/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/chl/exp-term-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:57:57,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:57:57,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:57:57,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:57:57,391 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 02:57:57,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:57:57,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:57:57,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:57:57,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:57:57,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:57:57,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:57:57,432 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:57:57,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:57:57,432 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:57:57,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:57:57,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:57:57,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:57:57,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:57:57,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:57:57,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:57:57,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:57:57,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:57:57,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:57:57,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:57:57,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:57:57,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:57:57,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:57:57,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:57:57,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:57:57,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:57:57,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:57:57,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:57:57,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:57:57,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:57:57,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:57:57,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:57:57,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:57:57,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:57:57,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:57:57,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:57:57,775 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:57:57,776 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:57:57,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-subst.wvr.bpl [2021-04-15 02:57:57,777 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-subst.wvr.bpl' [2021-04-15 02:57:57,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:57:57,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:57:57,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:57:57,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:57:57,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:57:57,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:57:57,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:57:57,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:57:57,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:57:57,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/1) ... [2021-04-15 02:57:57,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:57:57,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:57:57,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:57:57,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:57:57,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (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 02:57:57,911 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:57:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:57:57,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:57:57,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:57:57,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:57:57,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:57:57,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:57:57,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:57:57,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:57:57,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 02:57:57,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 02:57:57,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 02:57:57,913 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 02:57:58,098 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:57:58,099 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 02:57:58,101 INFO L202 PluginConnector]: Adding new model exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:57:58 BoogieIcfgContainer [2021-04-15 02:57:58,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:57:58,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:57:58,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:57:58,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:57:58,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:57" (1/2) ... [2021-04-15 02:57:58,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba535d8 and model type exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:57:58, skipping insertion in model container [2021-04-15 02:57:58,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:57:58" (2/2) ... [2021-04-15 02:57:58,114 INFO L111 eAbstractionObserver]: Analyzing ICFG exp-term-subst.wvr.bpl [2021-04-15 02:57:58,119 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:57:58,120 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:57:58,123 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:57:58,124 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:57:58,205 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 02:57:58,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 02:57:58,256 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:57:58,256 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:57:58,256 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:57:58,256 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:57:58,256 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:57:58,256 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:57:58,256 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:57:58,256 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:57:58,263 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-04-15 02:57:58,275 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:58,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:58,283 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:58,284 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:58,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1166046104, now seen corresponding path program 1 times [2021-04-15 02:57:58,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:58,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804114581] [2021-04-15 02:57:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:58,870 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-04-15 02:57:58,979 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 02:57:58,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804114581] [2021-04-15 02:57:58,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:58,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:58,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781507289] [2021-04-15 02:57:58,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:58,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:59,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:59,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:59,003 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:59,252 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-04-15 02:57:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:59,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:59,263 INFO L225 Difference]: With dead ends: 98 [2021-04-15 02:57:59,263 INFO L226 Difference]: Without dead ends: 72 [2021-04-15 02:57:59,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-04-15 02:57:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-04-15 02:57:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-04-15 02:57:59,310 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-04-15 02:57:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:57:59,311 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-04-15 02:57:59,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-04-15 02:57:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:59,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:59,312 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:59,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:57:59,313 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1802957416, now seen corresponding path program 2 times [2021-04-15 02:57:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:59,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360046515] [2021-04-15 02:57:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:59,632 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-04-15 02:57:59,756 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 02:57:59,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360046515] [2021-04-15 02:57:59,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:59,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:59,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550946383] [2021-04-15 02:57:59,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:59,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:59,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:59,759 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:59,980 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 02:57:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:59,993 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-04-15 02:57:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:59,994 INFO L225 Difference]: With dead ends: 93 [2021-04-15 02:57:59,994 INFO L226 Difference]: Without dead ends: 65 [2021-04-15 02:57:59,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 441.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-04-15 02:57:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-04-15 02:57:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-04-15 02:58:00,000 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-04-15 02:58:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:58:00,000 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-04-15 02:58:00,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-04-15 02:58:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:58:00,001 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:58:00,002 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:58:00,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 02:58:00,002 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:58:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:58:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2138675608, now seen corresponding path program 3 times [2021-04-15 02:58:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:58:00,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960628561] [2021-04-15 02:58:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:58:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:58:00,248 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 02:58:00,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960628561] [2021-04-15 02:58:00,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:58:00,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:58:00,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838728178] [2021-04-15 02:58:00,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:58:00,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:58:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:58:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:58:00,251 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:58:00,401 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-04-15 02:58:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:58:00,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:58:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:58:00,404 INFO L225 Difference]: With dead ends: 80 [2021-04-15 02:58:00,404 INFO L226 Difference]: Without dead ends: 54 [2021-04-15 02:58:00,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:58:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-04-15 02:58:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-04-15 02:58:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 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 02:58:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-04-15 02:58:00,408 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-04-15 02:58:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:58:00,409 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-04-15 02:58:00,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-04-15 02:58:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:58:00,410 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:58:00,410 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:58:00,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:58:00,410 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:58:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:58:00,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1206578362, now seen corresponding path program 4 times [2021-04-15 02:58:00,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:58:00,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583803058] [2021-04-15 02:58:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:58:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:58:00,630 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-04-15 02:58:00,714 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 02:58:00,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583803058] [2021-04-15 02:58:00,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:58:00,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:58:00,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565412403] [2021-04-15 02:58:00,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:58:00,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:58:00,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:58:00,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:58:00,716 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:00,867 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-04-15 02:58:01,032 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-04-15 02:58:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:58:01,041 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-04-15 02:58:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:58:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:58:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:58:01,043 INFO L225 Difference]: With dead ends: 56 [2021-04-15 02:58:01,043 INFO L226 Difference]: Without dead ends: 33 [2021-04-15 02:58:01,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:58:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-15 02:58:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-15 02:58:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 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 02:58:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-04-15 02:58:01,047 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-04-15 02:58:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:58:01,048 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-04-15 02:58:01,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-04-15 02:58:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:58:01,048 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:58:01,048 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:58:01,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:58:01,049 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:58:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:58:01,049 INFO L82 PathProgramCache]: Analyzing trace with hash 531109562, now seen corresponding path program 5 times [2021-04-15 02:58:01,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:58:01,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911958098] [2021-04-15 02:58:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:58:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:58:01,341 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-04-15 02:58:01,433 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 02:58:01,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911958098] [2021-04-15 02:58:01,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:58:01,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:58:01,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965399816] [2021-04-15 02:58:01,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:58:01,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:58:01,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:58:01,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:58:01,436 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:01,579 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-04-15 02:58:01,803 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-04-15 02:58:01,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:58:01,811 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-04-15 02:58:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:58:01,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:58:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:58:01,812 INFO L225 Difference]: With dead ends: 48 [2021-04-15 02:58:01,812 INFO L226 Difference]: Without dead ends: 27 [2021-04-15 02:58:01,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:58:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-15 02:58:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-04-15 02:58:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-04-15 02:58:01,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-04-15 02:58:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:58:01,816 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-04-15 02:58:01,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-04-15 02:58:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:58:01,816 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:58:01,816 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:58:01,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 02:58:01,817 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:58:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:58:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash 202726680, now seen corresponding path program 6 times [2021-04-15 02:58:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:58:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354844217] [2021-04-15 02:58:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:58:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:58:02,085 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 02:58:02,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354844217] [2021-04-15 02:58:02,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:58:02,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:58:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469639787] [2021-04-15 02:58:02,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:58:02,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:58:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:58:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:58:02,087 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:02,207 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-04-15 02:58:02,373 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-04-15 02:58:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:58:02,375 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-04-15 02:58:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:58:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:58:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:58:02,376 INFO L225 Difference]: With dead ends: 25 [2021-04-15 02:58:02,376 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 02:58:02,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:58:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 02:58:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 02:58:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 02:58:02,377 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-04-15 02:58:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:58:02,377 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 02:58:02,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:58:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 02:58:02,377 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 02:58:02,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 02:58:02,383 INFO L202 PluginConnector]: Adding new model exp-term-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:58:02 BasicIcfg [2021-04-15 02:58:02,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:58:02,384 INFO L168 Benchmark]: Toolchain (without parser) took 4574.72 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 236.6 MB in the beginning and 202.5 MB in the end (delta: 34.1 MB). Peak memory consumption was 123.5 MB. Max. memory is 16.0 GB. [2021-04-15 02:58:02,384 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:58:02,385 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.77 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:58:02,385 INFO L168 Benchmark]: Boogie Preprocessor took 16.04 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 907.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:58:02,385 INFO L168 Benchmark]: RCFGBuilder took 246.61 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 238.3 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-04-15 02:58:02,386 INFO L168 Benchmark]: TraceAbstraction took 4279.02 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 237.8 MB in the beginning and 202.5 MB in the end (delta: 35.3 MB). Peak memory consumption was 124.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:58:02,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.77 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.04 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 907.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 246.61 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 238.3 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4279.02 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 237.8 MB in the beginning and 202.5 MB in the end (delta: 35.3 MB). Peak memory consumption was 124.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4124.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 10.8ms, AutomataDifference: 1667.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 105.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2803.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 18.0ms SsaConstructionTime, 138.9ms SatisfiabilityAnalysisTime, 2070.5ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2145 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...