/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 05:34:24,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 05:34:24,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 05:34:24,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 05:34:24,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 05:34:24,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 05:34:24,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 05:34:24,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 05:34:25,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 05:34:25,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 05:34:25,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 05:34:25,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 05:34:25,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 05:34:25,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 05:34:25,036 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 05:34:25,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 05:34:25,037 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 05:34:25,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 05:34:25,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 05:34:25,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 05:34:25,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 05:34:25,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 05:34:25,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 05:34:25,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 05:34:25,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 05:34:25,039 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 05:34:25,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 05:34:25,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 05:34:25,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 05:34:25,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 05:34:25,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 05:34:25,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:34:25,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 05:34:25,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 05:34:25,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 05:34:25,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 05:34:25,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 05:34:25,042 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 05:34:25,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 05:34:25,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 05:34:25,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 05:34:25,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 05:34:25,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 05:34:25,546 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 05:34:25,548 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 05:34:25,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2021-04-15 05:34:25,549 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2021-04-15 05:34:25,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 05:34:25,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 05:34:25,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 05:34:25,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 05:34:25,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 05:34:25,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 05:34:25,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 05:34:25,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 05:34:25,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 05:34:25,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... [2021-04-15 05:34:25,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 05:34:25,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 05:34:25,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 05:34:25,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 05:34:25,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:34:25,761 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 05:34:25,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 05:34:25,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 05:34:25,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 05:34:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 05:34:25,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 05:34:25,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 05:34:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 05:34:25,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 05:34:25,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 05:34:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 05:34:25,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 05:34:25,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 05:34:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 05:34:25,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 05:34:25,763 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 05:34:25,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 05:34:25,991 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 05:34:25,993 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:34:25 BoogieIcfgContainer [2021-04-15 05:34:25,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 05:34:25,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 05:34:25,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 05:34:25,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 05:34:25,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:34:25" (1/2) ... [2021-04-15 05:34:26,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e374fd and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:34:25, skipping insertion in model container [2021-04-15 05:34:26,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:34:25" (2/2) ... [2021-04-15 05:34:26,001 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-04-15 05:34:26,007 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 05:34:26,008 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 05:34:26,012 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 05:34:26,013 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 05:34:26,113 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 05:34:26,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-04-15 05:34:26,173 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 05:34:26,173 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 05:34:26,173 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 05:34:26,174 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 05:34:26,174 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 05:34:26,174 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 05:34:26,174 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 05:34:26,174 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 05:34:26,187 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-04-15 05:34:26,263 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:34:26,294 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:26,295 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:26,296 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash -163076712, now seen corresponding path program 1 times [2021-04-15 05:34:26,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:26,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700614897] [2021-04-15 05:34:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:26,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700614897] [2021-04-15 05:34:26,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:26,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 05:34:26,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138715271] [2021-04-15 05:34:26,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 05:34:26,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:26,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 05:34:26,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:34:26,603 INFO L87 Difference]: Start difference. First operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:26,703 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-04-15 05:34:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 05:34:26,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 05:34:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:26,749 INFO L225 Difference]: With dead ends: 856 [2021-04-15 05:34:26,749 INFO L226 Difference]: Without dead ends: 731 [2021-04-15 05:34:26,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:34:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-04-15 05:34:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-04-15 05:34:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-04-15 05:34:26,902 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-04-15 05:34:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:26,905 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-04-15 05:34:26,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-04-15 05:34:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:34:26,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:26,912 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:26,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 05:34:26,913 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1142310058, now seen corresponding path program 1 times [2021-04-15 05:34:26,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:26,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778387444] [2021-04-15 05:34:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778387444] [2021-04-15 05:34:27,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246381295] [2021-04-15 05:34:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:34:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:27,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:27,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-04-15 05:34:27,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074407988] [2021-04-15 05:34:27,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:34:27,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:34:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:34:27,293 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:27,407 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-04-15 05:34:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:27,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:34:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:27,424 INFO L225 Difference]: With dead ends: 1527 [2021-04-15 05:34:27,424 INFO L226 Difference]: Without dead ends: 1527 [2021-04-15 05:34:27,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:34:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-04-15 05:34:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-04-15 05:34:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.77511961722488) internal successors, (3156), 836 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-04-15 05:34:27,488 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-04-15 05:34:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:27,489 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-04-15 05:34:27,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-04-15 05:34:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:34:27,498 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:27,500 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:27,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 05:34:27,705 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1324630694, now seen corresponding path program 1 times [2021-04-15 05:34:27,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:27,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927735106] [2021-04-15 05:34:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:27,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927735106] [2021-04-15 05:34:27,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:27,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:34:27,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529320080] [2021-04-15 05:34:27,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:34:27,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:34:27,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:27,804 INFO L87 Difference]: Start difference. First operand 837 states and 3156 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:27,930 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-04-15 05:34:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:34:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:27,944 INFO L225 Difference]: With dead ends: 1186 [2021-04-15 05:34:27,944 INFO L226 Difference]: Without dead ends: 1076 [2021-04-15 05:34:27,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:34:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-04-15 05:34:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-04-15 05:34:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.798507462686567) internal successors, (3054), 804 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-04-15 05:34:27,991 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-04-15 05:34:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:27,991 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-04-15 05:34:27,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-04-15 05:34:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:34:27,995 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:27,995 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:27,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 05:34:27,996 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1971805834, now seen corresponding path program 2 times [2021-04-15 05:34:27,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:27,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159002261] [2021-04-15 05:34:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159002261] [2021-04-15 05:34:28,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:28,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:34:28,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983707718] [2021-04-15 05:34:28,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:34:28,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:34:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:34:28,062 INFO L87 Difference]: Start difference. First operand 805 states and 3054 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:28,110 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-04-15 05:34:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 05:34:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:34:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:28,119 INFO L225 Difference]: With dead ends: 1022 [2021-04-15 05:34:28,119 INFO L226 Difference]: Without dead ends: 1022 [2021-04-15 05:34:28,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-04-15 05:34:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-04-15 05:34:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.75177304964539) internal successors, (3174), 846 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-04-15 05:34:28,172 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-04-15 05:34:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:28,173 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-04-15 05:34:28,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-04-15 05:34:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:34:28,177 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:28,177 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:28,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 05:34:28,178 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:28,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:28,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1776150594, now seen corresponding path program 2 times [2021-04-15 05:34:28,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:28,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60493791] [2021-04-15 05:34:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:28,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60493791] [2021-04-15 05:34:28,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:28,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:34:28,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951427895] [2021-04-15 05:34:28,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:34:28,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:28,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:34:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:28,271 INFO L87 Difference]: Start difference. First operand 847 states and 3174 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:28,381 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-04-15 05:34:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:28,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:34:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:28,392 INFO L225 Difference]: With dead ends: 1324 [2021-04-15 05:34:28,392 INFO L226 Difference]: Without dead ends: 1288 [2021-04-15 05:34:28,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:34:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-04-15 05:34:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-04-15 05:34:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.7387892376681613) internal successors, (3335), 892 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-04-15 05:34:28,437 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-04-15 05:34:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:28,437 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-04-15 05:34:28,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-04-15 05:34:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:34:28,444 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:28,444 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:28,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 05:34:28,444 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1017455134, now seen corresponding path program 3 times [2021-04-15 05:34:28,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:28,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987709000] [2021-04-15 05:34:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:28,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987709000] [2021-04-15 05:34:28,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:28,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:34:28,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515721571] [2021-04-15 05:34:28,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:34:28,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:28,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:34:28,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:34:28,509 INFO L87 Difference]: Start difference. First operand 893 states and 3335 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:28,576 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-04-15 05:34:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 05:34:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:34:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:28,587 INFO L225 Difference]: With dead ends: 1414 [2021-04-15 05:34:28,588 INFO L226 Difference]: Without dead ends: 1392 [2021-04-15 05:34:28,588 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-04-15 05:34:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-04-15 05:34:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.8140794223826715) internal successors, (4226), 1108 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-04-15 05:34:28,647 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-04-15 05:34:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:28,651 INFO L480 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-04-15 05:34:28,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-04-15 05:34:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:34:28,656 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:28,656 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:28,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 05:34:28,658 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1407416862, now seen corresponding path program 4 times [2021-04-15 05:34:28,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:28,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123104146] [2021-04-15 05:34:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:28,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123104146] [2021-04-15 05:34:28,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:28,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 05:34:28,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797098200] [2021-04-15 05:34:28,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:34:28,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:28,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:34:28,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:28,765 INFO L87 Difference]: Start difference. First operand 1109 states and 4226 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:28,825 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-04-15 05:34:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 05:34:28,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:34:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:28,837 INFO L225 Difference]: With dead ends: 1451 [2021-04-15 05:34:28,837 INFO L226 Difference]: Without dead ends: 1451 [2021-04-15 05:34:28,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-04-15 05:34:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-04-15 05:34:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.8230088495575223) internal successors, (4320), 1130 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-04-15 05:34:28,890 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-04-15 05:34:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:28,890 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-04-15 05:34:28,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-04-15 05:34:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:34:28,896 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:28,897 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:28,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 05:34:28,897 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash 832198006, now seen corresponding path program 1 times [2021-04-15 05:34:28,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:28,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379353357] [2021-04-15 05:34:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:29,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379353357] [2021-04-15 05:34:29,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438165572] [2021-04-15 05:34:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:34:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:29,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:29,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-04-15 05:34:29,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191048886] [2021-04-15 05:34:29,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:34:29,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:34:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:34:29,188 INFO L87 Difference]: Start difference. First operand 1131 states and 4320 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:29,303 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-04-15 05:34:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:34:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:29,316 INFO L225 Difference]: With dead ends: 1625 [2021-04-15 05:34:29,317 INFO L226 Difference]: Without dead ends: 1546 [2021-04-15 05:34:29,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-04-15 05:34:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-04-15 05:34:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.819158460161146) internal successors, (4266), 1117 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-04-15 05:34:29,392 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-04-15 05:34:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:29,392 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-04-15 05:34:29,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-04-15 05:34:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:34:29,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:29,396 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:29,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:29,617 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash 80621012, now seen corresponding path program 2 times [2021-04-15 05:34:29,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:29,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999943588] [2021-04-15 05:34:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:29,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999943588] [2021-04-15 05:34:29,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:29,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:34:29,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975004052] [2021-04-15 05:34:29,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:34:29,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:34:29,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:34:29,662 INFO L87 Difference]: Start difference. First operand 1118 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:29,706 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-04-15 05:34:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:34:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:34:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:29,717 INFO L225 Difference]: With dead ends: 1338 [2021-04-15 05:34:29,717 INFO L226 Difference]: Without dead ends: 1338 [2021-04-15 05:34:29,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:34:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-04-15 05:34:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-04-15 05:34:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.795936395759717) internal successors, (4297), 1132 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-04-15 05:34:29,773 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-04-15 05:34:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:29,773 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-04-15 05:34:29,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-04-15 05:34:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:34:29,783 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:29,783 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:29,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-04-15 05:34:29,784 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1880308832, now seen corresponding path program 1 times [2021-04-15 05:34:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:29,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172944213] [2021-04-15 05:34:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172944213] [2021-04-15 05:34:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164414644] [2021-04-15 05:34:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:34:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:30,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:30,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-04-15 05:34:30,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013058602] [2021-04-15 05:34:30,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:34:30,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:30,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:34:30,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:34:30,039 INFO L87 Difference]: Start difference. First operand 1133 states and 4297 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:30,122 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-04-15 05:34:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:30,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:34:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:30,135 INFO L225 Difference]: With dead ends: 1711 [2021-04-15 05:34:30,135 INFO L226 Difference]: Without dead ends: 1659 [2021-04-15 05:34:30,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:34:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-04-15 05:34:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-04-15 05:34:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.7871376811594204) internal successors, (4181), 1104 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-04-15 05:34:30,186 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-04-15 05:34:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:30,187 INFO L480 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-04-15 05:34:30,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-04-15 05:34:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:34:30,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:30,192 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:30,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 05:34:30,417 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1955058084, now seen corresponding path program 3 times [2021-04-15 05:34:30,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:30,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595845628] [2021-04-15 05:34:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:30,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595845628] [2021-04-15 05:34:30,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:34:30,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:34:30,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41443161] [2021-04-15 05:34:30,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:34:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:34:30,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:34:30,452 INFO L87 Difference]: Start difference. First operand 1105 states and 4181 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:30,497 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-04-15 05:34:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 05:34:30,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:34:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:30,513 INFO L225 Difference]: With dead ends: 1111 [2021-04-15 05:34:30,514 INFO L226 Difference]: Without dead ends: 946 [2021-04-15 05:34:30,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-04-15 05:34:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-04-15 05:34:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-04-15 05:34:30,549 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-04-15 05:34:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:30,549 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-04-15 05:34:30,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-04-15 05:34:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 05:34:30,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:30,553 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:30,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 05:34:30,553 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:30,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1889596984, now seen corresponding path program 1 times [2021-04-15 05:34:30,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:30,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884187191] [2021-04-15 05:34:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:30,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884187191] [2021-04-15 05:34:30,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272077169] [2021-04-15 05:34:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:30,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 05:34:30,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:30,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:30,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-04-15 05:34:30,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332585867] [2021-04-15 05:34:30,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:34:30,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:30,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:34:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:34:30,745 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:30,823 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-04-15 05:34:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-04-15 05:34:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:30,838 INFO L225 Difference]: With dead ends: 2765 [2021-04-15 05:34:30,838 INFO L226 Difference]: Without dead ends: 2631 [2021-04-15 05:34:30,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:34:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-04-15 05:34:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-04-15 05:34:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-04-15 05:34:30,963 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-04-15 05:34:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:30,964 INFO L480 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-04-15 05:34:30,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-04-15 05:34:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 05:34:30,971 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:30,971 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:31,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:31,185 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash 444548470, now seen corresponding path program 2 times [2021-04-15 05:34:31,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:31,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581525986] [2021-04-15 05:34:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:34:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581525986] [2021-04-15 05:34:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559492324] [2021-04-15 05:34:31,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:31,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:34:31,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:31,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 05:34:31,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:31,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-04-15 05:34:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494747746] [2021-04-15 05:34:31,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:34:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:34:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:34:31,404 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:31,532 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-04-15 05:34:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 05:34:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:31,544 INFO L225 Difference]: With dead ends: 2660 [2021-04-15 05:34:31,544 INFO L226 Difference]: Without dead ends: 2660 [2021-04-15 05:34:31,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-04-15 05:34:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-04-15 05:34:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-04-15 05:34:31,637 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-04-15 05:34:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:31,638 INFO L480 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-04-15 05:34:31,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-04-15 05:34:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 05:34:31,646 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:31,646 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:31,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 05:34:31,861 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1645018294, now seen corresponding path program 1 times [2021-04-15 05:34:31,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:31,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760639195] [2021-04-15 05:34:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:34:31,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760639195] [2021-04-15 05:34:31,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218221885] [2021-04-15 05:34:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:32,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:32,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 05:34:32,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106350885] [2021-04-15 05:34:32,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:34:32,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:34:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:34:32,074 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:32,153 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-04-15 05:34:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:34:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 05:34:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:32,166 INFO L225 Difference]: With dead ends: 2794 [2021-04-15 05:34:32,166 INFO L226 Difference]: Without dead ends: 2640 [2021-04-15 05:34:32,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:34:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-04-15 05:34:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-04-15 05:34:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-04-15 05:34:32,263 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-04-15 05:34:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:32,263 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-04-15 05:34:32,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-04-15 05:34:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 05:34:32,274 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:32,274 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:32,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:32,489 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1661082892, now seen corresponding path program 2 times [2021-04-15 05:34:32,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:32,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584731066] [2021-04-15 05:34:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:32,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584731066] [2021-04-15 05:34:32,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68431567] [2021-04-15 05:34:32,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:34:32,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:32,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:34:32,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:32,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:32,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-04-15 05:34:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306955616] [2021-04-15 05:34:32,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:34:32,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:32,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:34:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:34:32,718 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:32,858 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-04-15 05:34:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:34:32,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 05:34:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:32,913 INFO L225 Difference]: With dead ends: 5257 [2021-04-15 05:34:32,914 INFO L226 Difference]: Without dead ends: 4937 [2021-04-15 05:34:32,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:34:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-04-15 05:34:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-04-15 05:34:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-04-15 05:34:33,057 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-04-15 05:34:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:33,057 INFO L480 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-04-15 05:34:33,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-04-15 05:34:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:34:33,067 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:33,067 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:33,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 05:34:33,293 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:33,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1512383048, now seen corresponding path program 3 times [2021-04-15 05:34:33,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:33,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792313517] [2021-04-15 05:34:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:34:33,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792313517] [2021-04-15 05:34:33,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814589533] [2021-04-15 05:34:33,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:33,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:34:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:34:33,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:33,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-04-15 05:34:33,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242967262] [2021-04-15 05:34:33,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:34:33,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:33,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:34:33,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:34:33,568 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:34,305 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-04-15 05:34:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:34:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:34:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:34,372 INFO L225 Difference]: With dead ends: 11182 [2021-04-15 05:34:34,372 INFO L226 Difference]: Without dead ends: 10794 [2021-04-15 05:34:34,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:34:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-04-15 05:34:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-04-15 05:34:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-04-15 05:34:34,749 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-04-15 05:34:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:34,750 INFO L480 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-04-15 05:34:34,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-04-15 05:34:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:34:34,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:34,773 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:34,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 05:34:34,989 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1087882488, now seen corresponding path program 4 times [2021-04-15 05:34:34,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:34,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715217974] [2021-04-15 05:34:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:35,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715217974] [2021-04-15 05:34:35,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826991078] [2021-04-15 05:34:35,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:35,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:34:35,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:35,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:35,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:35,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 05:34:35,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168744182] [2021-04-15 05:34:35,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:35,202 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:35,520 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-04-15 05:34:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:34:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:34:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:35,617 INFO L225 Difference]: With dead ends: 14551 [2021-04-15 05:34:35,617 INFO L226 Difference]: Without dead ends: 13651 [2021-04-15 05:34:35,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:34:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-04-15 05:34:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-04-15 05:34:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-04-15 05:34:36,331 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-04-15 05:34:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:36,332 INFO L480 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-04-15 05:34:36,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-04-15 05:34:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:34:36,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:36,372 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:36,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 05:34:36,593 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash -96838436, now seen corresponding path program 5 times [2021-04-15 05:34:36,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:36,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918645517] [2021-04-15 05:34:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918645517] [2021-04-15 05:34:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362311633] [2021-04-15 05:34:36,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:36,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:34:36,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:36,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:36,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:36,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:36,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 05:34:36,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285507167] [2021-04-15 05:34:36,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:34:36,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:34:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:34:36,895 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:37,486 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-04-15 05:34:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:34:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:34:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:37,729 INFO L225 Difference]: With dead ends: 24527 [2021-04-15 05:34:37,730 INFO L226 Difference]: Without dead ends: 24223 [2021-04-15 05:34:37,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:34:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-04-15 05:34:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-04-15 05:34:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-04-15 05:34:38,623 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-04-15 05:34:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:38,623 INFO L480 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-04-15 05:34:38,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-04-15 05:34:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:34:38,675 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:38,675 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:38,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 05:34:38,901 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash -554885668, now seen corresponding path program 6 times [2021-04-15 05:34:38,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:38,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649026672] [2021-04-15 05:34:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:39,067 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-04-15 05:34:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:39,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649026672] [2021-04-15 05:34:39,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295618795] [2021-04-15 05:34:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:39,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:34:39,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:34:39,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:39,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-04-15 05:34:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074116313] [2021-04-15 05:34:39,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:39,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:39,259 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:40,438 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-04-15 05:34:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:34:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:34:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:40,787 INFO L225 Difference]: With dead ends: 61524 [2021-04-15 05:34:40,787 INFO L226 Difference]: Without dead ends: 60380 [2021-04-15 05:34:40,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 352.7ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:34:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-04-15 05:34:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-04-15 05:34:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-04-15 05:34:43,305 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-04-15 05:34:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:43,305 INFO L480 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-04-15 05:34:43,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-04-15 05:34:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:34:43,428 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:43,428 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:43,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:43,629 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1161623840, now seen corresponding path program 7 times [2021-04-15 05:34:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:43,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270181296] [2021-04-15 05:34:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:43,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270181296] [2021-04-15 05:34:43,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172214888] [2021-04-15 05:34:43,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:43,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:43,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:43,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 05:34:43,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297674503] [2021-04-15 05:34:43,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:43,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:43,849 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:44,344 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-04-15 05:34:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:34:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:34:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:44,974 INFO L225 Difference]: With dead ends: 44403 [2021-04-15 05:34:44,975 INFO L226 Difference]: Without dead ends: 44271 [2021-04-15 05:34:44,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-04-15 05:34:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-04-15 05:34:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-04-15 05:34:46,628 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-04-15 05:34:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:46,629 INFO L480 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-04-15 05:34:46,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-04-15 05:34:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:34:46,754 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:46,754 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:46,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:46,969 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1949095460, now seen corresponding path program 8 times [2021-04-15 05:34:46,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:46,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057472457] [2021-04-15 05:34:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057472457] [2021-04-15 05:34:47,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566214824] [2021-04-15 05:34:47,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:47,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:34:47,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:47,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:47,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-04-15 05:34:47,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146256773] [2021-04-15 05:34:47,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:34:47,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:34:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:34:47,197 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:47,633 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-04-15 05:34:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:49,123 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-04-15 05:34:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 05:34:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:34:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:49,491 INFO L225 Difference]: With dead ends: 66403 [2021-04-15 05:34:49,492 INFO L226 Difference]: Without dead ends: 64922 [2021-04-15 05:34:49,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 777.1ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:34:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-04-15 05:34:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-04-15 05:34:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-04-15 05:34:51,238 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-04-15 05:34:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:51,238 INFO L480 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-04-15 05:34:51,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-04-15 05:34:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 05:34:51,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:51,341 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:51,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 05:34:51,544 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1143514140, now seen corresponding path program 9 times [2021-04-15 05:34:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:51,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393208600] [2021-04-15 05:34:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393208600] [2021-04-15 05:34:51,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956864335] [2021-04-15 05:34:51,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:51,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:34:51,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:34:51,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:51,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 05:34:51,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661298192] [2021-04-15 05:34:51,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:51,744 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:53,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:53,157 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-04-15 05:34:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:34:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 05:34:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:53,501 INFO L225 Difference]: With dead ends: 67837 [2021-04-15 05:34:53,501 INFO L226 Difference]: Without dead ends: 67411 [2021-04-15 05:34:53,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 417.3ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:34:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-04-15 05:34:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-04-15 05:34:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-04-15 05:34:55,247 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-04-15 05:34:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:55,247 INFO L480 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-04-15 05:34:55,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-04-15 05:34:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 05:34:55,362 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:55,362 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:55,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:55,564 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:55,564 INFO L82 PathProgramCache]: Analyzing trace with hash -651453626, now seen corresponding path program 10 times [2021-04-15 05:34:55,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:55,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113118272] [2021-04-15 05:34:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:34:55,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113118272] [2021-04-15 05:34:55,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036043705] [2021-04-15 05:34:55,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:55,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:34:55,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:55,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:34:55,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:55,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 05:34:55,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673533003] [2021-04-15 05:34:55,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:55,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:55,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:55,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:55,791 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:56,766 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-04-15 05:34:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:34:56,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 05:34:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:57,056 INFO L225 Difference]: With dead ends: 54540 [2021-04-15 05:34:57,056 INFO L226 Difference]: Without dead ends: 54365 [2021-04-15 05:34:57,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:34:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-04-15 05:34:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-04-15 05:34:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-04-15 05:34:58,735 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-04-15 05:34:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:58,735 INFO L480 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-04-15 05:34:58,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-04-15 05:34:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 05:34:58,864 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:58,864 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:59,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 05:34:59,065 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1136569790, now seen corresponding path program 11 times [2021-04-15 05:34:59,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:59,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470485835] [2021-04-15 05:34:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:34:59,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470485835] [2021-04-15 05:34:59,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124688009] [2021-04-15 05:34:59,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:59,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:34:59,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:59,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:34:59,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:34:59,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:59,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 05:34:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142973591] [2021-04-15 05:34:59,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:59,263 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:00,273 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-04-15 05:35:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:35:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 05:35:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:00,550 INFO L225 Difference]: With dead ends: 55576 [2021-04-15 05:35:00,551 INFO L226 Difference]: Without dead ends: 55382 [2021-04-15 05:35:00,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:35:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-04-15 05:35:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-04-15 05:35:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44604 states, 44603 states have (on average 4.71378606820169) internal successors, (210249), 44603 states have internal predecessors, (210249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-04-15 05:35:02,462 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-04-15 05:35:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:02,462 INFO L480 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-04-15 05:35:02,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-04-15 05:35:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 05:35:02,611 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:02,611 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:02,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:02,816 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:02,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:02,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1774694910, now seen corresponding path program 12 times [2021-04-15 05:35:02,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:02,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576048602] [2021-04-15 05:35:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:35:02,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576048602] [2021-04-15 05:35:02,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948024989] [2021-04-15 05:35:02,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:02,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 05:35:02,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:02,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:35:03,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:03,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 05:35:03,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119663888] [2021-04-15 05:35:03,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:35:03,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:03,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:35:03,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:35:03,044 INFO L87 Difference]: Start difference. First operand 44604 states and 210249 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:05,448 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-04-15 05:35:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:35:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 05:35:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:07,052 INFO L225 Difference]: With dead ends: 141398 [2021-04-15 05:35:07,052 INFO L226 Difference]: Without dead ends: 140699 [2021-04-15 05:35:07,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:35:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-04-15 05:35:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-04-15 05:35:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85571 states, 85570 states have (on average 4.762369989482295) internal successors, (407516), 85570 states have internal predecessors, (407516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-04-15 05:35:11,580 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-04-15 05:35:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:11,581 INFO L480 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-04-15 05:35:11,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-04-15 05:35:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-04-15 05:35:11,884 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:11,884 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:12,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 05:35:12,093 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash -908424846, now seen corresponding path program 13 times [2021-04-15 05:35:12,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:12,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789145553] [2021-04-15 05:35:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:35:12,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789145553] [2021-04-15 05:35:12,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045700451] [2021-04-15 05:35:12,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:12,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:12,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-04-15 05:35:12,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252015082] [2021-04-15 05:35:12,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:12,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:12,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:12,348 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:16,475 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-04-15 05:35:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:35:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-04-15 05:35:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:17,870 INFO L225 Difference]: With dead ends: 205700 [2021-04-15 05:35:17,870 INFO L226 Difference]: Without dead ends: 204198 [2021-04-15 05:35:17,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:35:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-04-15 05:35:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-04-15 05:35:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179419 states, 179418 states have (on average 4.730361502190416) internal successors, (848712), 179418 states have internal predecessors, (848712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-04-15 05:35:28,022 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-04-15 05:35:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:28,022 INFO L480 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-04-15 05:35:28,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-04-15 05:35:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-04-15 05:35:28,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:28,663 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:28,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 05:35:28,865 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1478372264, now seen corresponding path program 14 times [2021-04-15 05:35:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:28,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419517090] [2021-04-15 05:35:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:28,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419517090] [2021-04-15 05:35:28,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619467346] [2021-04-15 05:35:28,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:29,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:35:29,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:29,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:35:29,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 05:35:29,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:29,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-04-15 05:35:29,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805595165] [2021-04-15 05:35:29,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:35:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:35:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:35:29,096 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:35,393 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-04-15 05:35:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:35:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-04-15 05:35:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:38,173 INFO L225 Difference]: With dead ends: 389060 [2021-04-15 05:35:38,173 INFO L226 Difference]: Without dead ends: 387773 [2021-04-15 05:35:38,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:35:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-04-15 05:35:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-04-15 05:35:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285677 states, 285676 states have (on average 4.812798414987609) internal successors, (1374901), 285676 states have internal predecessors, (1374901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-04-15 05:35:55,353 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-04-15 05:35:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:55,353 INFO L480 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-04-15 05:35:55,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-04-15 05:35:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-04-15 05:35:57,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:57,635 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:57,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 05:35:57,849 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash 828413272, now seen corresponding path program 15 times [2021-04-15 05:35:57,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:57,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904160847] [2021-04-15 05:35:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:57,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904160847] [2021-04-15 05:35:57,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053706536] [2021-04-15 05:35:57,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:57,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:35:57,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 05:35:58,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:58,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-04-15 05:35:58,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468216120] [2021-04-15 05:35:58,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:35:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:58,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:35:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:35:58,068 INFO L87 Difference]: Start difference. First operand 285677 states and 1374901 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:19,741 INFO L93 Difference]: Finished difference Result 1050714 states and 4955717 transitions. [2021-04-15 05:36:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 05:36:19,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-04-15 05:36:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:30,725 INFO L225 Difference]: With dead ends: 1050714 [2021-04-15 05:36:30,725 INFO L226 Difference]: Without dead ends: 1048522 [2021-04-15 05:36:30,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 699.4ms TimeCoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 05:36:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048522 states. [2021-04-15 05:37:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048522 to 706654. [2021-04-15 05:37:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706654 states, 706653 states have (on average 4.956557178700154) internal successors, (3502566), 706653 states have internal predecessors, (3502566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706654 states to 706654 states and 3502566 transitions. [2021-04-15 05:37:27,404 INFO L78 Accepts]: Start accepts. Automaton has 706654 states and 3502566 transitions. Word has length 35 [2021-04-15 05:37:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:27,404 INFO L480 AbstractCegarLoop]: Abstraction has 706654 states and 3502566 transitions. [2021-04-15 05:37:27,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 706654 states and 3502566 transitions. [2021-04-15 05:37:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-04-15 05:37:30,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:30,849 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:31,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 05:37:31,050 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:31,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1638836116, now seen corresponding path program 16 times [2021-04-15 05:37:31,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:31,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605413304] [2021-04-15 05:37:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:37:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605413304] [2021-04-15 05:37:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584095267] [2021-04-15 05:37:31,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:31,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:37:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:37:31,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:37:31,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:31,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-04-15 05:37:31,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869556265] [2021-04-15 05:37:31,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:37:31,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:31,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:37:31,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:37:31,250 INFO L87 Difference]: Start difference. First operand 706654 states and 3502566 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:49,902 INFO L93 Difference]: Finished difference Result 955483 states and 4512570 transitions. [2021-04-15 05:37:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:37:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-04-15 05:37:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:59,985 INFO L225 Difference]: With dead ends: 955483 [2021-04-15 05:37:59,985 INFO L226 Difference]: Without dead ends: 947993 [2021-04-15 05:37:59,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 05:38:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947993 states. [2021-04-15 05:38:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947993 to 704846. [2021-04-15 05:38:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704846 states, 704845 states have (on average 4.933249154069334) internal successors, (3477176), 704845 states have internal predecessors, (3477176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704846 states to 704846 states and 3477176 transitions. [2021-04-15 05:38:42,862 INFO L78 Accepts]: Start accepts. Automaton has 704846 states and 3477176 transitions. Word has length 35 [2021-04-15 05:38:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:42,863 INFO L480 AbstractCegarLoop]: Abstraction has 704846 states and 3477176 transitions. [2021-04-15 05:38:42,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 704846 states and 3477176 transitions. [2021-04-15 05:38:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-04-15 05:38:48,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:48,445 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:48,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 05:38:48,661 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1224532632, now seen corresponding path program 17 times [2021-04-15 05:38:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:48,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017586605] [2021-04-15 05:38:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:38:48,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017586605] [2021-04-15 05:38:48,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757628974] [2021-04-15 05:38:48,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:48,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:38:48,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 05:38:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:38:48,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:48,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 05:38:48,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962387767] [2021-04-15 05:38:48,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:38:48,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:48,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:38:48,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:48,958 INFO L87 Difference]: Start difference. First operand 704846 states and 3477176 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)