,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825952210] [2021-04-15 05:15:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:15:56,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825952210] [2021-04-15 05:15:56,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792342520] [2021-04-15 05:15:56,041 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:56,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:15:56,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:56,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:56,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-04-15 05:15:56,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217119718] [2021-04-15 05:15:56,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:15:56,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:15:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:56,333 INFO L87 Difference]: Start difference. First operand 63433 states and 185393 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:57,102 INFO L93 Difference]: Finished difference Result 67042 states and 195864 transitions. [2021-04-15 05:15:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:15:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:57,216 INFO L225 Difference]: With dead ends: 67042 [2021-04-15 05:15:57,217 INFO L226 Difference]: Without dead ends: 66911 [2021-04-15 05:15:57,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:15:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66911 states. [2021-04-15 05:15:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66911 to 66459. [2021-04-15 05:15:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66459 states, 66458 states have (on average 2.925546961991032) internal successors, (194426), 66458 states have internal predecessors, (194426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66459 states to 66459 states and 194426 transitions. [2021-04-15 05:15:58,536 INFO L78 Accepts]: Start accepts. Automaton has 66459 states and 194426 transitions. Word has length 40 [2021-04-15 05:15:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:58,537 INFO L480 AbstractCegarLoop]: Abstraction has 66459 states and 194426 transitions. [2021-04-15 05:15:58,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 66459 states and 194426 transitions. [2021-04-15 05:15:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:15:58,626 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:58,626 INFO L551 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] [2021-04-15 05:15:58,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:58,826 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1155037826, now seen corresponding path program 121 times [2021-04-15 05:15:58,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:58,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570078909] [2021-04-15 05:15:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570078909] [2021-04-15 05:15:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198405775] [2021-04-15 05:15:58,953 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:58,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:59,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:59,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-04-15 05:15:59,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125024225] [2021-04-15 05:15:59,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:15:59,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:15:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:15:59,228 INFO L87 Difference]: Start difference. First operand 66459 states and 194426 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:59,839 INFO L93 Difference]: Finished difference Result 67030 states and 195723 transitions. [2021-04-15 05:15:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:15:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:15:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:00,307 INFO L225 Difference]: With dead ends: 67030 [2021-04-15 05:16:00,308 INFO L226 Difference]: Without dead ends: 66900 [2021-04-15 05:16:00,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:16:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66900 states. [2021-04-15 05:16:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66900 to 66443. [2021-04-15 05:16:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66443 states, 66442 states have (on average 2.925589235724391) internal successors, (194382), 66442 states have internal predecessors, (194382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66443 states to 66443 states and 194382 transitions. [2021-04-15 05:16:01,694 INFO L78 Accepts]: Start accepts. Automaton has 66443 states and 194382 transitions. Word has length 40 [2021-04-15 05:16:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:01,694 INFO L480 AbstractCegarLoop]: Abstraction has 66443 states and 194382 transitions. [2021-04-15 05:16:01,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 66443 states and 194382 transitions. [2021-04-15 05:16:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:01,789 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:01,789 INFO L551 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] [2021-04-15 05:16:01,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-04-15 05:16:01,991 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2930118, now seen corresponding path program 122 times [2021-04-15 05:16:01,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:01,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393151058] [2021-04-15 05:16:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:16:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393151058] [2021-04-15 05:16:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381247935] [2021-04-15 05:16:02,117 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:02,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:02,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:02,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:02,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:02,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-04-15 05:16:02,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557341344] [2021-04-15 05:16:02,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:16:02,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:02,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:16:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:16:02,416 INFO L87 Difference]: Start difference. First operand 66443 states and 194382 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:02,834 INFO L93 Difference]: Finished difference Result 68535 states and 200372 transitions. [2021-04-15 05:16:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:16:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:02,953 INFO L225 Difference]: With dead ends: 68535 [2021-04-15 05:16:02,953 INFO L226 Difference]: Without dead ends: 68411 [2021-04-15 05:16:02,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:16:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68411 states. [2021-04-15 05:16:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68411 to 68001. [2021-04-15 05:16:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68001 states, 68000 states have (on average 2.927691176470588) internal successors, (199083), 68000 states have internal predecessors, (199083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68001 states to 68001 states and 199083 transitions. [2021-04-15 05:16:04,714 INFO L78 Accepts]: Start accepts. Automaton has 68001 states and 199083 transitions. Word has length 40 [2021-04-15 05:16:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:04,714 INFO L480 AbstractCegarLoop]: Abstraction has 68001 states and 199083 transitions. [2021-04-15 05:16:04,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 68001 states and 199083 transitions. [2021-04-15 05:16:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:04,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:04,807 INFO L551 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] [2021-04-15 05:16:05,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:05,008 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:05,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1002365318, now seen corresponding path program 123 times [2021-04-15 05:16:05,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:05,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930015254] [2021-04-15 05:16:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:16:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930015254] [2021-04-15 05:16:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263861334] [2021-04-15 05:16:05,150 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:05,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:16:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:05,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:05,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-04-15 05:16:05,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799865152] [2021-04-15 05:16:05,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:16:05,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:05,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:16:05,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:16:05,439 INFO L87 Difference]: Start difference. First operand 68001 states and 199083 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:05,980 INFO L93 Difference]: Finished difference Result 68536 states and 200289 transitions. [2021-04-15 05:16:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:16:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:06,106 INFO L225 Difference]: With dead ends: 68536 [2021-04-15 05:16:06,106 INFO L226 Difference]: Without dead ends: 68406 [2021-04-15 05:16:06,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:16:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68406 states. [2021-04-15 05:16:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68406 to 67985. [2021-04-15 05:16:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67985 states, 67984 states have (on average 2.9277329959990586) internal successors, (199039), 67984 states have internal predecessors, (199039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67985 states to 67985 states and 199039 transitions. [2021-04-15 05:16:07,910 INFO L78 Accepts]: Start accepts. Automaton has 67985 states and 199039 transitions. Word has length 40 [2021-04-15 05:16:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:07,910 INFO L480 AbstractCegarLoop]: Abstraction has 67985 states and 199039 transitions. [2021-04-15 05:16:07,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 67985 states and 199039 transitions. [2021-04-15 05:16:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:08,016 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:08,016 INFO L551 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] [2021-04-15 05:16:08,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-04-15 05:16:08,217 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1831854650, now seen corresponding path program 124 times [2021-04-15 05:16:08,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:08,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109091418] [2021-04-15 05:16:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:08,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109091418] [2021-04-15 05:16:08,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152804477] [2021-04-15 05:16:08,381 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:08,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:08,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:08,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:08,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-04-15 05:16:08,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244433831] [2021-04-15 05:16:08,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:16:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:16:08,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:16:08,711 INFO L87 Difference]: Start difference. First operand 67985 states and 199039 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:09,376 INFO L93 Difference]: Finished difference Result 68495 states and 200183 transitions. [2021-04-15 05:16:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:16:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:09,509 INFO L225 Difference]: With dead ends: 68495 [2021-04-15 05:16:09,509 INFO L226 Difference]: Without dead ends: 68419 [2021-04-15 05:16:09,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:16:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68419 states. [2021-04-15 05:16:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68419 to 67979. [2021-04-15 05:16:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67979 states, 67978 states have (on average 2.927770749360087) internal successors, (199024), 67978 states have internal predecessors, (199024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67979 states to 67979 states and 199024 transitions. [2021-04-15 05:16:10,878 INFO L78 Accepts]: Start accepts. Automaton has 67979 states and 199024 transitions. Word has length 40 [2021-04-15 05:16:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:10,878 INFO L480 AbstractCegarLoop]: Abstraction has 67979 states and 199024 transitions. [2021-04-15 05:16:10,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 67979 states and 199024 transitions. [2021-04-15 05:16:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:11,259 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:11,260 INFO L551 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] [2021-04-15 05:16:11,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:11,481 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1497503238, now seen corresponding path program 125 times [2021-04-15 05:16:11,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:11,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32749603] [2021-04-15 05:16:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:11,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32749603] [2021-04-15 05:16:11,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868964203] [2021-04-15 05:16:11,641 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:11,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:16:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:11,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:16:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:11,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:11,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-04-15 05:16:11,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393809277] [2021-04-15 05:16:11,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:16:11,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:11,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:16:11,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:16:11,821 INFO L87 Difference]: Start difference. First operand 67979 states and 199024 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:12,309 INFO L93 Difference]: Finished difference Result 90722 states and 265525 transitions. [2021-04-15 05:16:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:16:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:12,492 INFO L225 Difference]: With dead ends: 90722 [2021-04-15 05:16:12,492 INFO L226 Difference]: Without dead ends: 90685 [2021-04-15 05:16:12,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90685 states. [2021-04-15 05:16:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90685 to 67987. [2021-04-15 05:16:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67987 states, 67986 states have (on average 2.9277204130262113) internal successors, (199044), 67986 states have internal predecessors, (199044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67987 states to 67987 states and 199044 transitions. [2021-04-15 05:16:14,019 INFO L78 Accepts]: Start accepts. Automaton has 67987 states and 199044 transitions. Word has length 40 [2021-04-15 05:16:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:14,019 INFO L480 AbstractCegarLoop]: Abstraction has 67987 states and 199044 transitions. [2021-04-15 05:16:14,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 67987 states and 199044 transitions. [2021-04-15 05:16:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:14,380 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:14,380 INFO L551 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] [2021-04-15 05:16:14,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:14,603 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash -627011198, now seen corresponding path program 126 times [2021-04-15 05:16:14,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:14,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166685926] [2021-04-15 05:16:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:14,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166685926] [2021-04-15 05:16:14,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467159111] [2021-04-15 05:16:14,802 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:14,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:16:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:15,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:15,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-04-15 05:16:15,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539642689] [2021-04-15 05:16:15,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:15,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:15,088 INFO L87 Difference]: Start difference. First operand 67987 states and 199044 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:15,630 INFO L93 Difference]: Finished difference Result 90666 states and 265433 transitions. [2021-04-15 05:16:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:16:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:15,793 INFO L225 Difference]: With dead ends: 90666 [2021-04-15 05:16:15,793 INFO L226 Difference]: Without dead ends: 90629 [2021-04-15 05:16:15,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:16:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90629 states. [2021-04-15 05:16:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90629 to 68009. [2021-04-15 05:16:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68009 states, 68008 states have (on average 2.9277290906952125) internal successors, (199109), 68008 states have internal predecessors, (199109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68009 states to 68009 states and 199109 transitions. [2021-04-15 05:16:17,289 INFO L78 Accepts]: Start accepts. Automaton has 68009 states and 199109 transitions. Word has length 40 [2021-04-15 05:16:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:17,289 INFO L480 AbstractCegarLoop]: Abstraction has 68009 states and 199109 transitions. [2021-04-15 05:16:17,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 68009 states and 199109 transitions. [2021-04-15 05:16:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:17,395 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:17,395 INFO L551 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] [2021-04-15 05:16:17,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:17,595 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:17,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2073309766, now seen corresponding path program 127 times [2021-04-15 05:16:17,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:17,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032500397] [2021-04-15 05:16:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032500397] [2021-04-15 05:16:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240870356] [2021-04-15 05:16:17,968 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:16:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:18,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:18,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-04-15 05:16:18,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250807042] [2021-04-15 05:16:18,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:16:18,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:16:18,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:16:18,177 INFO L87 Difference]: Start difference. First operand 68009 states and 199109 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:18,795 INFO L93 Difference]: Finished difference Result 92337 states and 270262 transitions. [2021-04-15 05:16:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:16:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:18,975 INFO L225 Difference]: With dead ends: 92337 [2021-04-15 05:16:18,975 INFO L226 Difference]: Without dead ends: 92263 [2021-04-15 05:16:18,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 504.3ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:16:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92263 states. [2021-04-15 05:16:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92263 to 69561. [2021-04-15 05:16:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69561 states, 69560 states have (on average 2.9280764807360553) internal successors, (203677), 69560 states have internal predecessors, (203677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69561 states to 69561 states and 203677 transitions. [2021-04-15 05:16:20,573 INFO L78 Accepts]: Start accepts. Automaton has 69561 states and 203677 transitions. Word has length 40 [2021-04-15 05:16:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:20,573 INFO L480 AbstractCegarLoop]: Abstraction has 69561 states and 203677 transitions. [2021-04-15 05:16:20,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 69561 states and 203677 transitions. [2021-04-15 05:16:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:21,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:21,057 INFO L551 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] [2021-04-15 05:16:21,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-04-15 05:16:21,279 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1408085314, now seen corresponding path program 128 times [2021-04-15 05:16:21,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:21,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301516685] [2021-04-15 05:16:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:21,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301516685] [2021-04-15 05:16:21,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230605403] [2021-04-15 05:16:21,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:21,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:21,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:21,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:21,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:21,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-04-15 05:16:21,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984598273] [2021-04-15 05:16:21,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:21,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:21,667 INFO L87 Difference]: Start difference. First operand 69561 states and 203677 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:22,321 INFO L93 Difference]: Finished difference Result 95343 states and 279067 transitions. [2021-04-15 05:16:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:16:22,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:22,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:22,509 INFO L225 Difference]: With dead ends: 95343 [2021-04-15 05:16:22,510 INFO L226 Difference]: Without dead ends: 95237 [2021-04-15 05:16:22,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:16:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95237 states. [2021-04-15 05:16:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95237 to 72383. [2021-04-15 05:16:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72383 states, 72382 states have (on average 2.9288773451963195) internal successors, (211998), 72382 states have internal predecessors, (211998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72383 states to 72383 states and 211998 transitions. [2021-04-15 05:16:24,483 INFO L78 Accepts]: Start accepts. Automaton has 72383 states and 211998 transitions. Word has length 40 [2021-04-15 05:16:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:24,483 INFO L480 AbstractCegarLoop]: Abstraction has 72383 states and 211998 transitions. [2021-04-15 05:16:24,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72383 states and 211998 transitions. [2021-04-15 05:16:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:24,615 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:24,615 INFO L551 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] [2021-04-15 05:16:24,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-04-15 05:16:24,816 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:24,816 INFO L82 PathProgramCache]: Analyzing trace with hash -346917946, now seen corresponding path program 129 times [2021-04-15 05:16:24,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:24,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623000092] [2021-04-15 05:16:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:24,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623000092] [2021-04-15 05:16:24,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234472778] [2021-04-15 05:16:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:24,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:16:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:24,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:25,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:25,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-04-15 05:16:25,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619196527] [2021-04-15 05:16:25,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:25,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:25,178 INFO L87 Difference]: Start difference. First operand 72383 states and 211998 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:25,979 INFO L93 Difference]: Finished difference Result 99635 states and 291873 transitions. [2021-04-15 05:16:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:16:25,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:26,180 INFO L225 Difference]: With dead ends: 99635 [2021-04-15 05:16:26,180 INFO L226 Difference]: Without dead ends: 99545 [2021-04-15 05:16:26,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:16:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99545 states. [2021-04-15 05:16:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99545 to 76561. [2021-04-15 05:16:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76561 states, 76560 states have (on average 2.9320402298850574) internal successors, (224477), 76560 states have internal predecessors, (224477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76561 states to 76561 states and 224477 transitions. [2021-04-15 05:16:28,209 INFO L78 Accepts]: Start accepts. Automaton has 76561 states and 224477 transitions. Word has length 40 [2021-04-15 05:16:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:28,210 INFO L480 AbstractCegarLoop]: Abstraction has 76561 states and 224477 transitions. [2021-04-15 05:16:28,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 76561 states and 224477 transitions. [2021-04-15 05:16:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:28,310 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:28,310 INFO L551 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] [2021-04-15 05:16:28,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-04-15 05:16:28,511 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:28,511 INFO L82 PathProgramCache]: Analyzing trace with hash -466000958, now seen corresponding path program 130 times [2021-04-15 05:16:28,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:28,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554465419] [2021-04-15 05:16:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:28,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554465419] [2021-04-15 05:16:28,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892642128] [2021-04-15 05:16:28,645 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:28,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:28,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:28,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:28,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-04-15 05:16:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432555426] [2021-04-15 05:16:28,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:28,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:28,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:28,878 INFO L87 Difference]: Start difference. First operand 76561 states and 224477 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:29,729 INFO L93 Difference]: Finished difference Result 99676 states and 291945 transitions. [2021-04-15 05:16:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:16:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:29,950 INFO L225 Difference]: With dead ends: 99676 [2021-04-15 05:16:29,950 INFO L226 Difference]: Without dead ends: 99566 [2021-04-15 05:16:29,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:16:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99566 states. [2021-04-15 05:16:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99566 to 73179. [2021-04-15 05:16:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73179 states, 73178 states have (on average 2.929186367487496) internal successors, (214352), 73178 states have internal predecessors, (214352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73179 states to 73179 states and 214352 transitions. [2021-04-15 05:16:31,988 INFO L78 Accepts]: Start accepts. Automaton has 73179 states and 214352 transitions. Word has length 40 [2021-04-15 05:16:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:31,988 INFO L480 AbstractCegarLoop]: Abstraction has 73179 states and 214352 transitions. [2021-04-15 05:16:31,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 73179 states and 214352 transitions. [2021-04-15 05:16:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:32,096 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:32,096 INFO L551 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] [2021-04-15 05:16:32,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:32,297 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2017252144, now seen corresponding path program 131 times [2021-04-15 05:16:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:32,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795856912] [2021-04-15 05:16:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:32,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795856912] [2021-04-15 05:16:32,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125812190] [2021-04-15 05:16:32,455 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:32,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:16:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:32,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:16:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:32,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:32,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-04-15 05:16:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599778039] [2021-04-15 05:16:32,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:32,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:32,690 INFO L87 Difference]: Start difference. First operand 73179 states and 214352 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:33,237 INFO L93 Difference]: Finished difference Result 78341 states and 228550 transitions. [2021-04-15 05:16:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:16:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:16:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:33,412 INFO L225 Difference]: With dead ends: 78341 [2021-04-15 05:16:33,412 INFO L226 Difference]: Without dead ends: 78267 [2021-04-15 05:16:33,412 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:16:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78267 states. [2021-04-15 05:16:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78267 to 74429. [2021-04-15 05:16:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74429 states, 74428 states have (on average 2.929824797119364) internal successors, (218061), 74428 states have internal predecessors, (218061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74429 states to 74429 states and 218061 transitions. [2021-04-15 05:16:35,462 INFO L78 Accepts]: Start accepts. Automaton has 74429 states and 218061 transitions. Word has length 40 [2021-04-15 05:16:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:35,462 INFO L480 AbstractCegarLoop]: Abstraction has 74429 states and 218061 transitions. [2021-04-15 05:16:35,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 74429 states and 218061 transitions. [2021-04-15 05:16:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:35,586 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:35,586 INFO L551 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] [2021-04-15 05:16:35,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-04-15 05:16:35,787 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:35,787 INFO L82 PathProgramCache]: Analyzing trace with hash -727268640, now seen corresponding path program 132 times [2021-04-15 05:16:35,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:35,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366422545] [2021-04-15 05:16:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:35,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366422545] [2021-04-15 05:16:35,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291112416] [2021-04-15 05:16:35,918 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:35,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:16:35,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:35,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:36,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:36,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-04-15 05:16:36,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196805542] [2021-04-15 05:16:36,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:36,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:36,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:36,175 INFO L87 Difference]: Start difference. First operand 74429 states and 218061 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:36,733 INFO L93 Difference]: Finished difference Result 79441 states and 231842 transitions. [2021-04-15 05:16:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:16:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:16:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:36,877 INFO L225 Difference]: With dead ends: 79441 [2021-04-15 05:16:36,877 INFO L226 Difference]: Without dead ends: 79367 [2021-04-15 05:16:36,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:16:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79367 states. [2021-04-15 05:16:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79367 to 74331. [2021-04-15 05:16:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74331 states, 74330 states have (on average 2.9302569621956143) internal successors, (217806), 74330 states have internal predecessors, (217806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74331 states to 74331 states and 217806 transitions. [2021-04-15 05:16:38,874 INFO L78 Accepts]: Start accepts. Automaton has 74331 states and 217806 transitions. Word has length 40 [2021-04-15 05:16:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:38,874 INFO L480 AbstractCegarLoop]: Abstraction has 74331 states and 217806 transitions. [2021-04-15 05:16:38,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 74331 states and 217806 transitions. [2021-04-15 05:16:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:38,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:38,981 INFO L551 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] [2021-04-15 05:16:39,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-04-15 05:16:39,181 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1155007878, now seen corresponding path program 133 times [2021-04-15 05:16:39,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:39,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409085260] [2021-04-15 05:16:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:39,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409085260] [2021-04-15 05:16:39,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311476489] [2021-04-15 05:16:39,299 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:39,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:39,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:39,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-04-15 05:16:39,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647524371] [2021-04-15 05:16:39,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:39,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:39,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:39,541 INFO L87 Difference]: Start difference. First operand 74331 states and 217806 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:40,180 INFO L93 Difference]: Finished difference Result 80935 states and 236245 transitions. [2021-04-15 05:16:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:16:40,181 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:16:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:40,341 INFO L225 Difference]: With dead ends: 80935 [2021-04-15 05:16:40,341 INFO L226 Difference]: Without dead ends: 80821 [2021-04-15 05:16:40,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:16:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80821 states. [2021-04-15 05:16:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80821 to 76503. [2021-04-15 05:16:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76503 states, 76502 states have (on average 2.931269770724948) internal successors, (224248), 76502 states have internal predecessors, (224248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76503 states to 76503 states and 224248 transitions. [2021-04-15 05:16:42,447 INFO L78 Accepts]: Start accepts. Automaton has 76503 states and 224248 transitions. Word has length 40 [2021-04-15 05:16:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:42,447 INFO L480 AbstractCegarLoop]: Abstraction has 76503 states and 224248 transitions. [2021-04-15 05:16:42,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 76503 states and 224248 transitions. [2021-04-15 05:16:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:42,554 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:42,554 INFO L551 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] [2021-04-15 05:16:42,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-04-15 05:16:42,755 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash -862357216, now seen corresponding path program 134 times [2021-04-15 05:16:42,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:42,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428878079] [2021-04-15 05:16:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:42,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428878079] [2021-04-15 05:16:42,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390573371] [2021-04-15 05:16:42,874 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:42,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:42,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:42,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:43,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:43,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-04-15 05:16:43,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62640438] [2021-04-15 05:16:43,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:43,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:43,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:43,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:43,129 INFO L87 Difference]: Start difference. First operand 76503 states and 224248 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:43,804 INFO L93 Difference]: Finished difference Result 85572 states and 250216 transitions. [2021-04-15 05:16:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:16:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:16:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:43,963 INFO L225 Difference]: With dead ends: 85572 [2021-04-15 05:16:43,963 INFO L226 Difference]: Without dead ends: 85482 [2021-04-15 05:16:43,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:16:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85482 states. [2021-04-15 05:16:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85482 to 80465. [2021-04-15 05:16:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80465 states, 80464 states have (on average 2.9361577848478824) internal successors, (236255), 80464 states have internal predecessors, (236255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80465 states to 80465 states and 236255 transitions. [2021-04-15 05:16:46,217 INFO L78 Accepts]: Start accepts. Automaton has 80465 states and 236255 transitions. Word has length 40 [2021-04-15 05:16:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:46,217 INFO L480 AbstractCegarLoop]: Abstraction has 80465 states and 236255 transitions. [2021-04-15 05:16:46,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 80465 states and 236255 transitions. [2021-04-15 05:16:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:46,388 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:46,388 INFO L551 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] [2021-04-15 05:16:46,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-04-15 05:16:46,605 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash -981440228, now seen corresponding path program 135 times [2021-04-15 05:16:46,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:46,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888134674] [2021-04-15 05:16:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:16:46,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888134674] [2021-04-15 05:16:46,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271251755] [2021-04-15 05:16:46,764 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:46,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:16:46,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:16:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:47,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:47,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-04-15 05:16:47,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055994810] [2021-04-15 05:16:47,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:16:47,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:47,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:16:47,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:16:47,041 INFO L87 Difference]: Start difference. First operand 80465 states and 236255 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:47,762 INFO L93 Difference]: Finished difference Result 85569 states and 250197 transitions. [2021-04-15 05:16:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:16:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:16:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:47,920 INFO L225 Difference]: With dead ends: 85569 [2021-04-15 05:16:47,920 INFO L226 Difference]: Without dead ends: 85453 [2021-04-15 05:16:47,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:16:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85453 states. [2021-04-15 05:16:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85453 to 80371. [2021-04-15 05:16:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80371 states, 80370 states have (on average 2.934801542864253) internal successors, (235870), 80370 states have internal predecessors, (235870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80371 states to 80371 states and 235870 transitions. [2021-04-15 05:16:49,941 INFO L78 Accepts]: Start accepts. Automaton has 80371 states and 235870 transitions. Word has length 40 [2021-04-15 05:16:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:49,942 INFO L480 AbstractCegarLoop]: Abstraction has 80371 states and 235870 transitions. [2021-04-15 05:16:49,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 80371 states and 235870 transitions. [2021-04-15 05:16:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:50,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:50,057 INFO L551 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] [2021-04-15 05:16:50,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-04-15 05:16:50,257 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash -837152646, now seen corresponding path program 136 times [2021-04-15 05:16:50,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:50,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501871938] [2021-04-15 05:16:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501871938] [2021-04-15 05:16:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321089969] [2021-04-15 05:16:50,394 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:50,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:50,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:16:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:50,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:50,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-04-15 05:16:50,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781274742] [2021-04-15 05:16:50,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:50,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:50,630 INFO L87 Difference]: Start difference. First operand 80371 states and 235870 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:51,332 INFO L93 Difference]: Finished difference Result 84520 states and 246996 transitions. [2021-04-15 05:16:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:16:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 40 [2021-04-15 05:16:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:51,506 INFO L225 Difference]: With dead ends: 84520 [2021-04-15 05:16:51,506 INFO L226 Difference]: Without dead ends: 84396 [2021-04-15 05:16:51,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:16:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84396 states. [2021-04-15 05:16:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84396 to 77497. [2021-04-15 05:16:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77497 states, 77496 states have (on average 2.9343579023433466) internal successors, (227401), 77496 states have internal predecessors, (227401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77497 states to 77497 states and 227401 transitions. [2021-04-15 05:16:53,483 INFO L78 Accepts]: Start accepts. Automaton has 77497 states and 227401 transitions. Word has length 40 [2021-04-15 05:16:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:53,483 INFO L480 AbstractCegarLoop]: Abstraction has 77497 states and 227401 transitions. [2021-04-15 05:16:53,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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) [2021-04-15 05:16:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 77497 states and 227401 transitions. [2021-04-15 05:16:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:53,609 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:53,609 INFO L551 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] [2021-04-15 05:16:53,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:53,810 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:53,810 INFO L82 PathProgramCache]: Analyzing trace with hash 762977632, now seen corresponding path program 137 times [2021-04-15 05:16:53,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:53,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014267215] [2021-04-15 05:16:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:53,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014267215] [2021-04-15 05:16:53,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681190868] [2021-04-15 05:16:53,962 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:53,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:16:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:53,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:16:53,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-04-15 05:16:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583583571] [2021-04-15 05:16:54,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:16:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:16:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:16:54,221 INFO L87 Difference]: Start difference. First operand 77497 states and 227401 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:16:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:54,796 INFO L93 Difference]: Finished difference Result 81159 states and 237937 transitions. [2021-04-15 05:16:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:16:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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 40 [2021-04-15 05:16:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:54,946 INFO L225 Difference]: With dead ends: 81159 [2021-04-15 05:16:54,946 INFO L226 Difference]: Without dead ends: 81085 [2021-04-15 05:16:54,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:16:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81085 states. [2021-04-15 05:16:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81085 to 80725. [2021-04-15 05:16:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80725 states, 80724 states have (on average 2.935471483078143) internal successors, (236963), 80724 states have internal predecessors, (236963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80725 states to 80725 states and 236963 transitions. [2021-04-15 05:16:56,946 INFO L78 Accepts]: Start accepts. Automaton has 80725 states and 236963 transitions. Word has length 40 [2021-04-15 05:16:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:56,946 INFO L480 AbstractCegarLoop]: Abstraction has 80725 states and 236963 transitions. [2021-04-15 05:16:56,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:16:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 80725 states and 236963 transitions. [2021-04-15 05:16:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:16:57,060 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:57,060 INFO L551 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] [2021-04-15 05:16:57,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-04-15 05:16:57,260 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:57,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1088400518, now seen corresponding path program 138 times [2021-04-15 05:16:57,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:57,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630078888] [2021-04-15 05:16:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:57,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630078888] [2021-04-15 05:16:57,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205784480] [2021-04-15 05:16:57,402 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:57,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:16:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:16:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:57,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:57,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-04-15 05:16:57,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221271190] [2021-04-15 05:16:57,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:16:57,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:16:57,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:16:57,676 INFO L87 Difference]: Start difference. First operand 80725 states and 236963 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:16:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:58,207 INFO L93 Difference]: Finished difference Result 82885 states and 243040 transitions. [2021-04-15 05:16:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:16:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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 40 [2021-04-15 05:16:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:58,356 INFO L225 Difference]: With dead ends: 82885 [2021-04-15 05:16:58,356 INFO L226 Difference]: Without dead ends: 82811 [2021-04-15 05:16:58,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:16:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82811 states. [2021-04-15 05:17:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82811 to 79693. [2021-04-15 05:17:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79693 states, 79692 states have (on average 2.936693771018421) internal successors, (234031), 79692 states have internal predecessors, (234031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79693 states to 79693 states and 234031 transitions. [2021-04-15 05:17:00,347 INFO L78 Accepts]: Start accepts. Automaton has 79693 states and 234031 transitions. Word has length 40 [2021-04-15 05:17:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:00,347 INFO L480 AbstractCegarLoop]: Abstraction has 79693 states and 234031 transitions. [2021-04-15 05:17:00,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:17:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 79693 states and 234031 transitions. [2021-04-15 05:17:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:00,453 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:00,453 INFO L551 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] [2021-04-15 05:17:00,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-04-15 05:17:00,653 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:00,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1493177376, now seen corresponding path program 139 times [2021-04-15 05:17:00,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:00,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694087948] [2021-04-15 05:17:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694087948] [2021-04-15 05:17:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349984525] [2021-04-15 05:17:00,791 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:00,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:01,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:01,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-04-15 05:17:01,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278224376] [2021-04-15 05:17:01,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:17:01,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:01,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:17:01,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:17:01,057 INFO L87 Difference]: Start difference. First operand 79693 states and 234031 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:17:01,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:01,740 INFO L93 Difference]: Finished difference Result 83407 states and 244529 transitions. [2021-04-15 05:17:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:17:01,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 40 [2021-04-15 05:17:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:01,918 INFO L225 Difference]: With dead ends: 83407 [2021-04-15 05:17:01,918 INFO L226 Difference]: Without dead ends: 83293 [2021-04-15 05:17:01,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:17:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83293 states. [2021-04-15 05:17:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83293 to 79305. [2021-04-15 05:17:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79305 states, 79304 states have (on average 2.9381998385957835) internal successors, (233011), 79304 states have internal predecessors, (233011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79305 states to 79305 states and 233011 transitions. [2021-04-15 05:17:04,023 INFO L78 Accepts]: Start accepts. Automaton has 79305 states and 233011 transitions. Word has length 40 [2021-04-15 05:17:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:04,023 INFO L480 AbstractCegarLoop]: Abstraction has 79305 states and 233011 transitions. [2021-04-15 05:17:04,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:17:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 79305 states and 233011 transitions. [2021-04-15 05:17:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:04,145 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:04,145 INFO L551 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] [2021-04-15 05:17:04,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:04,346 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1063230778, now seen corresponding path program 140 times [2021-04-15 05:17:04,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:04,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110543423] [2021-04-15 05:17:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:04,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110543423] [2021-04-15 05:17:04,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120187159] [2021-04-15 05:17:04,450 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:04,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:04,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:04,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:04,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:04,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-04-15 05:17:04,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785509822] [2021-04-15 05:17:04,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:17:04,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:04,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:17:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:17:04,716 INFO L87 Difference]: Start difference. First operand 79305 states and 233011 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:17:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:05,432 INFO L93 Difference]: Finished difference Result 83755 states and 246131 transitions. [2021-04-15 05:17:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:17:05,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 40 [2021-04-15 05:17:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:05,598 INFO L225 Difference]: With dead ends: 83755 [2021-04-15 05:17:05,598 INFO L226 Difference]: Without dead ends: 83665 [2021-04-15 05:17:05,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:17:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83665 states. [2021-04-15 05:17:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83665 to 82559. [2021-04-15 05:17:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82559 states, 82558 states have (on average 2.9423677899173915) internal successors, (242916), 82558 states have internal predecessors, (242916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82559 states to 82559 states and 242916 transitions. [2021-04-15 05:17:07,660 INFO L78 Accepts]: Start accepts. Automaton has 82559 states and 242916 transitions. Word has length 40 [2021-04-15 05:17:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:07,660 INFO L480 AbstractCegarLoop]: Abstraction has 82559 states and 242916 transitions. [2021-04-15 05:17:07,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-04-15 05:17:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 82559 states and 242916 transitions. [2021-04-15 05:17:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:07,779 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:07,779 INFO L551 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] [2021-04-15 05:17:07,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-04-15 05:17:07,981 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1182313790, now seen corresponding path program 141 times [2021-04-15 05:17:07,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:07,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240949124] [2021-04-15 05:17:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:08,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240949124] [2021-04-15 05:17:08,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731977096] [2021-04-15 05:17:08,086 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:08,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:17:08,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:08,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:08,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-04-15 05:17:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10421625] [2021-04-15 05:17:08,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:17:08,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:17:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:17:08,326 INFO L87 Difference]: Start difference. First operand 82559 states and 242916 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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) [2021-04-15 05:17:08,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:08,958 INFO L93 Difference]: Finished difference Result 83722 states and 246052 transitions. [2021-04-15 05:17:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:17:08,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 40 [2021-04-15 05:17:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:09,138 INFO L225 Difference]: With dead ends: 83722 [2021-04-15 05:17:09,138 INFO L226 Difference]: Without dead ends: 83606 [2021-04-15 05:17:09,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:17:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83606 states. [2021-04-15 05:17:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83606 to 82485. [2021-04-15 05:17:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82485 states, 82484 states have (on average 2.941237088405024) internal successors, (242605), 82484 states have internal predecessors, (242605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82485 states to 82485 states and 242605 transitions. [2021-04-15 05:17:11,224 INFO L78 Accepts]: Start accepts. Automaton has 82485 states and 242605 transitions. Word has length 40 [2021-04-15 05:17:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:11,224 INFO L480 AbstractCegarLoop]: Abstraction has 82485 states and 242605 transitions. [2021-04-15 05:17:11,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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) [2021-04-15 05:17:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 82485 states and 242605 transitions. [2021-04-15 05:17:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:11,362 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:11,362 INFO L551 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] [2021-04-15 05:17:11,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:11,563 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:11,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1038026208, now seen corresponding path program 142 times [2021-04-15 05:17:11,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:11,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088101408] [2021-04-15 05:17:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:11,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088101408] [2021-04-15 05:17:11,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678005549] [2021-04-15 05:17:11,681 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:11,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:17:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:11,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:11,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:11,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-04-15 05:17:11,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58336636] [2021-04-15 05:17:11,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:17:11,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:17:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:17:11,950 INFO L87 Difference]: Start difference. First operand 82485 states and 242605 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2021-04-15 05:17:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:12,611 INFO L93 Difference]: Finished difference Result 83267 states and 244512 transitions. [2021-04-15 05:17:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:17:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 40 [2021-04-15 05:17:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:12,766 INFO L225 Difference]: With dead ends: 83267 [2021-04-15 05:17:12,766 INFO L226 Difference]: Without dead ends: 83136 [2021-04-15 05:17:12,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:17:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83136 states. [2021-04-15 05:17:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83136 to 82471. [2021-04-15 05:17:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82471 states, 82470 states have (on average 2.9407299624105736) internal successors, (242522), 82470 states have internal predecessors, (242522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82471 states to 82471 states and 242522 transitions. [2021-04-15 05:17:14,770 INFO L78 Accepts]: Start accepts. Automaton has 82471 states and 242522 transitions. Word has length 40 [2021-04-15 05:17:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:14,771 INFO L480 AbstractCegarLoop]: Abstraction has 82471 states and 242522 transitions. [2021-04-15 05:17:14,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2021-04-15 05:17:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 82471 states and 242522 transitions. [2021-04-15 05:17:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:14,891 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:14,891 INFO L551 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] [2021-04-15 05:17:15,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:15,091 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:15,092 INFO L82 PathProgramCache]: Analyzing trace with hash -38591008, now seen corresponding path program 143 times [2021-04-15 05:17:15,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:15,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332211818] [2021-04-15 05:17:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:15,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332211818] [2021-04-15 05:17:15,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315209637] [2021-04-15 05:17:15,237 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:15,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 05:17:15,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:15,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:15,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-04-15 05:17:15,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562438245] [2021-04-15 05:17:15,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:17:15,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:17:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:17:15,498 INFO L87 Difference]: Start difference. First operand 82471 states and 242522 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:17:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:16,148 INFO L93 Difference]: Finished difference Result 83095 states and 243943 transitions. [2021-04-15 05:17:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:17:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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 40 [2021-04-15 05:17:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:16,324 INFO L225 Difference]: With dead ends: 83095 [2021-04-15 05:17:16,324 INFO L226 Difference]: Without dead ends: 82965 [2021-04-15 05:17:16,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:17:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82965 states. [2021-04-15 05:17:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82965 to 79075. [2021-04-15 05:17:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79075 states, 79074 states have (on average 2.9409413966664135) internal successors, (232552), 79074 states have internal predecessors, (232552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79075 states to 79075 states and 232552 transitions. [2021-04-15 05:17:18,268 INFO L78 Accepts]: Start accepts. Automaton has 79075 states and 232552 transitions. Word has length 40 [2021-04-15 05:17:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:18,268 INFO L480 AbstractCegarLoop]: Abstraction has 79075 states and 232552 transitions. [2021-04-15 05:17:18,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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) [2021-04-15 05:17:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 79075 states and 232552 transitions. [2021-04-15 05:17:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:18,402 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:18,402 INFO L551 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] [2021-04-15 05:17:18,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-04-15 05:17:18,603 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1856068912, now seen corresponding path program 144 times [2021-04-15 05:17:18,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:18,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364584647] [2021-04-15 05:17:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:18,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364584647] [2021-04-15 05:17:18,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691733603] [2021-04-15 05:17:18,758 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:18,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:17:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:19,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:19,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-04-15 05:17:19,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581428898] [2021-04-15 05:17:19,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:17:19,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:17:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:17:19,059 INFO L87 Difference]: Start difference. First operand 79075 states and 232552 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:19,587 INFO L93 Difference]: Finished difference Result 86717 states and 254614 transitions. [2021-04-15 05:17:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:17:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:19,746 INFO L225 Difference]: With dead ends: 86717 [2021-04-15 05:17:19,746 INFO L226 Difference]: Without dead ends: 86605 [2021-04-15 05:17:19,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:17:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86605 states. [2021-04-15 05:17:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86605 to 81813. [2021-04-15 05:17:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81813 states, 81812 states have (on average 2.9392876350657606) internal successors, (240469), 81812 states have internal predecessors, (240469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81813 states to 81813 states and 240469 transitions. [2021-04-15 05:17:21,837 INFO L78 Accepts]: Start accepts. Automaton has 81813 states and 240469 transitions. Word has length 40 [2021-04-15 05:17:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:21,837 INFO L480 AbstractCegarLoop]: Abstraction has 81813 states and 240469 transitions. [2021-04-15 05:17:21,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81813 states and 240469 transitions. [2021-04-15 05:17:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:21,966 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:21,966 INFO L551 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] [2021-04-15 05:17:22,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-04-15 05:17:22,167 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash 870160672, now seen corresponding path program 145 times [2021-04-15 05:17:22,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:22,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023464454] [2021-04-15 05:17:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:22,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023464454] [2021-04-15 05:17:22,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115686525] [2021-04-15 05:17:22,296 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:22,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:22,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:22,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-04-15 05:17:22,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498747604] [2021-04-15 05:17:22,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:17:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:17:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:17:22,579 INFO L87 Difference]: Start difference. First operand 81813 states and 240469 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:23,258 INFO L93 Difference]: Finished difference Result 87359 states and 256503 transitions. [2021-04-15 05:17:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:17:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:23,425 INFO L225 Difference]: With dead ends: 87359 [2021-04-15 05:17:23,426 INFO L226 Difference]: Without dead ends: 87227 [2021-04-15 05:17:23,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:17:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87227 states. [2021-04-15 05:17:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87227 to 79203. [2021-04-15 05:17:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79203 states, 79202 states have (on average 2.9397742481250475) internal successors, (232836), 79202 states have internal predecessors, (232836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79203 states to 79203 states and 232836 transitions. [2021-04-15 05:17:25,408 INFO L78 Accepts]: Start accepts. Automaton has 79203 states and 232836 transitions. Word has length 40 [2021-04-15 05:17:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:25,408 INFO L480 AbstractCegarLoop]: Abstraction has 79203 states and 232836 transitions. [2021-04-15 05:17:25,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 79203 states and 232836 transitions. [2021-04-15 05:17:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:25,528 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:25,528 INFO L551 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] [2021-04-15 05:17:25,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-04-15 05:17:25,729 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash -674180934, now seen corresponding path program 146 times [2021-04-15 05:17:25,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:25,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035768412] [2021-04-15 05:17:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:25,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035768412] [2021-04-15 05:17:25,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82685241] [2021-04-15 05:17:25,844 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:25,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:25,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:25,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:26,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:26,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-04-15 05:17:26,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147353195] [2021-04-15 05:17:26,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:17:26,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:26,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:17:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:17:26,131 INFO L87 Difference]: Start difference. First operand 79203 states and 232836 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:26,708 INFO L93 Difference]: Finished difference Result 81435 states and 239197 transitions. [2021-04-15 05:17:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:17:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:26,897 INFO L225 Difference]: With dead ends: 81435 [2021-04-15 05:17:26,898 INFO L226 Difference]: Without dead ends: 81321 [2021-04-15 05:17:26,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 305.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:17:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81321 states. [2021-04-15 05:17:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81321 to 72229. [2021-04-15 05:17:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72229 states, 72228 states have (on average 2.9429445644348453) internal successors, (212563), 72228 states have internal predecessors, (212563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72229 states to 72229 states and 212563 transitions. [2021-04-15 05:17:28,811 INFO L78 Accepts]: Start accepts. Automaton has 72229 states and 212563 transitions. Word has length 40 [2021-04-15 05:17:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:28,811 INFO L480 AbstractCegarLoop]: Abstraction has 72229 states and 212563 transitions. [2021-04-15 05:17:28,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 72229 states and 212563 transitions. [2021-04-15 05:17:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:28,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:28,927 INFO L551 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] [2021-04-15 05:17:29,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-04-15 05:17:29,128 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:29,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1896894304, now seen corresponding path program 147 times [2021-04-15 05:17:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:29,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681995540] [2021-04-15 05:17:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:29,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681995540] [2021-04-15 05:17:29,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632247025] [2021-04-15 05:17:29,219 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:29,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:17:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:29,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:29,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:29,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:29,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-04-15 05:17:29,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743859231] [2021-04-15 05:17:29,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:17:29,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:17:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:17:29,492 INFO L87 Difference]: Start difference. First operand 72229 states and 212563 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:30,069 INFO L93 Difference]: Finished difference Result 78667 states and 231495 transitions. [2021-04-15 05:17:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:17:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:30,223 INFO L225 Difference]: With dead ends: 78667 [2021-04-15 05:17:30,223 INFO L226 Difference]: Without dead ends: 78585 [2021-04-15 05:17:30,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:17:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78585 states. [2021-04-15 05:17:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78585 to 78067. [2021-04-15 05:17:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78067 states, 78066 states have (on average 2.9453539312889094) internal successors, (229932), 78066 states have internal predecessors, (229932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78067 states to 78067 states and 229932 transitions. [2021-04-15 05:17:32,282 INFO L78 Accepts]: Start accepts. Automaton has 78067 states and 229932 transitions. Word has length 40 [2021-04-15 05:17:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:32,282 INFO L480 AbstractCegarLoop]: Abstraction has 78067 states and 229932 transitions. [2021-04-15 05:17:32,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 78067 states and 229932 transitions. [2021-04-15 05:17:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:32,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:32,394 INFO L551 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] [2021-04-15 05:17:32,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:32,595 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:32,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1777811292, now seen corresponding path program 148 times [2021-04-15 05:17:32,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:32,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504445374] [2021-04-15 05:17:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:17:32,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504445374] [2021-04-15 05:17:32,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309319866] [2021-04-15 05:17:32,688 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:32,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:17:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:32,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:32,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:32,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-04-15 05:17:32,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985131766] [2021-04-15 05:17:32,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:17:32,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:17:32,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:17:32,972 INFO L87 Difference]: Start difference. First operand 78067 states and 229932 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:33,588 INFO L93 Difference]: Finished difference Result 78644 states and 231443 transitions. [2021-04-15 05:17:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:17:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:33,750 INFO L225 Difference]: With dead ends: 78644 [2021-04-15 05:17:33,750 INFO L226 Difference]: Without dead ends: 78532 [2021-04-15 05:17:33,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:17:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78532 states. [2021-04-15 05:17:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78532 to 76435. [2021-04-15 05:17:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76435 states, 76434 states have (on average 2.9432713190464974) internal successors, (224966), 76434 states have internal predecessors, (224966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76435 states to 76435 states and 224966 transitions. [2021-04-15 05:17:35,833 INFO L78 Accepts]: Start accepts. Automaton has 76435 states and 224966 transitions. Word has length 40 [2021-04-15 05:17:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:35,833 INFO L480 AbstractCegarLoop]: Abstraction has 76435 states and 224966 transitions. [2021-04-15 05:17:35,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 76435 states and 224966 transitions. [2021-04-15 05:17:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:35,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:35,981 INFO L551 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] [2021-04-15 05:17:36,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-04-15 05:17:36,182 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1922098874, now seen corresponding path program 149 times [2021-04-15 05:17:36,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:36,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418790034] [2021-04-15 05:17:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:36,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418790034] [2021-04-15 05:17:36,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529004833] [2021-04-15 05:17:36,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:36,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:17:36,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:36,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:36,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:36,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:36,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-04-15 05:17:36,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312961063] [2021-04-15 05:17:36,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:17:36,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:17:36,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:17:36,578 INFO L87 Difference]: Start difference. First operand 76435 states and 224966 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:37,156 INFO L93 Difference]: Finished difference Result 78523 states and 230946 transitions. [2021-04-15 05:17:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:17:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:37,332 INFO L225 Difference]: With dead ends: 78523 [2021-04-15 05:17:37,333 INFO L226 Difference]: Without dead ends: 78399 [2021-04-15 05:17:37,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:17:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78399 states. [2021-04-15 05:17:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78399 to 77993. [2021-04-15 05:17:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77993 states, 77992 states have (on average 2.944750743666017) internal successors, (229667), 77992 states have internal predecessors, (229667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77993 states to 77993 states and 229667 transitions. [2021-04-15 05:17:38,911 INFO L78 Accepts]: Start accepts. Automaton has 77993 states and 229667 transitions. Word has length 40 [2021-04-15 05:17:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:38,912 INFO L480 AbstractCegarLoop]: Abstraction has 77993 states and 229667 transitions. [2021-04-15 05:17:38,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 77993 states and 229667 transitions. [2021-04-15 05:17:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:39,323 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:39,323 INFO L551 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] [2021-04-15 05:17:39,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-04-15 05:17:39,533 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1373433222, now seen corresponding path program 150 times [2021-04-15 05:17:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:39,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014949] [2021-04-15 05:17:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014949] [2021-04-15 05:17:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504872660] [2021-04-15 05:17:39,667 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:39,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:17:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:39,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:39,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:39,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-04-15 05:17:39,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272982118] [2021-04-15 05:17:39,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:17:39,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:39,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:17:39,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:17:39,955 INFO L87 Difference]: Start difference. First operand 77993 states and 229667 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:40,629 INFO L93 Difference]: Finished difference Result 78524 states and 230863 transitions. [2021-04-15 05:17:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:17:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:40,777 INFO L225 Difference]: With dead ends: 78524 [2021-04-15 05:17:40,778 INFO L226 Difference]: Without dead ends: 78394 [2021-04-15 05:17:40,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 329.9ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:17:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78394 states. [2021-04-15 05:17:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78394 to 77977. [2021-04-15 05:17:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77977 states, 77976 states have (on average 2.944790704832256) internal successors, (229623), 77976 states have internal predecessors, (229623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77977 states to 77977 states and 229623 transitions. [2021-04-15 05:17:42,349 INFO L78 Accepts]: Start accepts. Automaton has 77977 states and 229623 transitions. Word has length 40 [2021-04-15 05:17:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:42,349 INFO L480 AbstractCegarLoop]: Abstraction has 77977 states and 229623 transitions. [2021-04-15 05:17:42,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 77977 states and 229623 transitions. [2021-04-15 05:17:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 05:17:42,476 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:42,476 INFO L551 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] [2021-04-15 05:17:42,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-04-15 05:17:42,677 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 87314106, now seen corresponding path program 151 times [2021-04-15 05:17:42,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:42,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358876838] [2021-04-15 05:17:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:42,948 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-04-15 05:17:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:43,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358876838] [2021-04-15 05:17:43,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175062753] [2021-04-15 05:17:43,082 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:43,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:43,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:43,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-04-15 05:17:43,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590849098] [2021-04-15 05:17:43,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:17:43,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:17:43,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:17:43,387 INFO L87 Difference]: Start difference. First operand 77977 states and 229623 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:44,025 INFO L93 Difference]: Finished difference Result 78483 states and 230757 transitions. [2021-04-15 05:17:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:17:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 05:17:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:44,171 INFO L225 Difference]: With dead ends: 78483 [2021-04-15 05:17:44,171 INFO L226 Difference]: Without dead ends: 78407 [2021-04-15 05:17:44,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:17:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78407 states. [2021-04-15 05:17:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78407 to 71577. [2021-04-15 05:17:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71577 states, 71576 states have (on average 2.945861741365821) internal successors, (210853), 71576 states have internal predecessors, (210853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71577 states to 71577 states and 210853 transitions. [2021-04-15 05:17:45,651 INFO L78 Accepts]: Start accepts. Automaton has 71577 states and 210853 transitions. Word has length 40 [2021-04-15 05:17:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:45,651 INFO L480 AbstractCegarLoop]: Abstraction has 71577 states and 210853 transitions. [2021-04-15 05:17:45,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 71577 states and 210853 transitions. [2021-04-15 05:17:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:17:45,776 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:45,776 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:17:45,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:45,977 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1013579830, now seen corresponding path program 152 times [2021-04-15 05:17:45,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:45,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587085732] [2021-04-15 05:17:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:46,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587085732] [2021-04-15 05:17:46,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943986054] [2021-04-15 05:17:46,024 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:46,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:46,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:46,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:46,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-04-15 05:17:46,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163707982] [2021-04-15 05:17:46,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:17:46,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:17:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:17:46,151 INFO L87 Difference]: Start difference. First operand 71577 states and 210853 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:46,976 INFO L93 Difference]: Finished difference Result 93025 states and 273791 transitions. [2021-04-15 05:17:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:17:46,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:17:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:47,165 INFO L225 Difference]: With dead ends: 93025 [2021-04-15 05:17:47,165 INFO L226 Difference]: Without dead ends: 93025 [2021-04-15 05:17:47,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:17:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93025 states. [2021-04-15 05:17:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93025 to 72641. [2021-04-15 05:17:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72641 states, 72640 states have (on average 2.9443832599118944) internal successors, (213880), 72640 states have internal predecessors, (213880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72641 states to 72641 states and 213880 transitions. [2021-04-15 05:17:48,774 INFO L78 Accepts]: Start accepts. Automaton has 72641 states and 213880 transitions. Word has length 43 [2021-04-15 05:17:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:48,774 INFO L480 AbstractCegarLoop]: Abstraction has 72641 states and 213880 transitions. [2021-04-15 05:17:48,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 72641 states and 213880 transitions. [2021-04-15 05:17:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:17:48,883 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:48,883 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:17:49,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:49,084 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash -22106132, now seen corresponding path program 153 times [2021-04-15 05:17:49,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:49,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828705858] [2021-04-15 05:17:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:49,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828705858] [2021-04-15 05:17:49,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105304757] [2021-04-15 05:17:49,133 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:49,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:17:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:49,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:49,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-04-15 05:17:49,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033963389] [2021-04-15 05:17:49,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:17:49,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:17:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:17:49,271 INFO L87 Difference]: Start difference. First operand 72641 states and 213880 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:50,196 INFO L93 Difference]: Finished difference Result 111307 states and 324666 transitions. [2021-04-15 05:17:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:17:50,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:17:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:50,447 INFO L225 Difference]: With dead ends: 111307 [2021-04-15 05:17:50,447 INFO L226 Difference]: Without dead ends: 111220 [2021-04-15 05:17:50,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:17:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111220 states. [2021-04-15 05:17:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111220 to 72641. [2021-04-15 05:17:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72641 states, 72640 states have (on average 2.9442318281938324) internal successors, (213869), 72640 states have internal predecessors, (213869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72641 states to 72641 states and 213869 transitions. [2021-04-15 05:17:52,259 INFO L78 Accepts]: Start accepts. Automaton has 72641 states and 213869 transitions. Word has length 43 [2021-04-15 05:17:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:52,259 INFO L480 AbstractCegarLoop]: Abstraction has 72641 states and 213869 transitions. [2021-04-15 05:17:52,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 72641 states and 213869 transitions. [2021-04-15 05:17:52,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:17:52,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:52,393 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:17:52,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:52,599 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1136369384, now seen corresponding path program 154 times [2021-04-15 05:17:52,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:52,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176077389] [2021-04-15 05:17:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:52,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176077389] [2021-04-15 05:17:52,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112897049] [2021-04-15 05:17:52,660 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:52,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:17:52,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:52,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:52,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:17:52,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009876755] [2021-04-15 05:17:52,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:17:52,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:52,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:17:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:17:52,852 INFO L87 Difference]: Start difference. First operand 72641 states and 213869 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:17:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:54,593 INFO L93 Difference]: Finished difference Result 126511 states and 368306 transitions. [2021-04-15 05:17:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:17:54,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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 43 [2021-04-15 05:17:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:54,868 INFO L225 Difference]: With dead ends: 126511 [2021-04-15 05:17:54,868 INFO L226 Difference]: Without dead ends: 126481 [2021-04-15 05:17:54,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 05:17:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126481 states. [2021-04-15 05:17:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126481 to 87008. [2021-04-15 05:17:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87008 states, 87007 states have (on average 2.953808314273564) internal successors, (257002), 87007 states have internal predecessors, (257002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87008 states to 87008 states and 257002 transitions. [2021-04-15 05:17:57,326 INFO L78 Accepts]: Start accepts. Automaton has 87008 states and 257002 transitions. Word has length 43 [2021-04-15 05:17:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:57,326 INFO L480 AbstractCegarLoop]: Abstraction has 87008 states and 257002 transitions. [2021-04-15 05:17:57,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:17:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 87008 states and 257002 transitions. [2021-04-15 05:17:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:17:57,451 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:57,451 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:17:57,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-04-15 05:17:57,652 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:57,652 INFO L82 PathProgramCache]: Analyzing trace with hash 925672338, now seen corresponding path program 155 times [2021-04-15 05:17:57,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:57,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536464754] [2021-04-15 05:17:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:57,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536464754] [2021-04-15 05:17:57,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184865228] [2021-04-15 05:17:57,709 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:57,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:17:57,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:57,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:57,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:17:57,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851173089] [2021-04-15 05:17:57,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:17:57,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:57,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:17:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:17:57,849 INFO L87 Difference]: Start difference. First operand 87008 states and 257002 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:59,266 INFO L93 Difference]: Finished difference Result 102246 states and 299982 transitions. [2021-04-15 05:17:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 05:17:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:17:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:59,499 INFO L225 Difference]: With dead ends: 102246 [2021-04-15 05:17:59,500 INFO L226 Difference]: Without dead ends: 102234 [2021-04-15 05:17:59,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:17:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102234 states. [2021-04-15 05:18:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102234 to 90132. [2021-04-15 05:18:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90132 states, 90131 states have (on average 2.958493747989038) internal successors, (266652), 90131 states have internal predecessors, (266652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90132 states to 90132 states and 266652 transitions. [2021-04-15 05:18:01,520 INFO L78 Accepts]: Start accepts. Automaton has 90132 states and 266652 transitions. Word has length 43 [2021-04-15 05:18:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:01,521 INFO L480 AbstractCegarLoop]: Abstraction has 90132 states and 266652 transitions. [2021-04-15 05:18:01,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 90132 states and 266652 transitions. [2021-04-15 05:18:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:01,656 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:01,657 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:01,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-04-15 05:18:01,857 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1654424156, now seen corresponding path program 156 times [2021-04-15 05:18:01,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:01,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82281803] [2021-04-15 05:18:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:01,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82281803] [2021-04-15 05:18:01,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279609994] [2021-04-15 05:18:01,912 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:01,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:18:01,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:01,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:01,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:02,329 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 05:18:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:02,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:02,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:18:02,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491160025] [2021-04-15 05:18:02,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:02,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:02,427 INFO L87 Difference]: Start difference. First operand 90132 states and 266652 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:03,690 INFO L93 Difference]: Finished difference Result 104209 states and 304992 transitions. [2021-04-15 05:18:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:18:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:18:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:03,933 INFO L225 Difference]: With dead ends: 104209 [2021-04-15 05:18:03,933 INFO L226 Difference]: Without dead ends: 104209 [2021-04-15 05:18:03,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:18:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104209 states. [2021-04-15 05:18:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104209 to 82806. [2021-04-15 05:18:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82806 states, 82805 states have (on average 2.950872531851941) internal successors, (244347), 82805 states have internal predecessors, (244347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82806 states to 82806 states and 244347 transitions. [2021-04-15 05:18:06,219 INFO L78 Accepts]: Start accepts. Automaton has 82806 states and 244347 transitions. Word has length 43 [2021-04-15 05:18:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:06,219 INFO L480 AbstractCegarLoop]: Abstraction has 82806 states and 244347 transitions. [2021-04-15 05:18:06,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 82806 states and 244347 transitions. [2021-04-15 05:18:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:06,333 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:06,334 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:06,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-04-15 05:18:06,534 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1277453002, now seen corresponding path program 157 times [2021-04-15 05:18:06,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:06,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751840128] [2021-04-15 05:18:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:06,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751840128] [2021-04-15 05:18:06,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863701344] [2021-04-15 05:18:06,581 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:06,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:06,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:18:06,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495000530] [2021-04-15 05:18:06,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:06,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:06,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:06,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:06,723 INFO L87 Difference]: Start difference. First operand 82806 states and 244347 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:07,749 INFO L93 Difference]: Finished difference Result 121068 states and 352472 transitions. [2021-04-15 05:18:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 05:18:07,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:18:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:08,814 INFO L225 Difference]: With dead ends: 121068 [2021-04-15 05:18:08,814 INFO L226 Difference]: Without dead ends: 121054 [2021-04-15 05:18:08,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:18:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121054 states. [2021-04-15 05:18:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121054 to 76188. [2021-04-15 05:18:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76188 states, 76187 states have (on average 2.9398978828409046) internal successors, (223982), 76187 states have internal predecessors, (223982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76188 states to 76188 states and 223982 transitions. [2021-04-15 05:18:10,777 INFO L78 Accepts]: Start accepts. Automaton has 76188 states and 223982 transitions. Word has length 43 [2021-04-15 05:18:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:10,777 INFO L480 AbstractCegarLoop]: Abstraction has 76188 states and 223982 transitions. [2021-04-15 05:18:10,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 76188 states and 223982 transitions. [2021-04-15 05:18:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:10,883 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:10,883 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:11,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-04-15 05:18:11,084 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1361851776, now seen corresponding path program 158 times [2021-04-15 05:18:11,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:11,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092720743] [2021-04-15 05:18:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:11,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092720743] [2021-04-15 05:18:11,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128362372] [2021-04-15 05:18:11,131 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:11,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:18:11,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:11,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:11,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:11,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:11,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:18:11,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317464420] [2021-04-15 05:18:11,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:11,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:11,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:11,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:11,275 INFO L87 Difference]: Start difference. First operand 76188 states and 223982 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:12,686 INFO L93 Difference]: Finished difference Result 117078 states and 340699 transitions. [2021-04-15 05:18:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:18:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:18:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:12,961 INFO L225 Difference]: With dead ends: 117078 [2021-04-15 05:18:12,961 INFO L226 Difference]: Without dead ends: 117022 [2021-04-15 05:18:12,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:18:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117022 states. [2021-04-15 05:18:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117022 to 77346. [2021-04-15 05:18:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77346 states, 77345 states have (on average 2.9375783825715946) internal successors, (227207), 77345 states have internal predecessors, (227207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77346 states to 77346 states and 227207 transitions. [2021-04-15 05:18:15,028 INFO L78 Accepts]: Start accepts. Automaton has 77346 states and 227207 transitions. Word has length 43 [2021-04-15 05:18:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:15,028 INFO L480 AbstractCegarLoop]: Abstraction has 77346 states and 227207 transitions. [2021-04-15 05:18:15,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 77346 states and 227207 transitions. [2021-04-15 05:18:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:15,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:15,136 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:15,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-04-15 05:18:15,337 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1293078010, now seen corresponding path program 159 times [2021-04-15 05:18:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:15,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879345181] [2021-04-15 05:18:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:15,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879345181] [2021-04-15 05:18:15,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36106416] [2021-04-15 05:18:15,396 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:15,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:18:15,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:15,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:15,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:15,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:18:15,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287605705] [2021-04-15 05:18:15,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:15,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:15,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:15,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:15,538 INFO L87 Difference]: Start difference. First operand 77346 states and 227207 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:16,857 INFO L93 Difference]: Finished difference Result 119416 states and 347327 transitions. [2021-04-15 05:18:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:18:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:18:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:17,112 INFO L225 Difference]: With dead ends: 119416 [2021-04-15 05:18:17,113 INFO L226 Difference]: Without dead ends: 119318 [2021-04-15 05:18:17,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:18:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119318 states. [2021-04-15 05:18:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119318 to 78282. [2021-04-15 05:18:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78282 states, 78281 states have (on average 2.9364852263001238) internal successors, (229871), 78281 states have internal predecessors, (229871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78282 states to 78282 states and 229871 transitions. [2021-04-15 05:18:19,443 INFO L78 Accepts]: Start accepts. Automaton has 78282 states and 229871 transitions. Word has length 43 [2021-04-15 05:18:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:19,443 INFO L480 AbstractCegarLoop]: Abstraction has 78282 states and 229871 transitions. [2021-04-15 05:18:19,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 78282 states and 229871 transitions. [2021-04-15 05:18:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:19,548 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:19,549 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:19,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-04-15 05:18:19,749 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1811390400, now seen corresponding path program 160 times [2021-04-15 05:18:19,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:19,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957979013] [2021-04-15 05:18:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:19,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957979013] [2021-04-15 05:18:19,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092785936] [2021-04-15 05:18:19,799 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:19,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:18:19,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:19,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:19,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:19,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:19,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:18:19,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586703001] [2021-04-15 05:18:19,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:19,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:19,944 INFO L87 Difference]: Start difference. First operand 78282 states and 229871 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:20,676 INFO L93 Difference]: Finished difference Result 113086 states and 328906 transitions. [2021-04-15 05:18:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:18:20,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:18:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:20,924 INFO L225 Difference]: With dead ends: 113086 [2021-04-15 05:18:20,924 INFO L226 Difference]: Without dead ends: 113016 [2021-04-15 05:18:20,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:18:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113016 states. [2021-04-15 05:18:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113016 to 78282. [2021-04-15 05:18:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78282 states, 78281 states have (on average 2.935437717964768) internal successors, (229789), 78281 states have internal predecessors, (229789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78282 states to 78282 states and 229789 transitions. [2021-04-15 05:18:23,269 INFO L78 Accepts]: Start accepts. Automaton has 78282 states and 229789 transitions. Word has length 43 [2021-04-15 05:18:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:23,269 INFO L480 AbstractCegarLoop]: Abstraction has 78282 states and 229789 transitions. [2021-04-15 05:18:23,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 78282 states and 229789 transitions. [2021-04-15 05:18:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:23,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:23,381 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:23,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-04-15 05:18:23,582 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash -939318, now seen corresponding path program 161 times [2021-04-15 05:18:23,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:23,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658198112] [2021-04-15 05:18:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658198112] [2021-04-15 05:18:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079000005] [2021-04-15 05:18:23,631 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:23,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 05:18:23,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:23,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:23,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:23,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:18:23,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595332399] [2021-04-15 05:18:23,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:18:23,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:23,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:18:23,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:18:23,781 INFO L87 Difference]: Start difference. First operand 78282 states and 229789 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:24,790 INFO L93 Difference]: Finished difference Result 93588 states and 273166 transitions. [2021-04-15 05:18:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:18:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:18:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:25,485 INFO L225 Difference]: With dead ends: 93588 [2021-04-15 05:18:25,485 INFO L226 Difference]: Without dead ends: 93528 [2021-04-15 05:18:25,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:18:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93528 states. [2021-04-15 05:18:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93528 to 81258. [2021-04-15 05:18:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81258 states, 81257 states have (on average 2.9344056512054344) internal successors, (238441), 81257 states have internal predecessors, (238441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81258 states to 81258 states and 238441 transitions. [2021-04-15 05:18:27,310 INFO L78 Accepts]: Start accepts. Automaton has 81258 states and 238441 transitions. Word has length 43 [2021-04-15 05:18:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:27,310 INFO L480 AbstractCegarLoop]: Abstraction has 81258 states and 238441 transitions. [2021-04-15 05:18:27,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 81258 states and 238441 transitions. [2021-04-15 05:18:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:27,444 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:27,444 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:27,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:27,645 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash 415720322, now seen corresponding path program 162 times [2021-04-15 05:18:27,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:27,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71082473] [2021-04-15 05:18:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:27,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71082473] [2021-04-15 05:18:27,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284687554] [2021-04-15 05:18:27,686 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:27,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:18:27,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:27,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:27,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:27,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:18:27,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868754790] [2021-04-15 05:18:27,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:27,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:27,830 INFO L87 Difference]: Start difference. First operand 81258 states and 238441 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:29,255 INFO L93 Difference]: Finished difference Result 96814 states and 281237 transitions. [2021-04-15 05:18:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:18:29,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:18:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:29,441 INFO L225 Difference]: With dead ends: 96814 [2021-04-15 05:18:29,442 INFO L226 Difference]: Without dead ends: 96786 [2021-04-15 05:18:29,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 587.8ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:18:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96786 states. [2021-04-15 05:18:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96786 to 75788. [2021-04-15 05:18:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75788 states, 75787 states have (on average 2.9350680195811947) internal successors, (222440), 75787 states have internal predecessors, (222440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75788 states to 75788 states and 222440 transitions. [2021-04-15 05:18:31,724 INFO L78 Accepts]: Start accepts. Automaton has 75788 states and 222440 transitions. Word has length 43 [2021-04-15 05:18:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:31,724 INFO L480 AbstractCegarLoop]: Abstraction has 75788 states and 222440 transitions. [2021-04-15 05:18:31,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 75788 states and 222440 transitions. [2021-04-15 05:18:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:31,859 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:31,859 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:32,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:32,060 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash -976949870, now seen corresponding path program 163 times [2021-04-15 05:18:32,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:32,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079257758] [2021-04-15 05:18:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079257758] [2021-04-15 05:18:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117882561] [2021-04-15 05:18:32,129 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:32,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:32,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:18:32,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789930628] [2021-04-15 05:18:32,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:18:32,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:18:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:18:32,345 INFO L87 Difference]: Start difference. First operand 75788 states and 222440 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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) [2021-04-15 05:18:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:33,422 INFO L93 Difference]: Finished difference Result 95697 states and 278219 transitions. [2021-04-15 05:18:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 05:18:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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 43 [2021-04-15 05:18:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:33,641 INFO L225 Difference]: With dead ends: 95697 [2021-04-15 05:18:33,642 INFO L226 Difference]: Without dead ends: 95559 [2021-04-15 05:18:33,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 05:18:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95559 states. [2021-04-15 05:18:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95559 to 79124. [2021-04-15 05:18:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79124 states, 79123 states have (on average 2.930753383971791) internal successors, (231890), 79123 states have internal predecessors, (231890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79124 states to 79124 states and 231890 transitions. [2021-04-15 05:18:35,767 INFO L78 Accepts]: Start accepts. Automaton has 79124 states and 231890 transitions. Word has length 43 [2021-04-15 05:18:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:35,767 INFO L480 AbstractCegarLoop]: Abstraction has 79124 states and 231890 transitions. [2021-04-15 05:18:35,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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) [2021-04-15 05:18:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 79124 states and 231890 transitions. [2021-04-15 05:18:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:35,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:35,879 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:36,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:36,079 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash -725487968, now seen corresponding path program 164 times [2021-04-15 05:18:36,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:36,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788319218] [2021-04-15 05:18:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:36,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788319218] [2021-04-15 05:18:36,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037694360] [2021-04-15 05:18:36,117 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:36,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:18:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:36,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:36,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-04-15 05:18:36,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510097053] [2021-04-15 05:18:36,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:36,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:36,275 INFO L87 Difference]: Start difference. First operand 79124 states and 231890 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:37,977 INFO L93 Difference]: Finished difference Result 103605 states and 300307 transitions. [2021-04-15 05:18:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 05:18:37,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:18:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:38,259 INFO L225 Difference]: With dead ends: 103605 [2021-04-15 05:18:38,259 INFO L226 Difference]: Without dead ends: 103570 [2021-04-15 05:18:38,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 702.6ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 05:18:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103570 states. [2021-04-15 05:18:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103570 to 84672. [2021-04-15 05:18:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84672 states, 84671 states have (on average 2.9324089711943877) internal successors, (248290), 84671 states have internal predecessors, (248290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84672 states to 84672 states and 248290 transitions. [2021-04-15 05:18:40,244 INFO L78 Accepts]: Start accepts. Automaton has 84672 states and 248290 transitions. Word has length 43 [2021-04-15 05:18:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:40,244 INFO L480 AbstractCegarLoop]: Abstraction has 84672 states and 248290 transitions. [2021-04-15 05:18:40,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 84672 states and 248290 transitions. [2021-04-15 05:18:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:40,384 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:40,384 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:40,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:40,585 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:40,585 INFO L82 PathProgramCache]: Analyzing trace with hash -378710582, now seen corresponding path program 165 times [2021-04-15 05:18:40,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:40,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086072221] [2021-04-15 05:18:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:40,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086072221] [2021-04-15 05:18:40,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383965198] [2021-04-15 05:18:40,635 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:40,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:18:40,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:40,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:40,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:18:40,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506507903] [2021-04-15 05:18:40,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:18:40,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:18:40,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:18:40,815 INFO L87 Difference]: Start difference. First operand 84672 states and 248290 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:42,327 INFO L93 Difference]: Finished difference Result 103499 states and 300302 transitions. [2021-04-15 05:18:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:18:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:18:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:42,581 INFO L225 Difference]: With dead ends: 103499 [2021-04-15 05:18:42,581 INFO L226 Difference]: Without dead ends: 103307 [2021-04-15 05:18:42,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:18:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103307 states. [2021-04-15 05:18:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103307 to 88452. [2021-04-15 05:18:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88452 states, 88451 states have (on average 2.92898893172491) internal successors, (259072), 88451 states have internal predecessors, (259072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88452 states to 88452 states and 259072 transitions. [2021-04-15 05:18:44,951 INFO L78 Accepts]: Start accepts. Automaton has 88452 states and 259072 transitions. Word has length 43 [2021-04-15 05:18:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:44,951 INFO L480 AbstractCegarLoop]: Abstraction has 88452 states and 259072 transitions. [2021-04-15 05:18:44,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 88452 states and 259072 transitions. [2021-04-15 05:18:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:45,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:45,079 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:45,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:45,280 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash 499459778, now seen corresponding path program 166 times [2021-04-15 05:18:45,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:45,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523986084] [2021-04-15 05:18:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:45,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523986084] [2021-04-15 05:18:45,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220075846] [2021-04-15 05:18:45,311 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:45,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:18:45,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:45,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:45,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-04-15 05:18:45,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463827965] [2021-04-15 05:18:45,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:45,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:45,470 INFO L87 Difference]: Start difference. First operand 88452 states and 259072 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2021-04-15 05:18:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:47,220 INFO L93 Difference]: Finished difference Result 121966 states and 353871 transitions. [2021-04-15 05:18:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:18:47,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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 43 [2021-04-15 05:18:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:47,474 INFO L225 Difference]: With dead ends: 121966 [2021-04-15 05:18:47,475 INFO L226 Difference]: Without dead ends: 121938 [2021-04-15 05:18:47,475 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 685.3ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:18:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121938 states. [2021-04-15 05:18:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121938 to 103002. [2021-04-15 05:18:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103002 states, 103001 states have (on average 2.9221755128590985) internal successors, (300987), 103001 states have internal predecessors, (300987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103002 states to 103002 states and 300987 transitions. [2021-04-15 05:18:50,215 INFO L78 Accepts]: Start accepts. Automaton has 103002 states and 300987 transitions. Word has length 43 [2021-04-15 05:18:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:50,215 INFO L480 AbstractCegarLoop]: Abstraction has 103002 states and 300987 transitions. [2021-04-15 05:18:50,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2021-04-15 05:18:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 103002 states and 300987 transitions. [2021-04-15 05:18:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:50,361 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:50,361 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:50,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-04-15 05:18:50,561 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:50,562 INFO L82 PathProgramCache]: Analyzing trace with hash 223084418, now seen corresponding path program 167 times [2021-04-15 05:18:50,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:50,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157735521] [2021-04-15 05:18:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157735521] [2021-04-15 05:18:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665376684] [2021-04-15 05:18:50,611 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:50,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:18:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:50,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:50,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:50,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-04-15 05:18:50,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738194415] [2021-04-15 05:18:50,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:18:50,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:18:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:18:50,767 INFO L87 Difference]: Start difference. First operand 103002 states and 300987 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:51,468 INFO L93 Difference]: Finished difference Result 115037 states and 335174 transitions. [2021-04-15 05:18:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:18:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:18:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:52,218 INFO L225 Difference]: With dead ends: 115037 [2021-04-15 05:18:52,219 INFO L226 Difference]: Without dead ends: 115037 [2021-04-15 05:18:52,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:18:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115037 states. [2021-04-15 05:18:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115037 to 103880. [2021-04-15 05:18:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103880 states, 103879 states have (on average 2.9223808469469286) internal successors, (303574), 103879 states have internal predecessors, (303574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103880 states to 103880 states and 303574 transitions. [2021-04-15 05:18:54,402 INFO L78 Accepts]: Start accepts. Automaton has 103880 states and 303574 transitions. Word has length 43 [2021-04-15 05:18:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:54,403 INFO L480 AbstractCegarLoop]: Abstraction has 103880 states and 303574 transitions. [2021-04-15 05:18:54,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 103880 states and 303574 transitions. [2021-04-15 05:18:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:54,549 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:54,549 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:54,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:54,750 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1001606290, now seen corresponding path program 168 times [2021-04-15 05:18:54,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:54,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922619329] [2021-04-15 05:18:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:54,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922619329] [2021-04-15 05:18:54,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587042911] [2021-04-15 05:18:54,800 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:54,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:18:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-04-15 05:18:55,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408299208] [2021-04-15 05:18:55,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:18:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:18:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:18:55,340 INFO L87 Difference]: Start difference. First operand 103880 states and 303574 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:55,980 INFO L93 Difference]: Finished difference Result 123538 states and 357951 transitions. [2021-04-15 05:18:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:18:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:18:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:56,238 INFO L225 Difference]: With dead ends: 123538 [2021-04-15 05:18:56,239 INFO L226 Difference]: Without dead ends: 123466 [2021-04-15 05:18:56,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:18:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123466 states. [2021-04-15 05:18:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123466 to 103880. [2021-04-15 05:18:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103880 states, 103879 states have (on average 2.9222845810991633) internal successors, (303564), 103879 states have internal predecessors, (303564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103880 states to 103880 states and 303564 transitions. [2021-04-15 05:18:58,944 INFO L78 Accepts]: Start accepts. Automaton has 103880 states and 303564 transitions. Word has length 43 [2021-04-15 05:18:58,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:58,944 INFO L480 AbstractCegarLoop]: Abstraction has 103880 states and 303564 transitions. [2021-04-15 05:18:58,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 103880 states and 303564 transitions. [2021-04-15 05:18:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:18:59,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:59,082 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:18:59,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-04-15 05:18:59,283 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:59,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:59,283 INFO L82 PathProgramCache]: Analyzing trace with hash 5413476, now seen corresponding path program 169 times [2021-04-15 05:18:59,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:59,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387239560] [2021-04-15 05:18:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:59,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387239560] [2021-04-15 05:18:59,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531658363] [2021-04-15 05:18:59,348 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:59,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:59,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:18:59,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587516463] [2021-04-15 05:18:59,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:18:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:18:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:18:59,486 INFO L87 Difference]: Start difference. First operand 103880 states and 303564 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:00,219 INFO L93 Difference]: Finished difference Result 113177 states and 328961 transitions. [2021-04-15 05:19:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:19:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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 43 [2021-04-15 05:19:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:01,014 INFO L225 Difference]: With dead ends: 113177 [2021-04-15 05:19:01,014 INFO L226 Difference]: Without dead ends: 113177 [2021-04-15 05:19:01,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:19:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113177 states. [2021-04-15 05:19:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113177 to 104664. [2021-04-15 05:19:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104664 states, 104663 states have (on average 2.9217775144989155) internal successors, (305802), 104663 states have internal predecessors, (305802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104664 states to 104664 states and 305802 transitions. [2021-04-15 05:19:03,308 INFO L78 Accepts]: Start accepts. Automaton has 104664 states and 305802 transitions. Word has length 43 [2021-04-15 05:19:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:03,308 INFO L480 AbstractCegarLoop]: Abstraction has 104664 states and 305802 transitions. [2021-04-15 05:19:03,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 104664 states and 305802 transitions. [2021-04-15 05:19:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:03,493 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:03,493 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:03,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-04-15 05:19:03,694 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1165282054, now seen corresponding path program 170 times [2021-04-15 05:19:03,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:03,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773846612] [2021-04-15 05:19:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:03,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773846612] [2021-04-15 05:19:03,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661439336] [2021-04-15 05:19:03,743 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:03,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:19:03,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:04,209 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-04-15 05:19:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:04,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:04,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:04,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767674049] [2021-04-15 05:19:04,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:04,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:04,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:04,342 INFO L87 Difference]: Start difference. First operand 104664 states and 305802 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:05,191 INFO L93 Difference]: Finished difference Result 125118 states and 361907 transitions. [2021-04-15 05:19:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:19:05,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:19:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:05,464 INFO L225 Difference]: With dead ends: 125118 [2021-04-15 05:19:05,465 INFO L226 Difference]: Without dead ends: 125058 [2021-04-15 05:19:05,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:19:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125058 states. [2021-04-15 05:19:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125058 to 107834. [2021-04-15 05:19:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107834 states, 107833 states have (on average 2.9243645266291396) internal successors, (315343), 107833 states have internal predecessors, (315343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107834 states to 107834 states and 315343 transitions. [2021-04-15 05:19:08,378 INFO L78 Accepts]: Start accepts. Automaton has 107834 states and 315343 transitions. Word has length 43 [2021-04-15 05:19:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:08,378 INFO L480 AbstractCegarLoop]: Abstraction has 107834 states and 315343 transitions. [2021-04-15 05:19:08,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 107834 states and 315343 transitions. [2021-04-15 05:19:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:08,557 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:08,557 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:08,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-04-15 05:19:08,758 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:08,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1534575938, now seen corresponding path program 171 times [2021-04-15 05:19:08,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:08,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443997880] [2021-04-15 05:19:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:08,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443997880] [2021-04-15 05:19:08,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457504825] [2021-04-15 05:19:08,808 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:08,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:19:08,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:08,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:08,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:08,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84770833] [2021-04-15 05:19:08,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:08,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:08,952 INFO L87 Difference]: Start difference. First operand 107834 states and 315343 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:09,873 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-04-15 05:19:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:10,665 INFO L93 Difference]: Finished difference Result 122629 states and 356121 transitions. [2021-04-15 05:19:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 05:19:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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 43 [2021-04-15 05:19:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:10,920 INFO L225 Difference]: With dead ends: 122629 [2021-04-15 05:19:10,920 INFO L226 Difference]: Without dead ends: 122629 [2021-04-15 05:19:10,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 987.0ms TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:19:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122629 states. [2021-04-15 05:19:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122629 to 110778. [2021-04-15 05:19:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110778 states, 110777 states have (on average 2.9219513075818986) internal successors, (323685), 110777 states have internal predecessors, (323685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110778 states to 110778 states and 323685 transitions. [2021-04-15 05:19:13,788 INFO L78 Accepts]: Start accepts. Automaton has 110778 states and 323685 transitions. Word has length 43 [2021-04-15 05:19:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:13,788 INFO L480 AbstractCegarLoop]: Abstraction has 110778 states and 323685 transitions. [2021-04-15 05:19:13,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 110778 states and 323685 transitions. [2021-04-15 05:19:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:13,984 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:13,984 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:14,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-04-15 05:19:14,184 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash -268885396, now seen corresponding path program 172 times [2021-04-15 05:19:14,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:14,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561797200] [2021-04-15 05:19:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:14,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561797200] [2021-04-15 05:19:14,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297489311] [2021-04-15 05:19:14,233 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:14,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:19:14,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:14,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:14,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:14,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:14,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533703358] [2021-04-15 05:19:14,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:14,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:14,382 INFO L87 Difference]: Start difference. First operand 110778 states and 323685 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:16,021 INFO L93 Difference]: Finished difference Result 147552 states and 427956 transitions. [2021-04-15 05:19:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:19:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:19:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:16,348 INFO L225 Difference]: With dead ends: 147552 [2021-04-15 05:19:16,348 INFO L226 Difference]: Without dead ends: 147468 [2021-04-15 05:19:16,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:19:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147468 states. [2021-04-15 05:19:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147468 to 124054. [2021-04-15 05:19:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124054 states, 124053 states have (on average 2.916713017823027) internal successors, (361827), 124053 states have internal predecessors, (361827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124054 states to 124054 states and 361827 transitions. [2021-04-15 05:19:19,417 INFO L78 Accepts]: Start accepts. Automaton has 124054 states and 361827 transitions. Word has length 43 [2021-04-15 05:19:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:19,417 INFO L480 AbstractCegarLoop]: Abstraction has 124054 states and 361827 transitions. [2021-04-15 05:19:19,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 124054 states and 361827 transitions. [2021-04-15 05:19:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:19,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:19,617 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:19,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:19,817 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash -471353564, now seen corresponding path program 173 times [2021-04-15 05:19:19,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:19,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812904271] [2021-04-15 05:19:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:19,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812904271] [2021-04-15 05:19:19,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841662040] [2021-04-15 05:19:19,868 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:19,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:19:19,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:19,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:19,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:20,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:20,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:20,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017206433] [2021-04-15 05:19:20,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:20,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:20,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:20,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:20,008 INFO L87 Difference]: Start difference. First operand 124054 states and 361827 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:22,051 INFO L93 Difference]: Finished difference Result 146821 states and 425207 transitions. [2021-04-15 05:19:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 05:19:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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 43 [2021-04-15 05:19:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:22,392 INFO L225 Difference]: With dead ends: 146821 [2021-04-15 05:19:22,392 INFO L226 Difference]: Without dead ends: 146821 [2021-04-15 05:19:22,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1192.1ms TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:19:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146821 states. [2021-04-15 05:19:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146821 to 128112. [2021-04-15 05:19:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128112 states, 128111 states have (on average 2.918640866123908) internal successors, (373910), 128111 states have internal predecessors, (373910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128112 states to 128112 states and 373910 transitions. [2021-04-15 05:19:26,253 INFO L78 Accepts]: Start accepts. Automaton has 128112 states and 373910 transitions. Word has length 43 [2021-04-15 05:19:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:26,253 INFO L480 AbstractCegarLoop]: Abstraction has 128112 states and 373910 transitions. [2021-04-15 05:19:26,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 128112 states and 373910 transitions. [2021-04-15 05:19:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:26,875 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:26,875 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:27,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:27,104 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1895135802, now seen corresponding path program 174 times [2021-04-15 05:19:27,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:27,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943293640] [2021-04-15 05:19:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943293640] [2021-04-15 05:19:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873926794] [2021-04-15 05:19:27,174 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:27,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:19:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:27,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:27,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231243349] [2021-04-15 05:19:27,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:27,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:27,370 INFO L87 Difference]: Start difference. First operand 128112 states and 373910 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:28,755 INFO L93 Difference]: Finished difference Result 155433 states and 452054 transitions. [2021-04-15 05:19:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:19:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:19:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:29,097 INFO L225 Difference]: With dead ends: 155433 [2021-04-15 05:19:29,098 INFO L226 Difference]: Without dead ends: 155361 [2021-04-15 05:19:29,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:19:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155361 states. [2021-04-15 05:19:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155361 to 132284. [2021-04-15 05:19:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132284 states, 132283 states have (on average 2.9201031122668826) internal successors, (386280), 132283 states have internal predecessors, (386280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132284 states to 132284 states and 386280 transitions. [2021-04-15 05:19:32,938 INFO L78 Accepts]: Start accepts. Automaton has 132284 states and 386280 transitions. Word has length 43 [2021-04-15 05:19:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:32,938 INFO L480 AbstractCegarLoop]: Abstraction has 132284 states and 386280 transitions. [2021-04-15 05:19:32,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 132284 states and 386280 transitions. [2021-04-15 05:19:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:33,151 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:33,151 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:33,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:33,352 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash 562421890, now seen corresponding path program 175 times [2021-04-15 05:19:33,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:33,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138734871] [2021-04-15 05:19:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:33,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138734871] [2021-04-15 05:19:33,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353447781] [2021-04-15 05:19:33,411 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:33,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:33,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:33,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:33,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159017763] [2021-04-15 05:19:33,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:33,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:33,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:33,614 INFO L87 Difference]: Start difference. First operand 132284 states and 386280 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:35,770 INFO L93 Difference]: Finished difference Result 150155 states and 436032 transitions. [2021-04-15 05:19:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:19:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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 43 [2021-04-15 05:19:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:36,147 INFO L225 Difference]: With dead ends: 150155 [2021-04-15 05:19:36,148 INFO L226 Difference]: Without dead ends: 150155 [2021-04-15 05:19:36,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:19:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150155 states. [2021-04-15 05:19:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150155 to 137722. [2021-04-15 05:19:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137722 states, 137721 states have (on average 2.9257774776540977) internal successors, (402941), 137721 states have internal predecessors, (402941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137722 states to 137722 states and 402941 transitions. [2021-04-15 05:19:39,168 INFO L78 Accepts]: Start accepts. Automaton has 137722 states and 402941 transitions. Word has length 43 [2021-04-15 05:19:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:39,168 INFO L480 AbstractCegarLoop]: Abstraction has 137722 states and 402941 transitions. [2021-04-15 05:19:39,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 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) [2021-04-15 05:19:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 137722 states and 402941 transitions. [2021-04-15 05:19:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:39,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:39,394 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:39,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:39,595 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:39,595 INFO L82 PathProgramCache]: Analyzing trace with hash 351724844, now seen corresponding path program 176 times [2021-04-15 05:19:39,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:39,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914450942] [2021-04-15 05:19:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:39,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914450942] [2021-04-15 05:19:39,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465198738] [2021-04-15 05:19:39,642 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:39,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:19:39,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:39,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:39,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:39,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:39,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523641269] [2021-04-15 05:19:39,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:39,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:39,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:39,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:39,789 INFO L87 Difference]: Start difference. First operand 137722 states and 402941 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:40,599 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2021-04-15 05:19:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:41,700 INFO L93 Difference]: Finished difference Result 160830 states and 467965 transitions. [2021-04-15 05:19:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 05:19:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:19:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:42,058 INFO L225 Difference]: With dead ends: 160830 [2021-04-15 05:19:42,058 INFO L226 Difference]: Without dead ends: 160812 [2021-04-15 05:19:42,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1087.4ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:19:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160812 states. [2021-04-15 05:19:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160812 to 140830. [2021-04-15 05:19:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140830 states, 140829 states have (on average 2.926677033849562) internal successors, (412161), 140829 states have internal predecessors, (412161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140830 states to 140830 states and 412161 transitions. [2021-04-15 05:19:46,247 INFO L78 Accepts]: Start accepts. Automaton has 140830 states and 412161 transitions. Word has length 43 [2021-04-15 05:19:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:46,247 INFO L480 AbstractCegarLoop]: Abstraction has 140830 states and 412161 transitions. [2021-04-15 05:19:46,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 140830 states and 412161 transitions. [2021-04-15 05:19:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:46,465 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:46,465 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:46,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:46,666 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:46,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:46,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1080476662, now seen corresponding path program 177 times [2021-04-15 05:19:46,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:46,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438835695] [2021-04-15 05:19:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438835695] [2021-04-15 05:19:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747025861] [2021-04-15 05:19:46,714 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:46,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:19:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:46,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:46,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506844883] [2021-04-15 05:19:46,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:46,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:46,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:46,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:46,867 INFO L87 Difference]: Start difference. First operand 140830 states and 412161 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:48,937 INFO L93 Difference]: Finished difference Result 159256 states and 460219 transitions. [2021-04-15 05:19:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:19:48,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:19:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:49,302 INFO L225 Difference]: With dead ends: 159256 [2021-04-15 05:19:49,302 INFO L226 Difference]: Without dead ends: 159221 [2021-04-15 05:19:49,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 05:19:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159221 states. [2021-04-15 05:19:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159221 to 134138. [2021-04-15 05:19:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134138 states, 134137 states have (on average 2.9139834646667215) internal successors, (390873), 134137 states have internal predecessors, (390873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134138 states to 134138 states and 390873 transitions. [2021-04-15 05:19:53,239 INFO L78 Accepts]: Start accepts. Automaton has 134138 states and 390873 transitions. Word has length 43 [2021-04-15 05:19:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:53,239 INFO L480 AbstractCegarLoop]: Abstraction has 134138 states and 390873 transitions. [2021-04-15 05:19:53,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 134138 states and 390873 transitions. [2021-04-15 05:19:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:53,481 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:53,481 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:53,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:53,681 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:53,682 INFO L82 PathProgramCache]: Analyzing trace with hash 703505508, now seen corresponding path program 178 times [2021-04-15 05:19:53,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:53,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171086511] [2021-04-15 05:19:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:53,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171086511] [2021-04-15 05:19:53,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795739380] [2021-04-15 05:19:53,743 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:53,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:19:53,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:53,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:53,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:53,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:53,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796152989] [2021-04-15 05:19:53,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:53,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:53,889 INFO L87 Difference]: Start difference. First operand 134138 states and 390873 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:55,040 INFO L93 Difference]: Finished difference Result 141310 states and 410001 transitions. [2021-04-15 05:19:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:19:55,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:19:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:55,364 INFO L225 Difference]: With dead ends: 141310 [2021-04-15 05:19:55,364 INFO L226 Difference]: Without dead ends: 141296 [2021-04-15 05:19:55,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:19:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141296 states. [2021-04-15 05:19:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141296 to 115950. [2021-04-15 05:19:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115950 states, 115949 states have (on average 2.9078215422297733) internal successors, (337159), 115949 states have internal predecessors, (337159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115950 states to 115950 states and 337159 transitions. [2021-04-15 05:19:58,996 INFO L78 Accepts]: Start accepts. Automaton has 115950 states and 337159 transitions. Word has length 43 [2021-04-15 05:19:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:58,996 INFO L480 AbstractCegarLoop]: Abstraction has 115950 states and 337159 transitions. [2021-04-15 05:19:58,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 115950 states and 337159 transitions. [2021-04-15 05:19:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:19:59,159 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:59,159 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:19:59,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-04-15 05:19:59,360 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1361898402, now seen corresponding path program 179 times [2021-04-15 05:19:59,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:59,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498809360] [2021-04-15 05:19:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:59,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498809360] [2021-04-15 05:19:59,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325335513] [2021-04-15 05:19:59,411 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:59,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:19:59,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:19:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:59,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:59,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:19:59,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234060714] [2021-04-15 05:19:59,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:19:59,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:59,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:19:59,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:19:59,568 INFO L87 Difference]: Start difference. First operand 115950 states and 337159 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 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) [2021-04-15 05:20:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:00,664 INFO L93 Difference]: Finished difference Result 127926 states and 369902 transitions. [2021-04-15 05:20:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:20:00,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 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 43 [2021-04-15 05:20:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:00,938 INFO L225 Difference]: With dead ends: 127926 [2021-04-15 05:20:00,938 INFO L226 Difference]: Without dead ends: 127860 [2021-04-15 05:20:00,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:20:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127860 states. [2021-04-15 05:20:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127860 to 115578. [2021-04-15 05:20:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115578 states, 115577 states have (on average 2.908424686572588) internal successors, (336147), 115577 states have internal predecessors, (336147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115578 states to 115578 states and 336147 transitions. [2021-04-15 05:20:04,085 INFO L78 Accepts]: Start accepts. Automaton has 115578 states and 336147 transitions. Word has length 43 [2021-04-15 05:20:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:04,085 INFO L480 AbstractCegarLoop]: Abstraction has 115578 states and 336147 transitions. [2021-04-15 05:20:04,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 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) [2021-04-15 05:20:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 115578 states and 336147 transitions. [2021-04-15 05:20:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:04,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:04,878 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:05,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-04-15 05:20:05,079 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:05,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1179331944, now seen corresponding path program 180 times [2021-04-15 05:20:05,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:05,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482613175] [2021-04-15 05:20:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:05,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482613175] [2021-04-15 05:20:05,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201245907] [2021-04-15 05:20:05,124 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:05,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:20:05,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:05,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:05,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:20:05,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058582934] [2021-04-15 05:20:05,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:20:05,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:20:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:20:05,281 INFO L87 Difference]: Start difference. First operand 115578 states and 336147 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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) [2021-04-15 05:20:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:06,475 INFO L93 Difference]: Finished difference Result 133198 states and 384912 transitions. [2021-04-15 05:20:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:20:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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 43 [2021-04-15 05:20:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:06,793 INFO L225 Difference]: With dead ends: 133198 [2021-04-15 05:20:06,793 INFO L226 Difference]: Without dead ends: 133168 [2021-04-15 05:20:06,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:20:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133168 states. [2021-04-15 05:20:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133168 to 116890. [2021-04-15 05:20:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116890 states, 116889 states have (on average 2.9079810760636158) internal successors, (339911), 116889 states have internal predecessors, (339911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116890 states to 116890 states and 339911 transitions. [2021-04-15 05:20:09,940 INFO L78 Accepts]: Start accepts. Automaton has 116890 states and 339911 transitions. Word has length 43 [2021-04-15 05:20:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:09,940 INFO L480 AbstractCegarLoop]: Abstraction has 116890 states and 339911 transitions. [2021-04-15 05:20:09,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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) [2021-04-15 05:20:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 116890 states and 339911 transitions. [2021-04-15 05:20:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:10,647 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:10,647 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:10,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-04-15 05:20:10,869 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash 81707166, now seen corresponding path program 181 times [2021-04-15 05:20:10,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:10,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324005180] [2021-04-15 05:20:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:10,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324005180] [2021-04-15 05:20:10,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368318079] [2021-04-15 05:20:10,914 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:11,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:11,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:20:11,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262387919] [2021-04-15 05:20:11,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:20:11,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:11,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:20:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:20:11,074 INFO L87 Difference]: Start difference. First operand 116890 states and 339911 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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) [2021-04-15 05:20:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:12,514 INFO L93 Difference]: Finished difference Result 146130 states and 421362 transitions. [2021-04-15 05:20:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:20:12,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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 43 [2021-04-15 05:20:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:12,857 INFO L225 Difference]: With dead ends: 146130 [2021-04-15 05:20:12,857 INFO L226 Difference]: Without dead ends: 146118 [2021-04-15 05:20:12,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:20:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146118 states. [2021-04-15 05:20:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146118 to 118510. [2021-04-15 05:20:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118510 states, 118509 states have (on average 2.9064037330498107) internal successors, (344435), 118509 states have internal predecessors, (344435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118510 states to 118510 states and 344435 transitions. [2021-04-15 05:20:16,596 INFO L78 Accepts]: Start accepts. Automaton has 118510 states and 344435 transitions. Word has length 43 [2021-04-15 05:20:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:16,596 INFO L480 AbstractCegarLoop]: Abstraction has 118510 states and 344435 transitions. [2021-04-15 05:20:16,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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) [2021-04-15 05:20:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 118510 states and 344435 transitions. [2021-04-15 05:20:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:16,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:16,839 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:17,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:17,039 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 981002536, now seen corresponding path program 182 times [2021-04-15 05:20:17,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:17,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565761054] [2021-04-15 05:20:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:17,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565761054] [2021-04-15 05:20:17,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927576091] [2021-04-15 05:20:17,084 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:17,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:20:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:17,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:17,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:17,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:20:17,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95530531] [2021-04-15 05:20:17,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:20:17,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:20:17,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:20:17,239 INFO L87 Difference]: Start difference. First operand 118510 states and 344435 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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) [2021-04-15 05:20:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:18,613 INFO L93 Difference]: Finished difference Result 143239 states and 413544 transitions. [2021-04-15 05:20:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:20:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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 43 [2021-04-15 05:20:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:18,908 INFO L225 Difference]: With dead ends: 143239 [2021-04-15 05:20:18,909 INFO L226 Difference]: Without dead ends: 143239 [2021-04-15 05:20:18,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 611.4ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:20:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143239 states. [2021-04-15 05:20:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143239 to 124722. [2021-04-15 05:20:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124722 states, 124721 states have (on average 2.9106966749785523) internal successors, (363025), 124721 states have internal predecessors, (363025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124722 states to 124722 states and 363025 transitions. [2021-04-15 05:20:22,567 INFO L78 Accepts]: Start accepts. Automaton has 124722 states and 363025 transitions. Word has length 43 [2021-04-15 05:20:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:22,567 INFO L480 AbstractCegarLoop]: Abstraction has 124722 states and 363025 transitions. [2021-04-15 05:20:22,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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) [2021-04-15 05:20:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 124722 states and 363025 transitions. [2021-04-15 05:20:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:22,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:22,772 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:22,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:22,973 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1122086154, now seen corresponding path program 183 times [2021-04-15 05:20:22,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:22,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098967192] [2021-04-15 05:20:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:20:23,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098967192] [2021-04-15 05:20:23,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925841306] [2021-04-15 05:20:23,031 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:23,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:20:23,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:23,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:23,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:23,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:20:23,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460290551] [2021-04-15 05:20:23,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:20:23,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:23,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:20:23,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:20:23,215 INFO L87 Difference]: Start difference. First operand 124722 states and 363025 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:25,064 INFO L93 Difference]: Finished difference Result 138897 states and 401745 transitions. [2021-04-15 05:20:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 05:20:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:20:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:25,393 INFO L225 Difference]: With dead ends: 138897 [2021-04-15 05:20:25,393 INFO L226 Difference]: Without dead ends: 138876 [2021-04-15 05:20:25,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:20:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138876 states. [2021-04-15 05:20:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138876 to 110056. [2021-04-15 05:20:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110056 states, 110055 states have (on average 2.902385171050838) internal successors, (319422), 110055 states have internal predecessors, (319422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110056 states to 110056 states and 319422 transitions. [2021-04-15 05:20:28,412 INFO L78 Accepts]: Start accepts. Automaton has 110056 states and 319422 transitions. Word has length 43 [2021-04-15 05:20:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:28,412 INFO L480 AbstractCegarLoop]: Abstraction has 110056 states and 319422 transitions. [2021-04-15 05:20:28,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 110056 states and 319422 transitions. [2021-04-15 05:20:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:28,581 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:28,581 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:28,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-04-15 05:20:28,790 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:28,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1206484928, now seen corresponding path program 184 times [2021-04-15 05:20:28,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:28,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781276643] [2021-04-15 05:20:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781276643] [2021-04-15 05:20:28,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905166741] [2021-04-15 05:20:28,846 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:28,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:20:28,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:28,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:28,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:28,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:28,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:20:28,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532560725] [2021-04-15 05:20:28,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:20:28,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:20:28,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:20:28,998 INFO L87 Difference]: Start difference. First operand 110056 states and 319422 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:30,565 INFO L93 Difference]: Finished difference Result 127374 states and 367364 transitions. [2021-04-15 05:20:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:20:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:20:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:30,851 INFO L225 Difference]: With dead ends: 127374 [2021-04-15 05:20:30,851 INFO L226 Difference]: Without dead ends: 127318 [2021-04-15 05:20:30,852 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:20:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127318 states. [2021-04-15 05:20:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127318 to 108532. [2021-04-15 05:20:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108532 states, 108531 states have (on average 2.907795929273664) internal successors, (315586), 108531 states have internal predecessors, (315586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108532 states to 108532 states and 315586 transitions. [2021-04-15 05:20:33,722 INFO L78 Accepts]: Start accepts. Automaton has 108532 states and 315586 transitions. Word has length 43 [2021-04-15 05:20:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:33,722 INFO L480 AbstractCegarLoop]: Abstraction has 108532 states and 315586 transitions. [2021-04-15 05:20:33,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 108532 states and 315586 transitions. [2021-04-15 05:20:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:33,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:33,933 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:34,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:34,156 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1475403872, now seen corresponding path program 185 times [2021-04-15 05:20:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:34,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709902476] [2021-04-15 05:20:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:34,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709902476] [2021-04-15 05:20:34,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600821049] [2021-04-15 05:20:34,223 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:34,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:20:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:34,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:34,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:20:34,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016155204] [2021-04-15 05:20:34,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:20:34,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:34,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:20:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:20:34,406 INFO L87 Difference]: Start difference. First operand 108532 states and 315586 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:36,019 INFO L93 Difference]: Finished difference Result 118383 states and 342092 transitions. [2021-04-15 05:20:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:20:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:20:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:36,296 INFO L225 Difference]: With dead ends: 118383 [2021-04-15 05:20:36,296 INFO L226 Difference]: Without dead ends: 118317 [2021-04-15 05:20:36,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:20:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118317 states. [2021-04-15 05:20:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118317 to 107352. [2021-04-15 05:20:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107352 states, 107351 states have (on average 2.907192294436009) internal successors, (312090), 107351 states have internal predecessors, (312090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107352 states to 107352 states and 312090 transitions. [2021-04-15 05:20:39,013 INFO L78 Accepts]: Start accepts. Automaton has 107352 states and 312090 transitions. Word has length 43 [2021-04-15 05:20:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:39,013 INFO L480 AbstractCegarLoop]: Abstraction has 107352 states and 312090 transitions. [2021-04-15 05:20:39,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 107352 states and 312090 transitions. [2021-04-15 05:20:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:39,151 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:39,151 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:39,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-04-15 05:20:39,352 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1857040322, now seen corresponding path program 186 times [2021-04-15 05:20:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:39,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31949341] [2021-04-15 05:20:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:39,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31949341] [2021-04-15 05:20:39,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210287334] [2021-04-15 05:20:39,404 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:20:39,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:20:39,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:39,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:39,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-04-15 05:20:39,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718602494] [2021-04-15 05:20:39,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:20:39,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:20:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:20:39,588 INFO L87 Difference]: Start difference. First operand 107352 states and 312090 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:40,767 INFO L93 Difference]: Finished difference Result 131564 states and 379356 transitions. [2021-04-15 05:20:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:20:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:20:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:41,072 INFO L225 Difference]: With dead ends: 131564 [2021-04-15 05:20:41,072 INFO L226 Difference]: Without dead ends: 131534 [2021-04-15 05:20:41,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:20:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131534 states. [2021-04-15 05:20:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131534 to 108868. [2021-04-15 05:20:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108868 states, 108867 states have (on average 2.9046267463969797) internal successors, (316218), 108867 states have internal predecessors, (316218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108868 states to 108868 states and 316218 transitions. [2021-04-15 05:20:43,901 INFO L78 Accepts]: Start accepts. Automaton has 108868 states and 316218 transitions. Word has length 43 [2021-04-15 05:20:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:43,901 INFO L480 AbstractCegarLoop]: Abstraction has 108868 states and 316218 transitions. [2021-04-15 05:20:43,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 108868 states and 316218 transitions. [2021-04-15 05:20:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:44,056 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:44,056 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:44,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:44,257 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash 228319968, now seen corresponding path program 187 times [2021-04-15 05:20:44,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:44,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636332153] [2021-04-15 05:20:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:44,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636332153] [2021-04-15 05:20:44,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123347527] [2021-04-15 05:20:44,296 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:44,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:44,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:44,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-04-15 05:20:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633000148] [2021-04-15 05:20:44,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:20:44,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:20:44,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:20:44,948 INFO L87 Difference]: Start difference. First operand 108868 states and 316218 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:46,312 INFO L93 Difference]: Finished difference Result 147839 states and 426243 transitions. [2021-04-15 05:20:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 05:20:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:20:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:46,656 INFO L225 Difference]: With dead ends: 147839 [2021-04-15 05:20:46,656 INFO L226 Difference]: Without dead ends: 147833 [2021-04-15 05:20:46,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 05:20:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147833 states. [2021-04-15 05:20:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147833 to 114810. [2021-04-15 05:20:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114810 states, 114809 states have (on average 2.9023421508766734) internal successors, (333215), 114809 states have internal predecessors, (333215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114810 states to 114810 states and 333215 transitions. [2021-04-15 05:20:49,630 INFO L78 Accepts]: Start accepts. Automaton has 114810 states and 333215 transitions. Word has length 43 [2021-04-15 05:20:49,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:49,630 INFO L480 AbstractCegarLoop]: Abstraction has 114810 states and 333215 transitions. [2021-04-15 05:20:49,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 114810 states and 333215 transitions. [2021-04-15 05:20:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:50,311 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:50,311 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:50,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:50,533 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1707881602, now seen corresponding path program 188 times [2021-04-15 05:20:50,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:50,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873094162] [2021-04-15 05:20:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:50,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873094162] [2021-04-15 05:20:50,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244967372] [2021-04-15 05:20:50,586 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:20:50,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:20:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:50,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:50,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-04-15 05:20:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222118300] [2021-04-15 05:20:50,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:20:50,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:20:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:20:50,784 INFO L87 Difference]: Start difference. First operand 114810 states and 333215 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:52,215 INFO L93 Difference]: Finished difference Result 151597 states and 435976 transitions. [2021-04-15 05:20:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 05:20:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 05:20:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:52,547 INFO L225 Difference]: With dead ends: 151597 [2021-04-15 05:20:52,547 INFO L226 Difference]: Without dead ends: 151597 [2021-04-15 05:20:52,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 05:20:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151597 states. [2021-04-15 05:20:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151597 to 124310. [2021-04-15 05:20:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124310 states, 124309 states have (on average 2.9047856551014006) internal successors, (361091), 124309 states have internal predecessors, (361091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124310 states to 124310 states and 361091 transitions. [2021-04-15 05:20:56,137 INFO L78 Accepts]: Start accepts. Automaton has 124310 states and 361091 transitions. Word has length 43 [2021-04-15 05:20:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:56,137 INFO L480 AbstractCegarLoop]: Abstraction has 124310 states and 361091 transitions. [2021-04-15 05:20:56,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 124310 states and 361091 transitions. [2021-04-15 05:20:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:20:56,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:56,300 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:20:56,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-04-15 05:20:56,501 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:56,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:56,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1848965220, now seen corresponding path program 189 times [2021-04-15 05:20:56,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:56,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679652911] [2021-04-15 05:20:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:20:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679652911] [2021-04-15 05:20:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640699537] [2021-04-15 05:20:56,540 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:56,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:20:56,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:56,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:20:56,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:56,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:56,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-04-15 05:20:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095447187] [2021-04-15 05:20:56,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:20:56,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:56,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:20:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:20:56,710 INFO L87 Difference]: Start difference. First operand 124310 states and 361091 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:58,449 INFO L93 Difference]: Finished difference Result 147763 states and 425526 transitions. [2021-04-15 05:20:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:20:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:20:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:58,759 INFO L225 Difference]: With dead ends: 147763 [2021-04-15 05:20:58,759 INFO L226 Difference]: Without dead ends: 147742 [2021-04-15 05:20:58,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:20:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147742 states. [2021-04-15 05:21:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147742 to 118770. [2021-04-15 05:21:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118770 states, 118769 states have (on average 2.8996034318719532) internal successors, (344383), 118769 states have internal predecessors, (344383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118770 states to 118770 states and 344383 transitions. [2021-04-15 05:21:01,588 INFO L78 Accepts]: Start accepts. Automaton has 118770 states and 344383 transitions. Word has length 43 [2021-04-15 05:21:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:01,588 INFO L480 AbstractCegarLoop]: Abstraction has 118770 states and 344383 transitions. [2021-04-15 05:21:01,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 118770 states and 344383 transitions. [2021-04-15 05:21:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:01,761 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:01,761 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:01,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-04-15 05:21:01,961 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1933363994, now seen corresponding path program 190 times [2021-04-15 05:21:01,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:01,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880521551] [2021-04-15 05:21:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:21:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880521551] [2021-04-15 05:21:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966617751] [2021-04-15 05:21:02,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:02,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:21:02,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:02,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:02,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-04-15 05:21:02,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540814635] [2021-04-15 05:21:02,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:21:02,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:02,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:21:02,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:21:02,178 INFO L87 Difference]: Start difference. First operand 118770 states and 344383 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:03,933 INFO L93 Difference]: Finished difference Result 146285 states and 420637 transitions. [2021-04-15 05:21:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:21:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:21:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:04,249 INFO L225 Difference]: With dead ends: 146285 [2021-04-15 05:21:04,249 INFO L226 Difference]: Without dead ends: 146201 [2021-04-15 05:21:04,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:21:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146201 states. [2021-04-15 05:21:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146201 to 117655. [2021-04-15 05:21:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117655 states, 117654 states have (on average 2.900921345640607) internal successors, (341305), 117654 states have internal predecessors, (341305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117655 states to 117655 states and 341305 transitions. [2021-04-15 05:21:07,176 INFO L78 Accepts]: Start accepts. Automaton has 117655 states and 341305 transitions. Word has length 43 [2021-04-15 05:21:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:07,176 INFO L480 AbstractCegarLoop]: Abstraction has 117655 states and 341305 transitions. [2021-04-15 05:21:07,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 117655 states and 341305 transitions. [2021-04-15 05:21:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:07,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:07,350 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:07,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-04-15 05:21:07,550 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -721565792, now seen corresponding path program 191 times [2021-04-15 05:21:07,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:07,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768300300] [2021-04-15 05:21:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:07,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768300300] [2021-04-15 05:21:07,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785489317] [2021-04-15 05:21:07,601 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:07,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 05:21:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:07,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:07,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:07,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:21:07,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299784524] [2021-04-15 05:21:07,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:21:07,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:07,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:21:07,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:21:07,805 INFO L87 Difference]: Start difference. First operand 117655 states and 341305 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:08,734 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-04-15 05:21:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:09,479 INFO L93 Difference]: Finished difference Result 145865 states and 419264 transitions. [2021-04-15 05:21:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:21:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:21:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:09,769 INFO L225 Difference]: With dead ends: 145865 [2021-04-15 05:21:09,769 INFO L226 Difference]: Without dead ends: 145767 [2021-04-15 05:21:09,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1019.2ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:21:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145767 states. [2021-04-15 05:21:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145767 to 119378. [2021-04-15 05:21:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119378 states, 119377 states have (on average 2.90281209948315) internal successors, (346529), 119377 states have internal predecessors, (346529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119378 states to 119378 states and 346529 transitions. [2021-04-15 05:21:12,803 INFO L78 Accepts]: Start accepts. Automaton has 119378 states and 346529 transitions. Word has length 43 [2021-04-15 05:21:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:12,803 INFO L480 AbstractCegarLoop]: Abstraction has 119378 states and 346529 transitions. [2021-04-15 05:21:12,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 119378 states and 346529 transitions. [2021-04-15 05:21:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:12,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:12,973 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:13,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:13,174 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:13,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1517368606, now seen corresponding path program 192 times [2021-04-15 05:21:13,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:13,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955836709] [2021-04-15 05:21:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:13,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955836709] [2021-04-15 05:21:13,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779828671] [2021-04-15 05:21:13,253 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:13,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:21:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:13,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:13,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:13,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:21:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927611627] [2021-04-15 05:21:13,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:21:13,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:13,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:21:13,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:21:13,454 INFO L87 Difference]: Start difference. First operand 119378 states and 346529 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:15,189 INFO L93 Difference]: Finished difference Result 132585 states and 382534 transitions. [2021-04-15 05:21:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:21:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:21:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:15,466 INFO L225 Difference]: With dead ends: 132585 [2021-04-15 05:21:15,466 INFO L226 Difference]: Without dead ends: 132519 [2021-04-15 05:21:15,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1106.9ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:21:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132519 states. [2021-04-15 05:21:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132519 to 121218. [2021-04-15 05:21:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121218 states, 121217 states have (on average 2.89966753838158) internal successors, (351489), 121217 states have internal predecessors, (351489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121218 states to 121218 states and 351489 transitions. [2021-04-15 05:21:18,333 INFO L78 Accepts]: Start accepts. Automaton has 121218 states and 351489 transitions. Word has length 43 [2021-04-15 05:21:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:18,333 INFO L480 AbstractCegarLoop]: Abstraction has 121218 states and 351489 transitions. [2021-04-15 05:21:18,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 121218 states and 351489 transitions. [2021-04-15 05:21:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:18,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:18,503 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:18,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-04-15 05:21:18,704 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:18,704 INFO L82 PathProgramCache]: Analyzing trace with hash 826070824, now seen corresponding path program 193 times [2021-04-15 05:21:18,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:18,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860997619] [2021-04-15 05:21:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:18,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860997619] [2021-04-15 05:21:18,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208436879] [2021-04-15 05:21:18,747 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:18,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:18,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 05:21:18,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054906778] [2021-04-15 05:21:18,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:21:18,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:18,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:21:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:21:18,927 INFO L87 Difference]: Start difference. First operand 121218 states and 351489 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:20,803 INFO L93 Difference]: Finished difference Result 149723 states and 431009 transitions. [2021-04-15 05:21:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:21:20,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:21:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:21,107 INFO L225 Difference]: With dead ends: 149723 [2021-04-15 05:21:21,107 INFO L226 Difference]: Without dead ends: 149693 [2021-04-15 05:21:21,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:21:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149693 states. [2021-04-15 05:21:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149693 to 126786. [2021-04-15 05:21:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126786 states, 126785 states have (on average 2.8991836573727174) internal successors, (367573), 126785 states have internal predecessors, (367573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126786 states to 126786 states and 367573 transitions. [2021-04-15 05:21:24,301 INFO L78 Accepts]: Start accepts. Automaton has 126786 states and 367573 transitions. Word has length 43 [2021-04-15 05:21:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:24,301 INFO L480 AbstractCegarLoop]: Abstraction has 126786 states and 367573 transitions. [2021-04-15 05:21:24,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 126786 states and 367573 transitions. [2021-04-15 05:21:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:25,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:25,020 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:25,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:25,221 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:25,221 INFO L82 PathProgramCache]: Analyzing trace with hash -11435682, now seen corresponding path program 194 times [2021-04-15 05:21:25,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:25,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384641363] [2021-04-15 05:21:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:25,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384641363] [2021-04-15 05:21:25,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698037236] [2021-04-15 05:21:25,258 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:25,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:21:25,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:25,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:25,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-04-15 05:21:25,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179662050] [2021-04-15 05:21:25,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:21:25,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:25,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:21:25,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:21:25,431 INFO L87 Difference]: Start difference. First operand 126786 states and 367573 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:26,922 INFO L93 Difference]: Finished difference Result 166212 states and 479147 transitions. [2021-04-15 05:21:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 05:21:26,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:21:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:27,292 INFO L225 Difference]: With dead ends: 166212 [2021-04-15 05:21:27,292 INFO L226 Difference]: Without dead ends: 166206 [2021-04-15 05:21:27,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:21:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166206 states. [2021-04-15 05:21:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166206 to 136796. [2021-04-15 05:21:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136796 states, 136795 states have (on average 2.897576665813809) internal successors, (396374), 136795 states have internal predecessors, (396374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136796 states to 136796 states and 396374 transitions. [2021-04-15 05:21:30,978 INFO L78 Accepts]: Start accepts. Automaton has 136796 states and 396374 transitions. Word has length 43 [2021-04-15 05:21:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:30,978 INFO L480 AbstractCegarLoop]: Abstraction has 136796 states and 396374 transitions. [2021-04-15 05:21:30,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 136796 states and 396374 transitions. [2021-04-15 05:21:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:31,176 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:31,176 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:31,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:31,377 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash 937030376, now seen corresponding path program 195 times [2021-04-15 05:21:31,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:31,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84140589] [2021-04-15 05:21:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:31,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84140589] [2021-04-15 05:21:31,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3410453] [2021-04-15 05:21:31,412 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:21:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:31,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:31,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-04-15 05:21:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693002739] [2021-04-15 05:21:31,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:21:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:21:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:21:31,586 INFO L87 Difference]: Start difference. First operand 136796 states and 396374 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:33,018 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-04-15 05:21:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:33,737 INFO L93 Difference]: Finished difference Result 194581 states and 559988 transitions. [2021-04-15 05:21:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:21:33,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:21:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:34,167 INFO L225 Difference]: With dead ends: 194581 [2021-04-15 05:21:34,167 INFO L226 Difference]: Without dead ends: 194581 [2021-04-15 05:21:34,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 1283.8ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:21:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194581 states. [2021-04-15 05:21:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194581 to 170412. [2021-04-15 05:21:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170412 states, 170411 states have (on average 2.8939563760555362) internal successors, (493162), 170411 states have internal predecessors, (493162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170412 states to 170412 states and 493162 transitions. [2021-04-15 05:21:38,423 INFO L78 Accepts]: Start accepts. Automaton has 170412 states and 493162 transitions. Word has length 43 [2021-04-15 05:21:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:38,423 INFO L480 AbstractCegarLoop]: Abstraction has 170412 states and 493162 transitions. [2021-04-15 05:21:38,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 170412 states and 493162 transitions. [2021-04-15 05:21:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:39,329 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:39,329 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:39,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:39,561 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:39,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1078113994, now seen corresponding path program 196 times [2021-04-15 05:21:39,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:39,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983221566] [2021-04-15 05:21:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:21:39,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983221566] [2021-04-15 05:21:39,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99826980] [2021-04-15 05:21:39,594 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:39,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:21:39,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:39,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:39,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-04-15 05:21:39,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76456343] [2021-04-15 05:21:39,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:21:39,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:21:39,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:21:39,765 INFO L87 Difference]: Start difference. First operand 170412 states and 493162 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2021-04-15 05:21:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:41,855 INFO L93 Difference]: Finished difference Result 192318 states and 553530 transitions. [2021-04-15 05:21:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:21:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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 43 [2021-04-15 05:21:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:42,417 INFO L225 Difference]: With dead ends: 192318 [2021-04-15 05:21:42,417 INFO L226 Difference]: Without dead ends: 192304 [2021-04-15 05:21:42,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:21:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192304 states. [2021-04-15 05:21:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192304 to 168920. [2021-04-15 05:21:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168920 states, 168919 states have (on average 2.8928658114244103) internal successors, (488660), 168919 states have internal predecessors, (488660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168920 states to 168920 states and 488660 transitions. [2021-04-15 05:21:46,817 INFO L78 Accepts]: Start accepts. Automaton has 168920 states and 488660 transitions. Word has length 43 [2021-04-15 05:21:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:46,817 INFO L480 AbstractCegarLoop]: Abstraction has 168920 states and 488660 transitions. [2021-04-15 05:21:46,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2021-04-15 05:21:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 168920 states and 488660 transitions. [2021-04-15 05:21:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:47,050 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:47,050 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:47,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:47,251 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1162512768, now seen corresponding path program 197 times [2021-04-15 05:21:47,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:47,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785847962] [2021-04-15 05:21:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:21:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785847962] [2021-04-15 05:21:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127820443] [2021-04-15 05:21:47,293 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:47,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:21:47,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:47,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:47,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:47,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-04-15 05:21:47,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825164144] [2021-04-15 05:21:47,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:21:47,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:21:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:21:47,468 INFO L87 Difference]: Start difference. First operand 168920 states and 488660 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2021-04-15 05:21:48,705 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-04-15 05:21:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:49,571 INFO L93 Difference]: Finished difference Result 193841 states and 557822 transitions. [2021-04-15 05:21:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 05:21:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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 43 [2021-04-15 05:21:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:49,996 INFO L225 Difference]: With dead ends: 193841 [2021-04-15 05:21:49,996 INFO L226 Difference]: Without dead ends: 193785 [2021-04-15 05:21:49,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1246.5ms TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:21:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193785 states. [2021-04-15 05:21:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193785 to 172056. [2021-04-15 05:21:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172056 states, 172055 states have (on average 2.891900845659818) internal successors, (497566), 172055 states have internal predecessors, (497566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172056 states to 172056 states and 497566 transitions. [2021-04-15 05:21:54,315 INFO L78 Accepts]: Start accepts. Automaton has 172056 states and 497566 transitions. Word has length 43 [2021-04-15 05:21:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:54,315 INFO L480 AbstractCegarLoop]: Abstraction has 172056 states and 497566 transitions. [2021-04-15 05:21:54,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2021-04-15 05:21:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 172056 states and 497566 transitions. [2021-04-15 05:21:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:21:55,344 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:55,345 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:21:55,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:55,561 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1492417018, now seen corresponding path program 198 times [2021-04-15 05:21:55,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:55,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668876383] [2021-04-15 05:21:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:21:55,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668876383] [2021-04-15 05:21:55,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459082832] [2021-04-15 05:21:55,609 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:55,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:21:55,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:55,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:21:55,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:55,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:55,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 05:21:55,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142369688] [2021-04-15 05:21:55,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:21:55,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:55,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:21:55,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:21:55,788 INFO L87 Difference]: Start difference. First operand 172056 states and 497566 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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) [2021-04-15 05:21:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:57,244 INFO L93 Difference]: Finished difference Result 200685 states and 577316 transitions. [2021-04-15 05:21:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:21:57,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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 43 [2021-04-15 05:21:57,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:57,725 INFO L225 Difference]: With dead ends: 200685 [2021-04-15 05:21:57,725 INFO L226 Difference]: Without dead ends: 200587 [2021-04-15 05:21:57,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:21:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200587 states. [2021-04-15 05:22:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200587 to 178420. [2021-04-15 05:22:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178420 states, 178419 states have (on average 2.8910037608102277) internal successors, (515810), 178419 states have internal predecessors, (515810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178420 states to 178420 states and 515810 transitions. [2021-04-15 05:22:02,778 INFO L78 Accepts]: Start accepts. Automaton has 178420 states and 515810 transitions. Word has length 43 [2021-04-15 05:22:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:02,778 INFO L480 AbstractCegarLoop]: Abstraction has 178420 states and 515810 transitions. [2021-04-15 05:22:02,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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) [2021-04-15 05:22:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 178420 states and 515810 transitions. [2021-04-15 05:22:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 05:22:03,047 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:03,047 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-04-15 05:22:03,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:03,248 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:03,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1612051392, now seen corresponding path program 199 times [2021-04-15 05:22:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:03,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041499080] [2021-04-15 05:22:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041499080] [2021-04-15 05:22:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009030086] [2021-04-15 05:22:03,303 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:22:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:03,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:03,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:22:03,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036860662] [2021-04-15 05:22:03,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:22:03,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:22:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:22:03,490 INFO L87 Difference]: Start difference. First operand 178420 states and 515810 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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) [2021-04-15 05:22:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:05,617 INFO L93 Difference]: Finished difference Result 203904 states and 586720 transitions. [2021-04-15 05:22:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:22:05,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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 43 [2021-04-15 05:22:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:06,145 INFO L225 Difference]: With dead ends: 203904 [2021-04-15 05:22:06,146 INFO L226 Difference]: Without dead ends: 203764 [2021-04-15 05:22:06,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:22:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203764 states. [2021-04-15 05:22:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203764 to 182041. [2021-04-15 05:22:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182041 states, 182040 states have (on average 2.890210942649967) internal successors, (526134), 182040 states have internal predecessors, (526134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182041 states to 182041 states and 526134 transitions. [2021-04-15 05:22:10,507 INFO L78 Accepts]: Start accepts. Automaton has 182041 states and 526134 transitions. Word has length 43 [2021-04-15 05:22:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:10,508 INFO L480 AbstractCegarLoop]: Abstraction has 182041 states and 526134 transitions. [2021-04-15 05:22:10,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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) [2021-04-15 05:22:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 182041 states and 526134 transitions. [2021-04-15 05:22:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:22:10,794 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:10,794 INFO L551 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] [2021-04-15 05:22:10,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-04-15 05:22:10,995 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:10,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:10,995 INFO L82 PathProgramCache]: Analyzing trace with hash 993831136, now seen corresponding path program 200 times [2021-04-15 05:22:10,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:10,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326251698] [2021-04-15 05:22:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326251698] [2021-04-15 05:22:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405410530] [2021-04-15 05:22:11,237 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:11,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:22:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:11,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:22:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:12,004 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2021-04-15 05:22:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:12,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:12,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 22 [2021-04-15 05:22:12,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717880254] [2021-04-15 05:22:12,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:22:12,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:22:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:22:12,346 INFO L87 Difference]: Start difference. First operand 182041 states and 526134 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:13,600 INFO L93 Difference]: Finished difference Result 248139 states and 714731 transitions. [2021-04-15 05:22:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:22:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:22:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:14,200 INFO L225 Difference]: With dead ends: 248139 [2021-04-15 05:22:14,200 INFO L226 Difference]: Without dead ends: 248101 [2021-04-15 05:22:14,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:22:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248101 states. [2021-04-15 05:22:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248101 to 182069. [2021-04-15 05:22:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182069 states, 182068 states have (on average 2.890096008084891) internal successors, (526194), 182068 states have internal predecessors, (526194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182069 states to 182069 states and 526194 transitions. [2021-04-15 05:22:19,615 INFO L78 Accepts]: Start accepts. Automaton has 182069 states and 526194 transitions. Word has length 46 [2021-04-15 05:22:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:19,615 INFO L480 AbstractCegarLoop]: Abstraction has 182069 states and 526194 transitions. [2021-04-15 05:22:19,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 182069 states and 526194 transitions. [2021-04-15 05:22:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:22:19,896 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:19,896 INFO L551 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] [2021-04-15 05:22:20,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:20,097 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash -290942774, now seen corresponding path program 201 times [2021-04-15 05:22:20,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:20,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527002541] [2021-04-15 05:22:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527002541] [2021-04-15 05:22:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774422067] [2021-04-15 05:22:20,333 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:20,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:22:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:22:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:20,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:20,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-04-15 05:22:20,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818892613] [2021-04-15 05:22:20,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:22:20,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:20,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:22:20,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:22:20,643 INFO L87 Difference]: Start difference. First operand 182069 states and 526194 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:23,097 INFO L93 Difference]: Finished difference Result 270945 states and 781071 transitions. [2021-04-15 05:22:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:22:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:22:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:23,769 INFO L225 Difference]: With dead ends: 270945 [2021-04-15 05:22:23,770 INFO L226 Difference]: Without dead ends: 270863 [2021-04-15 05:22:23,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:22:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270863 states. [2021-04-15 05:22:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270863 to 202438. [2021-04-15 05:22:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202438 states, 202437 states have (on average 2.8933544757134317) internal successors, (585722), 202437 states have internal predecessors, (585722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202438 states to 202438 states and 585722 transitions. [2021-04-15 05:22:29,553 INFO L78 Accepts]: Start accepts. Automaton has 202438 states and 585722 transitions. Word has length 46 [2021-04-15 05:22:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:29,553 INFO L480 AbstractCegarLoop]: Abstraction has 202438 states and 585722 transitions. [2021-04-15 05:22:29,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 202438 states and 585722 transitions. [2021-04-15 05:22:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:22:29,873 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:29,873 INFO L551 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] [2021-04-15 05:22:30,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-04-15 05:22:30,073 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 305163142, now seen corresponding path program 202 times [2021-04-15 05:22:30,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:30,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361883999] [2021-04-15 05:22:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:30,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361883999] [2021-04-15 05:22:30,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175881681] [2021-04-15 05:22:30,260 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:30,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:22:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:22:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:30,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:30,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-04-15 05:22:30,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380404565] [2021-04-15 05:22:30,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:22:30,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:22:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:22:30,565 INFO L87 Difference]: Start difference. First operand 202438 states and 585722 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:32,950 INFO L93 Difference]: Finished difference Result 270914 states and 781003 transitions. [2021-04-15 05:22:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:22:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:22:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:33,667 INFO L225 Difference]: With dead ends: 270914 [2021-04-15 05:22:33,668 INFO L226 Difference]: Without dead ends: 270802 [2021-04-15 05:22:33,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:22:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270802 states. [2021-04-15 05:22:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270802 to 199094. [2021-04-15 05:22:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199094 states, 199093 states have (on average 2.890920323667834) internal successors, (575562), 199093 states have internal predecessors, (575562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199094 states to 199094 states and 575562 transitions. [2021-04-15 05:22:39,442 INFO L78 Accepts]: Start accepts. Automaton has 199094 states and 575562 transitions. Word has length 46 [2021-04-15 05:22:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:39,443 INFO L480 AbstractCegarLoop]: Abstraction has 199094 states and 575562 transitions. [2021-04-15 05:22:39,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 199094 states and 575562 transitions. [2021-04-15 05:22:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:22:39,764 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:39,764 INFO L551 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] [2021-04-15 05:22:39,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-04-15 05:22:39,965 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -752360386, now seen corresponding path program 203 times [2021-04-15 05:22:39,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:39,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152067286] [2021-04-15 05:22:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:40,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152067286] [2021-04-15 05:22:40,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501074384] [2021-04-15 05:22:40,210 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:40,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:22:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:22:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:40,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:40,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-04-15 05:22:40,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596433815] [2021-04-15 05:22:40,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:22:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:22:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:22:40,556 INFO L87 Difference]: Start difference. First operand 199094 states and 575562 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:42,866 INFO L93 Difference]: Finished difference Result 271089 states and 781313 transitions. [2021-04-15 05:22:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:22:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:22:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:43,508 INFO L225 Difference]: With dead ends: 271089 [2021-04-15 05:22:43,508 INFO L226 Difference]: Without dead ends: 270965 [2021-04-15 05:22:43,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:22:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270965 states. [2021-04-15 05:22:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270965 to 200986. [2021-04-15 05:22:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200986 states, 200985 states have (on average 2.8915192676070354) internal successors, (581152), 200985 states have internal predecessors, (581152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200986 states to 200986 states and 581152 transitions. [2021-04-15 05:22:50,193 INFO L78 Accepts]: Start accepts. Automaton has 200986 states and 581152 transitions. Word has length 46 [2021-04-15 05:22:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:50,194 INFO L480 AbstractCegarLoop]: Abstraction has 200986 states and 581152 transitions. [2021-04-15 05:22:50,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 200986 states and 581152 transitions. [2021-04-15 05:22:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:22:50,499 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:50,499 INFO L551 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] [2021-04-15 05:22:50,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-04-15 05:22:50,699 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 426214436, now seen corresponding path program 204 times [2021-04-15 05:22:50,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:50,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443334027] [2021-04-15 05:22:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:50,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443334027] [2021-04-15 05:22:50,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650296927] [2021-04-15 05:22:50,899 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:50,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:22:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:22:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:51,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:51,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-04-15 05:22:51,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107695548] [2021-04-15 05:22:51,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:22:51,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:22:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:22:51,206 INFO L87 Difference]: Start difference. First operand 200986 states and 581152 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:53,443 INFO L93 Difference]: Finished difference Result 271554 states and 782535 transitions. [2021-04-15 05:22:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:22:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:22:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:54,083 INFO L225 Difference]: With dead ends: 271554 [2021-04-15 05:22:54,083 INFO L226 Difference]: Without dead ends: 271424 [2021-04-15 05:22:54,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:22:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271424 states. [2021-04-15 05:22:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271424 to 202610. [2021-04-15 05:22:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202610 states, 202609 states have (on average 2.8921716212014275) internal successors, (585980), 202609 states have internal predecessors, (585980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202610 states to 202610 states and 585980 transitions. [2021-04-15 05:23:00,077 INFO L78 Accepts]: Start accepts. Automaton has 202610 states and 585980 transitions. Word has length 46 [2021-04-15 05:23:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:00,077 INFO L480 AbstractCegarLoop]: Abstraction has 202610 states and 585980 transitions. [2021-04-15 05:23:00,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 202610 states and 585980 transitions. [2021-04-15 05:23:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:23:00,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:00,390 INFO L551 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] [2021-04-15 05:23:00,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-04-15 05:23:00,591 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash -8908162, now seen corresponding path program 205 times [2021-04-15 05:23:00,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:00,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879900900] [2021-04-15 05:23:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879900900] [2021-04-15 05:23:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969627657] [2021-04-15 05:23:00,807 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:23:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:01,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:01,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-04-15 05:23:01,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534602906] [2021-04-15 05:23:01,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:23:01,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:01,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:23:01,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:23:01,090 INFO L87 Difference]: Start difference. First operand 202610 states and 585980 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:03,197 INFO L93 Difference]: Finished difference Result 271538 states and 782566 transitions. [2021-04-15 05:23:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:23:03,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:23:03,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:03,894 INFO L225 Difference]: With dead ends: 271538 [2021-04-15 05:23:03,894 INFO L226 Difference]: Without dead ends: 271462 [2021-04-15 05:23:03,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:23:04,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271462 states. [2021-04-15 05:23:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271462 to 203498. [2021-04-15 05:23:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203498 states, 203497 states have (on average 2.892209713165305) internal successors, (588556), 203497 states have internal predecessors, (588556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203498 states to 203498 states and 588556 transitions. [2021-04-15 05:23:09,655 INFO L78 Accepts]: Start accepts. Automaton has 203498 states and 588556 transitions. Word has length 46 [2021-04-15 05:23:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:09,655 INFO L480 AbstractCegarLoop]: Abstraction has 203498 states and 588556 transitions. [2021-04-15 05:23:09,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 203498 states and 588556 transitions. [2021-04-15 05:23:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:23:09,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:09,981 INFO L551 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] [2021-04-15 05:23:10,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-04-15 05:23:10,181 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:10,182 INFO L82 PathProgramCache]: Analyzing trace with hash -534925852, now seen corresponding path program 206 times [2021-04-15 05:23:10,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:10,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091909640] [2021-04-15 05:23:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:10,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091909640] [2021-04-15 05:23:10,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162589643] [2021-04-15 05:23:10,439 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:10,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:23:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:10,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:23:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:10,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:10,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-04-15 05:23:10,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768412556] [2021-04-15 05:23:10,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:23:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:23:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:23:10,743 INFO L87 Difference]: Start difference. First operand 203498 states and 588556 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:12,847 INFO L93 Difference]: Finished difference Result 271399 states and 782277 transitions. [2021-04-15 05:23:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:23:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:23:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:13,522 INFO L225 Difference]: With dead ends: 271399 [2021-04-15 05:23:13,522 INFO L226 Difference]: Without dead ends: 271361 [2021-04-15 05:23:13,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:23:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271361 states. [2021-04-15 05:23:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271361 to 203520. [2021-04-15 05:23:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203520 states, 203519 states have (on average 2.8922164515352375) internal successors, (588621), 203519 states have internal predecessors, (588621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203520 states to 203520 states and 588621 transitions. [2021-04-15 05:23:19,403 INFO L78 Accepts]: Start accepts. Automaton has 203520 states and 588621 transitions. Word has length 46 [2021-04-15 05:23:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:19,403 INFO L480 AbstractCegarLoop]: Abstraction has 203520 states and 588621 transitions. [2021-04-15 05:23:19,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 203520 states and 588621 transitions. [2021-04-15 05:23:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:23:19,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:19,757 INFO L551 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] [2021-04-15 05:23:19,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:19,958 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash 250764184, now seen corresponding path program 207 times [2021-04-15 05:23:19,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:19,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608266752] [2021-04-15 05:23:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:20,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608266752] [2021-04-15 05:23:20,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119631570] [2021-04-15 05:23:20,140 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:20,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:23:20,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:23:20,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:20,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:20,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-04-15 05:23:20,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072894739] [2021-04-15 05:23:20,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 05:23:20,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:20,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 05:23:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:23:20,477 INFO L87 Difference]: Start difference. First operand 203520 states and 588621 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:23,040 INFO L93 Difference]: Finished difference Result 252696 states and 730460 transitions. [2021-04-15 05:23:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:23:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:23:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:23,642 INFO L225 Difference]: With dead ends: 252696 [2021-04-15 05:23:23,642 INFO L226 Difference]: Without dead ends: 252590 [2021-04-15 05:23:23,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 581.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:23:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252590 states. [2021-04-15 05:23:28,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252590 to 237270. [2021-04-15 05:23:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237270 states, 237269 states have (on average 2.8979596997500727) internal successors, (687596), 237269 states have internal predecessors, (687596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237270 states to 237270 states and 687596 transitions. [2021-04-15 05:23:30,230 INFO L78 Accepts]: Start accepts. Automaton has 237270 states and 687596 transitions. Word has length 46 [2021-04-15 05:23:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:30,231 INFO L480 AbstractCegarLoop]: Abstraction has 237270 states and 687596 transitions. [2021-04-15 05:23:30,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 237270 states and 687596 transitions. [2021-04-15 05:23:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:23:30,678 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:30,678 INFO L551 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] [2021-04-15 05:23:30,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-04-15 05:23:30,879 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1527268248, now seen corresponding path program 208 times [2021-04-15 05:23:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:30,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020020817] [2021-04-15 05:23:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:31,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020020817] [2021-04-15 05:23:31,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57976549] [2021-04-15 05:23:31,055 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:31,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:23:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:23:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:31,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:31,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-04-15 05:23:31,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037064518] [2021-04-15 05:23:31,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:23:31,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:31,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:23:31,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:23:31,409 INFO L87 Difference]: Start difference. First operand 237270 states and 687596 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:33,738 INFO L93 Difference]: Finished difference Result 255213 states and 737547 transitions. [2021-04-15 05:23:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:23:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:23:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:34,514 INFO L225 Difference]: With dead ends: 255213 [2021-04-15 05:23:34,514 INFO L226 Difference]: Without dead ends: 255089 [2021-04-15 05:23:34,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:23:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255089 states. [2021-04-15 05:23:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255089 to 233794. [2021-04-15 05:23:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233794 states, 233793 states have (on average 2.8954160304200727) internal successors, (676928), 233793 states have internal predecessors, (676928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233794 states to 233794 states and 676928 transitions. [2021-04-15 05:23:40,415 INFO L78 Accepts]: Start accepts. Automaton has 233794 states and 676928 transitions. Word has length 46 [2021-04-15 05:23:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:40,416 INFO L480 AbstractCegarLoop]: Abstraction has 233794 states and 676928 transitions. [2021-04-15 05:23:40,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 233794 states and 676928 transitions. [2021-04-15 05:23:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:23:40,825 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:40,825 INFO L551 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] [2021-04-15 05:23:41,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:41,026 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1217093792, now seen corresponding path program 209 times [2021-04-15 05:23:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:41,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398115031] [2021-04-15 05:23:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:41,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398115031] [2021-04-15 05:23:41,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704464567] [2021-04-15 05:23:41,194 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:41,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:23:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:41,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 05:23:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:41,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:41,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-04-15 05:23:41,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544697020] [2021-04-15 05:23:41,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:23:41,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:41,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:23:41,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:23:41,577 INFO L87 Difference]: Start difference. First operand 233794 states and 676928 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:44,532 INFO L93 Difference]: Finished difference Result 250467 states and 723146 transitions. [2021-04-15 05:23:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:23:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:23:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:45,317 INFO L225 Difference]: With dead ends: 250467 [2021-04-15 05:23:45,317 INFO L226 Difference]: Without dead ends: 250336 [2021-04-15 05:23:45,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:23:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250336 states. [2021-04-15 05:23:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250336 to 231860. [2021-04-15 05:23:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231860 states, 231859 states have (on average 2.8944617202696468) internal successors, (671107), 231859 states have internal predecessors, (671107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231860 states to 231860 states and 671107 transitions. [2021-04-15 05:23:51,509 INFO L78 Accepts]: Start accepts. Automaton has 231860 states and 671107 transitions. Word has length 46 [2021-04-15 05:23:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:51,510 INFO L480 AbstractCegarLoop]: Abstraction has 231860 states and 671107 transitions. [2021-04-15 05:23:51,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 231860 states and 671107 transitions. [2021-04-15 05:23:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:23:51,934 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:51,934 INFO L551 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] [2021-04-15 05:23:52,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:52,135 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1861204456, now seen corresponding path program 210 times [2021-04-15 05:23:52,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:52,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389566092] [2021-04-15 05:23:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:52,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389566092] [2021-04-15 05:23:52,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919263329] [2021-04-15 05:23:52,321 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:52,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:23:52,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:52,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 05:23:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:53,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:53,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-04-15 05:23:53,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61027126] [2021-04-15 05:23:53,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:23:53,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:53,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:23:53,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:23:53,471 INFO L87 Difference]: Start difference. First operand 231860 states and 671107 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:55,173 INFO L93 Difference]: Finished difference Result 247378 states and 714117 transitions. [2021-04-15 05:23:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:23:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:23:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:56,337 INFO L225 Difference]: With dead ends: 247378 [2021-04-15 05:23:56,338 INFO L226 Difference]: Without dead ends: 247224 [2021-04-15 05:23:56,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1383.2ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:23:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247224 states. [2021-04-15 05:24:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247224 to 231140. [2021-04-15 05:24:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231140 states, 231139 states have (on average 2.894349287658076) internal successors, (668997), 231139 states have internal predecessors, (668997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231140 states to 231140 states and 668997 transitions. [2021-04-15 05:24:02,311 INFO L78 Accepts]: Start accepts. Automaton has 231140 states and 668997 transitions. Word has length 46 [2021-04-15 05:24:02,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:02,311 INFO L480 AbstractCegarLoop]: Abstraction has 231140 states and 668997 transitions. [2021-04-15 05:24:02,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 231140 states and 668997 transitions. [2021-04-15 05:24:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:24:02,771 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:02,771 INFO L551 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] [2021-04-15 05:24:02,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:02,971 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:02,972 INFO L82 PathProgramCache]: Analyzing trace with hash -648117152, now seen corresponding path program 211 times [2021-04-15 05:24:02,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:02,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286253664] [2021-04-15 05:24:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286253664] [2021-04-15 05:24:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836884068] [2021-04-15 05:24:03,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:24:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:03,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:03,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-04-15 05:24:03,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072172483] [2021-04-15 05:24:03,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:24:03,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:24:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:24:03,565 INFO L87 Difference]: Start difference. First operand 231140 states and 668997 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:05,784 INFO L93 Difference]: Finished difference Result 246311 states and 711077 transitions. [2021-04-15 05:24:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:24:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:24:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:06,454 INFO L225 Difference]: With dead ends: 246311 [2021-04-15 05:24:06,454 INFO L226 Difference]: Without dead ends: 246235 [2021-04-15 05:24:06,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:24:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246235 states. [2021-04-15 05:24:10,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246235 to 230378. [2021-04-15 05:24:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230378 states, 230377 states have (on average 2.8942732998519816) internal successors, (666774), 230377 states have internal predecessors, (666774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230378 states to 230378 states and 666774 transitions. [2021-04-15 05:24:12,450 INFO L78 Accepts]: Start accepts. Automaton has 230378 states and 666774 transitions. Word has length 46 [2021-04-15 05:24:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:12,450 INFO L480 AbstractCegarLoop]: Abstraction has 230378 states and 666774 transitions. [2021-04-15 05:24:12,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 230378 states and 666774 transitions. [2021-04-15 05:24:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:24:12,828 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:12,828 INFO L551 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] [2021-04-15 05:24:13,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-04-15 05:24:13,028 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash 580927768, now seen corresponding path program 212 times [2021-04-15 05:24:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:13,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936575355] [2021-04-15 05:24:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:13,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936575355] [2021-04-15 05:24:13,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638318935] [2021-04-15 05:24:13,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:13,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:24:13,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 05:24:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:13,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:13,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-04-15 05:24:13,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277235305] [2021-04-15 05:24:13,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 05:24:13,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 05:24:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:24:13,637 INFO L87 Difference]: Start difference. First operand 230378 states and 666774 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:15,975 INFO L93 Difference]: Finished difference Result 246237 states and 710860 transitions. [2021-04-15 05:24:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:24:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:24:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:16,604 INFO L225 Difference]: With dead ends: 246237 [2021-04-15 05:24:16,604 INFO L226 Difference]: Without dead ends: 246161 [2021-04-15 05:24:16,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 677.7ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:24:16,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246161 states. [2021-04-15 05:24:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246161 to 231129. [2021-04-15 05:24:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231129 states, 231128 states have (on average 2.894201481430203) internal successors, (668931), 231128 states have internal predecessors, (668931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231129 states to 231129 states and 668931 transitions. [2021-04-15 05:24:22,637 INFO L78 Accepts]: Start accepts. Automaton has 231129 states and 668931 transitions. Word has length 46 [2021-04-15 05:24:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:22,638 INFO L480 AbstractCegarLoop]: Abstraction has 231129 states and 668931 transitions. [2021-04-15 05:24:22,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 231129 states and 668931 transitions. [2021-04-15 05:24:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:24:23,078 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:23,078 INFO L551 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] [2021-04-15 05:24:23,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-04-15 05:24:23,279 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:23,279 INFO L82 PathProgramCache]: Analyzing trace with hash 372500588, now seen corresponding path program 213 times [2021-04-15 05:24:23,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:23,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149377626] [2021-04-15 05:24:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:24,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149377626] [2021-04-15 05:24:24,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412641426] [2021-04-15 05:24:24,405 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:24,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 05:24:24,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:24:24,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:24,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:24,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-04-15 05:24:24,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593759920] [2021-04-15 05:24:24,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 05:24:24,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 05:24:24,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:24:24,848 INFO L87 Difference]: Start difference. First operand 231129 states and 668931 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:27,213 INFO L93 Difference]: Finished difference Result 270239 states and 783485 transitions. [2021-04-15 05:24:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:24:27,214 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:24:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:27,873 INFO L225 Difference]: With dead ends: 270239 [2021-04-15 05:24:27,873 INFO L226 Difference]: Without dead ends: 270117 [2021-04-15 05:24:27,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:24:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270117 states. [2021-04-15 05:24:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270117 to 269291. [2021-04-15 05:24:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269291 states, 269290 states have (on average 2.90108804634409) internal successors, (781234), 269290 states have internal predecessors, (781234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269291 states to 269291 states and 781234 transitions. [2021-04-15 05:24:34,137 INFO L78 Accepts]: Start accepts. Automaton has 269291 states and 781234 transitions. Word has length 46 [2021-04-15 05:24:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:34,137 INFO L480 AbstractCegarLoop]: Abstraction has 269291 states and 781234 transitions. [2021-04-15 05:24:34,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 269291 states and 781234 transitions. [2021-04-15 05:24:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:24:35,545 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:35,545 INFO L551 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] [2021-04-15 05:24:35,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:35,746 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:35,746 INFO L82 PathProgramCache]: Analyzing trace with hash -850429848, now seen corresponding path program 214 times [2021-04-15 05:24:35,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:35,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759207054] [2021-04-15 05:24:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:35,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759207054] [2021-04-15 05:24:35,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778525646] [2021-04-15 05:24:35,909 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:35,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:24:35,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:35,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:24:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:36,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:36,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-04-15 05:24:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632390449] [2021-04-15 05:24:36,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:24:36,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:36,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:24:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:24:36,287 INFO L87 Difference]: Start difference. First operand 269291 states and 781234 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:38,628 INFO L93 Difference]: Finished difference Result 272736 states and 790490 transitions. [2021-04-15 05:24:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:24:38,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:24:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:39,300 INFO L225 Difference]: With dead ends: 272736 [2021-04-15 05:24:39,300 INFO L226 Difference]: Without dead ends: 272606 [2021-04-15 05:24:39,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:24:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272606 states. [2021-04-15 05:24:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272606 to 266635. [2021-04-15 05:24:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266635 states, 266634 states have (on average 2.8985200687084167) internal successors, (772844), 266634 states have internal predecessors, (772844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266635 states to 266635 states and 772844 transitions. [2021-04-15 05:24:47,294 INFO L78 Accepts]: Start accepts. Automaton has 266635 states and 772844 transitions. Word has length 46 [2021-04-15 05:24:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:47,294 INFO L480 AbstractCegarLoop]: Abstraction has 266635 states and 772844 transitions. [2021-04-15 05:24:47,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 266635 states and 772844 transitions. [2021-04-15 05:24:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:24:47,705 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:47,705 INFO L551 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] [2021-04-15 05:24:47,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-04-15 05:24:47,906 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:47,906 INFO L82 PathProgramCache]: Analyzing trace with hash -454634690, now seen corresponding path program 215 times [2021-04-15 05:24:47,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:47,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729969968] [2021-04-15 05:24:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:48,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729969968] [2021-04-15 05:24:48,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048015938] [2021-04-15 05:24:48,056 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:48,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 05:24:48,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:48,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:24:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:48,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:48,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-04-15 05:24:48,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76845036] [2021-04-15 05:24:48,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:24:48,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:48,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:24:48,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:24:48,431 INFO L87 Difference]: Start difference. First operand 266635 states and 772844 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:50,818 INFO L93 Difference]: Finished difference Result 269030 states and 778880 transitions. [2021-04-15 05:24:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:24:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:24:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:51,430 INFO L225 Difference]: With dead ends: 269030 [2021-04-15 05:24:51,430 INFO L226 Difference]: Without dead ends: 268899 [2021-04-15 05:24:51,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:24:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268899 states. [2021-04-15 05:24:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268899 to 263749. [2021-04-15 05:24:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263749 states, 263748 states have (on average 2.898558472481308) internal successors, (764489), 263748 states have internal predecessors, (764489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263749 states to 263749 states and 764489 transitions. [2021-04-15 05:24:57,937 INFO L78 Accepts]: Start accepts. Automaton has 263749 states and 764489 transitions. Word has length 46 [2021-04-15 05:24:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 263749 states and 764489 transitions. [2021-04-15 05:24:57,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 263749 states and 764489 transitions. [2021-04-15 05:24:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:24:58,334 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:58,334 INFO L551 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] [2021-04-15 05:24:58,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:58,535 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:58,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:58,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1743048966, now seen corresponding path program 216 times [2021-04-15 05:24:58,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:58,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103887576] [2021-04-15 05:24:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:58,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103887576] [2021-04-15 05:24:58,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055581445] [2021-04-15 05:24:58,728 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:58,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:24:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 05:24:58,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:59,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:59,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-04-15 05:24:59,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126441606] [2021-04-15 05:24:59,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:24:59,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:24:59,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:24:59,151 INFO L87 Difference]: Start difference. First operand 263749 states and 764489 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:01,547 INFO L93 Difference]: Finished difference Result 264954 states and 767363 transitions. [2021-04-15 05:25:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:25:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 05:25:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:02,741 INFO L225 Difference]: With dead ends: 264954 [2021-04-15 05:25:02,741 INFO L226 Difference]: Without dead ends: 264824 [2021-04-15 05:25:02,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:25:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264824 states. [2021-04-15 05:25:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264824 to 261525. [2021-04-15 05:25:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261525 states, 261524 states have (on average 2.8981470151878987) internal successors, (757935), 261524 states have internal predecessors, (757935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261525 states to 261525 states and 757935 transitions. [2021-04-15 05:25:08,963 INFO L78 Accepts]: Start accepts. Automaton has 261525 states and 757935 transitions. Word has length 46 [2021-04-15 05:25:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:08,963 INFO L480 AbstractCegarLoop]: Abstraction has 261525 states and 757935 transitions. [2021-04-15 05:25:08,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 261525 states and 757935 transitions. [2021-04-15 05:25:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 05:25:09,377 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:09,377 INFO L551 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] [2021-04-15 05:25:09,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:09,578 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 455384638, now seen corresponding path program 217 times [2021-04-15 05:25:09,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:09,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087496117] [2021-04-15 05:25:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-04-15 05:25:09,701 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-04-15 05:25:09,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-04-15 05:25:09,701 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 05:25:09,705 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 05:25:09,705 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:25:09 BasicIcfg [2021-04-15 05:25:09,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:25:09,706 INFO L168 Benchmark]: Toolchain (without parser) took 699469.95 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.5 MB in the beginning and 10.7 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.3 GB. Max. memory is 16.0 GB. [2021-04-15 05:25:09,706 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:25:09,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 235.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:25:09,706 INFO L168 Benchmark]: Boogie Preprocessor took 18.41 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 234.0 MB in the end (delta: 791.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:25:09,706 INFO L168 Benchmark]: RCFGBuilder took 337.78 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 237.4 MB in the end (delta: -3.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-04-15 05:25:09,706 INFO L168 Benchmark]: TraceAbstraction took 699086.70 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.6 MB in the beginning and 10.7 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.3 GB. Max. memory is 16.0 GB. [2021-04-15 05:25:09,706 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 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 235.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.41 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 234.0 MB in the end (delta: 791.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 337.78 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 237.4 MB in the end (delta: -3.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 699086.70 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.6 MB in the beginning and 10.7 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 68). Cancelled while BasicCegarLoop was analyzing trace of length 47 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 698996.5ms, OverallIterations: 235, TraceHistogramMax: 4, EmptinessCheckTime: 27729.2ms, AutomataDifference: 207001.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21040 SDtfs, 43433 SDslu, 183728 SDs, 0 SdLazy, 83818 SolverSat, 4606 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35533.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15463 GetRequests, 8835 SyntacticMatches, 171 SemanticMatches, 6457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60374 ImplicationChecksByTransitivity, 78090.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269291occurred in iteration=231, InterpolantAutomatonStates: 6059, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 348555.1ms AutomataMinimizationTime, 234 MinimizatonAttempts, 2242442 StatesRemovedByMinimization, 234 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 933.3ms SsaConstructionTime, 3349.0ms SatisfiabilityAnalysisTime, 62090.6ms InterpolantComputationTime, 17008 NumberOfCodeBlocks, 17005 NumberOfCodeBlocksAsserted, 871 NumberOfCheckSat, 16554 ConstructedInterpolants, 0 QuantifiedInterpolants, 124875 SizeOfPredicates, 970 NumberOfNonLiveVariables, 17705 ConjunctsInSsa, 3998 ConjunctsInUnsatCore, 454 InterpolantComputations, 14 PerfectInterpolantSequences, 2163/9306 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown