/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/bench/exp2x9.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:38:38,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:38:38,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:38:38,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:38:38,633 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 [2021-02-19 17:38:38,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:38:38,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:38:38,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:38:38,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:38:38,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:38:38,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:38:38,656 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:38:38,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:38:38,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:38:38,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:38:38,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:38:38,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:38:38,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:38:38,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:38:38,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:38:38,657 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:38:38,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:38:38,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:38:38,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:38:38,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:38:38,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:38:38,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:38:38,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:38:38,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:38:38,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:38:38,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:38:38,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:38:38,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:38:38,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:38:38,659 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:38:38,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:38:38,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:38:38,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:38:38,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:38:38,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:38:38,973 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:38:38,975 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:38:38,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl [2021-02-19 17:38:38,976 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl' [2021-02-19 17:38:39,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:38:39,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:38:39,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:38:39,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:38:39,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:38:39,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:38:39,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:38:39,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:38:39,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:38:39,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/1) ... [2021-02-19 17:38:39,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:38:39,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:38:39,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:38:39,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:38:39,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (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 [2021-02-19 17:38:39,117 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:38:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:38:39,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:38:39,117 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:38:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:38:39,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:38:39,117 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:38:39,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:38:39,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:38:39,118 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 17:38:39,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 17:38:39,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 17:38:39,118 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 17:38:39,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 17:38:39,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 17:38:39,119 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:38:39,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:38:39,361 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:38:39,362 INFO L202 PluginConnector]: Adding new model exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:38:39 BoogieIcfgContainer [2021-02-19 17:38:39,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:38:39,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:38:39,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:38:39,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:38:39,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:38:39" (1/2) ... [2021-02-19 17:38:39,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c74151 and model type exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:38:39, skipping insertion in model container [2021-02-19 17:38:39,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:38:39" (2/2) ... [2021-02-19 17:38:39,368 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x9.wvr.bpl [2021-02-19 17:38:39,388 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:38:39,389 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:38:39,391 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:38:39,392 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:38:39,490 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 17:38:39,504 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 17:38:39,519 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:38:39,520 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:38:39,520 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:38:39,520 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:38:39,520 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:38:39,520 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:38:39,520 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:38:39,520 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:38:39,529 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 57 transitions, 146 flow [2021-02-19 17:38:40,440 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12227 states, 12225 states have (on average 3.979304703476483) internal successors, (48647), 12226 states have internal predecessors, (48647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 12227 states, 12225 states have (on average 3.979304703476483) internal successors, (48647), 12226 states have internal predecessors, (48647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:38:40,570 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:40,571 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:38:40,571 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1268780803, now seen corresponding path program 1 times [2021-02-19 17:38:40,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:40,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127770677] [2021-02-19 17:38:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:40,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127770677] [2021-02-19 17:38:40,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:40,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 17:38:40,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457562311] [2021-02-19 17:38:40,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:38:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:38:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:38:40,750 INFO L87 Difference]: Start difference. First operand has 12227 states, 12225 states have (on average 3.979304703476483) internal successors, (48647), 12226 states have internal predecessors, (48647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:41,026 INFO L93 Difference]: Finished difference Result 12650 states and 50294 transitions. [2021-02-19 17:38:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:38:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:38:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:41,259 INFO L225 Difference]: With dead ends: 12650 [2021-02-19 17:38:41,259 INFO L226 Difference]: Without dead ends: 12619 [2021-02-19 17:38:41,261 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:38:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12619 states. [2021-02-19 17:38:42,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12619 to 12354. [2021-02-19 17:38:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.977900105237594) internal successors, (49139), 12353 states have internal predecessors, (49139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 49139 transitions. [2021-02-19 17:38:42,183 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 49139 transitions. Word has length 19 [2021-02-19 17:38:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:42,185 INFO L480 AbstractCegarLoop]: Abstraction has 12354 states and 49139 transitions. [2021-02-19 17:38:42,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 49139 transitions. [2021-02-19 17:38:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:38:42,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:42,226 INFO L506 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] [2021-02-19 17:38:42,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:38:42,227 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1891544088, now seen corresponding path program 1 times [2021-02-19 17:38:42,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:42,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17189573] [2021-02-19 17:38:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:42,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17189573] [2021-02-19 17:38:42,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:42,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:38:42,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046539407] [2021-02-19 17:38:42,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:38:42,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:38:42,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:42,329 INFO L87 Difference]: Start difference. First operand 12354 states and 49139 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-02-19 17:38:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:42,711 INFO L93 Difference]: Finished difference Result 19078 states and 74406 transitions. [2021-02-19 17:38:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:38:42,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 27 [2021-02-19 17:38:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:43,004 INFO L225 Difference]: With dead ends: 19078 [2021-02-19 17:38:43,004 INFO L226 Difference]: Without dead ends: 19078 [2021-02-19 17:38:43,005 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19078 states. [2021-02-19 17:38:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19078 to 13678. [2021-02-19 17:38:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13678 states, 13677 states have (on average 3.9960517657381005) internal successors, (54654), 13677 states have internal predecessors, (54654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13678 states to 13678 states and 54654 transitions. [2021-02-19 17:38:43,874 INFO L78 Accepts]: Start accepts. Automaton has 13678 states and 54654 transitions. Word has length 27 [2021-02-19 17:38:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:43,875 INFO L480 AbstractCegarLoop]: Abstraction has 13678 states and 54654 transitions. [2021-02-19 17:38:43,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-02-19 17:38:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 13678 states and 54654 transitions. [2021-02-19 17:38:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:38:43,922 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:43,923 INFO L506 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] [2021-02-19 17:38:43,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:38:43,923 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1349086548, now seen corresponding path program 1 times [2021-02-19 17:38:43,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:43,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443987964] [2021-02-19 17:38:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:43,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443987964] [2021-02-19 17:38:43,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:43,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:38:43,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892150968] [2021-02-19 17:38:43,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:38:43,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:38:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:38:43,987 INFO L87 Difference]: Start difference. First operand 13678 states and 54654 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:44,413 INFO L93 Difference]: Finished difference Result 19792 states and 77741 transitions. [2021-02-19 17:38:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:38:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-02-19 17:38:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:44,502 INFO L225 Difference]: With dead ends: 19792 [2021-02-19 17:38:44,503 INFO L226 Difference]: Without dead ends: 19792 [2021-02-19 17:38:44,503 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19792 states. [2021-02-19 17:38:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19792 to 15127. [2021-02-19 17:38:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15127 states, 15126 states have (on average 4.021750628057649) internal successors, (60833), 15126 states have internal predecessors, (60833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 60833 transitions. [2021-02-19 17:38:45,650 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 60833 transitions. Word has length 27 [2021-02-19 17:38:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:45,650 INFO L480 AbstractCegarLoop]: Abstraction has 15127 states and 60833 transitions. [2021-02-19 17:38:45,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 60833 transitions. [2021-02-19 17:38:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:38:45,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:45,700 INFO L506 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] [2021-02-19 17:38:45,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:38:45,701 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2089123108, now seen corresponding path program 1 times [2021-02-19 17:38:45,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:45,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79086317] [2021-02-19 17:38:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:45,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79086317] [2021-02-19 17:38:45,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:45,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:38:45,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272443184] [2021-02-19 17:38:45,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:38:45,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:45,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:38:45,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:38:45,738 INFO L87 Difference]: Start difference. First operand 15127 states and 60833 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:45,883 INFO L93 Difference]: Finished difference Result 16794 states and 66463 transitions. [2021-02-19 17:38:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:38:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-02-19 17:38:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:45,956 INFO L225 Difference]: With dead ends: 16794 [2021-02-19 17:38:45,956 INFO L226 Difference]: Without dead ends: 16774 [2021-02-19 17:38:45,956 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:38:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-02-19 17:38:46,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 15695. [2021-02-19 17:38:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15695 states, 15694 states have (on average 4.002867337836116) internal successors, (62821), 15694 states have internal predecessors, (62821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15695 states to 15695 states and 62821 transitions. [2021-02-19 17:38:46,700 INFO L78 Accepts]: Start accepts. Automaton has 15695 states and 62821 transitions. Word has length 27 [2021-02-19 17:38:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:46,700 INFO L480 AbstractCegarLoop]: Abstraction has 15695 states and 62821 transitions. [2021-02-19 17:38:46,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 15695 states and 62821 transitions. [2021-02-19 17:38:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:38:46,737 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:46,737 INFO L506 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] [2021-02-19 17:38:46,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:38:46,737 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:46,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash 374685256, now seen corresponding path program 1 times [2021-02-19 17:38:46,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:46,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71584372] [2021-02-19 17:38:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:46,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71584372] [2021-02-19 17:38:46,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:46,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:38:46,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265129479] [2021-02-19 17:38:46,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:38:46,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:38:46,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:38:46,786 INFO L87 Difference]: Start difference. First operand 15695 states and 62821 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:46,970 INFO L93 Difference]: Finished difference Result 17936 states and 70972 transitions. [2021-02-19 17:38:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:38:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-02-19 17:38:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:47,207 INFO L225 Difference]: With dead ends: 17936 [2021-02-19 17:38:47,207 INFO L226 Difference]: Without dead ends: 17912 [2021-02-19 17:38:47,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17912 states. [2021-02-19 17:38:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17912 to 15939. [2021-02-19 17:38:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15939 states, 15938 states have (on average 3.9939139164261515) internal successors, (63655), 15938 states have internal predecessors, (63655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15939 states to 15939 states and 63655 transitions. [2021-02-19 17:38:47,976 INFO L78 Accepts]: Start accepts. Automaton has 15939 states and 63655 transitions. Word has length 27 [2021-02-19 17:38:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:47,977 INFO L480 AbstractCegarLoop]: Abstraction has 15939 states and 63655 transitions. [2021-02-19 17:38:47,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15939 states and 63655 transitions. [2021-02-19 17:38:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:38:48,010 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:48,011 INFO L506 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] [2021-02-19 17:38:48,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:38:48,011 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 178685636, now seen corresponding path program 2 times [2021-02-19 17:38:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:48,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830411476] [2021-02-19 17:38:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:48,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830411476] [2021-02-19 17:38:48,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:48,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:38:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276424648] [2021-02-19 17:38:48,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:38:48,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:38:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:38:48,039 INFO L87 Difference]: Start difference. First operand 15939 states and 63655 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:48,211 INFO L93 Difference]: Finished difference Result 18937 states and 75002 transitions. [2021-02-19 17:38:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:38:48,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-02-19 17:38:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:48,275 INFO L225 Difference]: With dead ends: 18937 [2021-02-19 17:38:48,275 INFO L226 Difference]: Without dead ends: 18937 [2021-02-19 17:38:48,279 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18937 states. [2021-02-19 17:38:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18937 to 17401. [2021-02-19 17:38:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17401 states, 17400 states have (on average 3.990229885057471) internal successors, (69430), 17400 states have internal predecessors, (69430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17401 states to 17401 states and 69430 transitions. [2021-02-19 17:38:49,196 INFO L78 Accepts]: Start accepts. Automaton has 17401 states and 69430 transitions. Word has length 27 [2021-02-19 17:38:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:49,196 INFO L480 AbstractCegarLoop]: Abstraction has 17401 states and 69430 transitions. [2021-02-19 17:38:49,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 17401 states and 69430 transitions. [2021-02-19 17:38:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:38:49,223 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:49,223 INFO L506 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] [2021-02-19 17:38:49,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:38:49,223 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:49,224 INFO L82 PathProgramCache]: Analyzing trace with hash -439410064, now seen corresponding path program 2 times [2021-02-19 17:38:49,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:49,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756395868] [2021-02-19 17:38:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:49,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756395868] [2021-02-19 17:38:49,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:49,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:38:49,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315224039] [2021-02-19 17:38:49,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:38:49,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:38:49,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:38:49,245 INFO L87 Difference]: Start difference. First operand 17401 states and 69430 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:49,398 INFO L93 Difference]: Finished difference Result 18936 states and 74728 transitions. [2021-02-19 17:38:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:38:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-02-19 17:38:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:49,458 INFO L225 Difference]: With dead ends: 18936 [2021-02-19 17:38:49,459 INFO L226 Difference]: Without dead ends: 18895 [2021-02-19 17:38:49,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18895 states. [2021-02-19 17:38:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18895 to 17646. [2021-02-19 17:38:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17646 states, 17645 states have (on average 3.9815245111929727) internal successors, (70254), 17645 states have internal predecessors, (70254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17646 states to 17646 states and 70254 transitions. [2021-02-19 17:38:50,232 INFO L78 Accepts]: Start accepts. Automaton has 17646 states and 70254 transitions. Word has length 27 [2021-02-19 17:38:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:50,232 INFO L480 AbstractCegarLoop]: Abstraction has 17646 states and 70254 transitions. [2021-02-19 17:38:50,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-02-19 17:38:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 17646 states and 70254 transitions. [2021-02-19 17:38:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:38:50,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:50,262 INFO L506 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] [2021-02-19 17:38:50,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:38:50,262 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:50,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1412742812, now seen corresponding path program 2 times [2021-02-19 17:38:50,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:50,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835080038] [2021-02-19 17:38:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:50,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835080038] [2021-02-19 17:38:50,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:38:50,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:38:50,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593574085] [2021-02-19 17:38:50,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:38:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:38:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:38:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:50,517 INFO L87 Difference]: Start difference. First operand 17646 states and 70254 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-02-19 17:38:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:38:50,710 INFO L93 Difference]: Finished difference Result 20333 states and 80199 transitions. [2021-02-19 17:38:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:38:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 27 [2021-02-19 17:38:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:38:50,773 INFO L225 Difference]: With dead ends: 20333 [2021-02-19 17:38:50,786 INFO L226 Difference]: Without dead ends: 20333 [2021-02-19 17:38:50,786 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:38:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20333 states. [2021-02-19 17:38:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20333 to 19021. [2021-02-19 17:38:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19021 states, 19020 states have (on average 3.982492113564669) internal successors, (75747), 19020 states have internal predecessors, (75747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:38:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19021 states to 19021 states and 75747 transitions. [2021-02-19 17:38:51,540 INFO L78 Accepts]: Start accepts. Automaton has 19021 states and 75747 transitions. Word has length 27 [2021-02-19 17:38:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:38:51,540 INFO L480 AbstractCegarLoop]: Abstraction has 19021 states and 75747 transitions. [2021-02-19 17:38:51,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-02-19 17:38:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 19021 states and 75747 transitions. [2021-02-19 17:38:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:38:51,581 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:38:51,582 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:38:51,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:38:51,582 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:38:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:38:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash 403754823, now seen corresponding path program 1 times [2021-02-19 17:38:51,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:38:51,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458505982] [2021-02-19 17:38:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:38:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:38:51,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458505982] [2021-02-19 17:38:51,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711833359] [2021-02-19 17:38:51,765 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 [2021-02-19 17:38:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:38:51,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:38:51,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:38:52,929 WARN L340 FreeRefinementEngine]: Global settings require throwing the following exception [2021-02-19 17:38:53,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-02-19 17:38:53,130 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_x1_10_133 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.access$1(DualJunctionDer.java:323) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:861) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:826) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:744) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:380) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:226) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:143) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-02-19 17:38:53,133 INFO L168 Benchmark]: Toolchain (without parser) took 14119.59 ms. Allocated memory was 255.9 MB in the beginning and 11.5 GB in the end (delta: 11.2 GB). Free memory was 236.4 MB in the beginning and 10.8 GB in the end (delta: -10.6 GB). Peak memory consumption was 594.4 MB. Max. memory is 16.0 GB. [2021-02-19 17:38:53,133 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:38:53,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.78 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:38:53,134 INFO L168 Benchmark]: Boogie Preprocessor took 13.36 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:38:53,134 INFO L168 Benchmark]: RCFGBuilder took 306.25 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 236.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:38:53,134 INFO L168 Benchmark]: TraceAbstraction took 13768.78 ms. Allocated memory was 255.9 MB in the beginning and 11.5 GB in the end (delta: 11.2 GB). Free memory was 235.5 MB in the beginning and 10.8 GB in the end (delta: -10.6 GB). Peak memory consumption was 592.2 MB. Max. memory is 16.0 GB. [2021-02-19 17:38:53,135 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 was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.78 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.36 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 306.25 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 236.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 13768.78 ms. Allocated memory was 255.9 MB in the beginning and 11.5 GB in the end (delta: 11.2 GB). Free memory was 235.5 MB in the beginning and 10.8 GB in the end (delta: -10.6 GB). Peak memory consumption was 592.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_x1_10_133 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_x1_10_133 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...