/usr/bin/java -Xmx8000000000 -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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:44:42,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:44:42,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:44:42,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:44:42,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:44:42,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:44:42,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:44:42,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:44:42,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:44:42,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:44:42,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:44:42,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:44:42,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:44:42,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:44:42,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:44:42,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:44:42,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:44:42,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:44:42,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:44:42,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:44:42,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:44:42,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:44:42,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:44:42,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:44:42,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:44:42,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:44:42,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:44:42,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:44:42,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:44:42,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-07-09 18:44:42,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:44:42,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:44:42,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:44:42,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:44:42,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:44:42,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:44:42,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:44:42,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:44:42,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:44:42,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:44:42,672 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:44:42,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:44:42,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:44:42,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:44:42,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:44:42,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:44:42,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:44:42,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:44:42,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:44:42,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:44:42,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:44:42,675 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:44:42,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:44:42,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:44:42,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:44:42,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:44:42,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:44:42,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:44:42,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:44:42,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:44:42,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:44:42,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:44:42,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:44:42,677 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:44:42,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:44:42,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:44:42,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:44:43,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:44:43,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:44:43,009 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:44:43,010 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:44:43,011 INFO L432 ainManager$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 [2021-07-09 18:44:43,011 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' [2021-07-09 18:44:43,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:44:43,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:44:43,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:44:43,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:44:43,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:44:43,052 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,060 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:44:43,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:44:43,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:44:43,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:44:43,076 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,076 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,077 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,078 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,082 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,086 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,087 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 09.07 06:44:43" (1/1) ... [2021-07-09 18:44:43,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:44:43,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:44:43,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:44:43,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:44:43,096 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 09.07 06:44:43" (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 [2021-07-09 18:44:43,167 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:44:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:44:43,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:44:43,168 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:44:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:44:43,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:44:43,168 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:44:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:44:43,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:44:43,169 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:44:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:44:43,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:44:43,169 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:44:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:44:43,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:44:43,170 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:44:43,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:44:43,449 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:44:43,450 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:44:43 BoogieIcfgContainer [2021-07-09 18:44:43,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:44:43,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:44:43,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:44:43,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:44:43,454 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 09.07 06:44:43" (1/2) ... [2021-07-09 18:44:43,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46438aef and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:44:43, skipping insertion in model container [2021-07-09 18:44:43,455 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 09.07 06:44:43" (2/2) ... [2021-07-09 18:44:43,456 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-07-09 18:44:43,460 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:44:43,461 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:44:43,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:44:43,461 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:44:43,503 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 18:44:43,522 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 18:44:43,538 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:44:43,538 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:44:43,538 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:44:43,539 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:44:43,539 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:44:43,539 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:44:43,539 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:44:43,539 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:44:43,547 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-07-09 18:44:43,585 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:44:43,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:43,627 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:43,628 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash 823600120, now seen corresponding path program 1 times [2021-07-09 18:44:43,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:43,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847823249] [2021-07-09 18:44:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:43,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:43,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847823249] [2021-07-09 18:44:43,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847823249] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:43,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:43,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:44:43,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252103201] [2021-07-09 18:44:43,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:44:43,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:43,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:44:43,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:44:43,814 INFO L87 Difference]: Start difference. First operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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) [2021-07-09 18:44:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:43,895 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-07-09 18:44:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:44:43,897 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 [2021-07-09 18:44:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:43,917 INFO L225 Difference]: With dead ends: 856 [2021-07-09 18:44:43,917 INFO L226 Difference]: Without dead ends: 731 [2021-07-09 18:44:43,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:44:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-07-09 18:44:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-07-09 18:44:44,032 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) [2021-07-09 18:44:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-07-09 18:44:44,038 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-07-09 18:44:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:44,039 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-07-09 18:44:44,039 INFO L483 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) [2021-07-09 18:44:44,040 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-07-09 18:44:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:44:44,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:44,045 INFO L508 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] [2021-07-09 18:44:44,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:44:44,045 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash -155633226, now seen corresponding path program 1 times [2021-07-09 18:44:44,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:44,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054414919] [2021-07-09 18:44:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:44,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:44,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054414919] [2021-07-09 18:44:44,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054414919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:44,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219742775] [2021-07-09 18:44:44,148 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 [2021-07-09 18:44:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:44,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:44:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:44,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219742775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:44,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:44,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-07-09 18:44:44,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66029356] [2021-07-09 18:44:44,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:44:44,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:44,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:44:44,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:44:44,354 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) [2021-07-09 18:44:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:44,516 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-07-09 18:44:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:44,517 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 [2021-07-09 18:44:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:44,530 INFO L225 Difference]: With dead ends: 1527 [2021-07-09 18:44:44,530 INFO L226 Difference]: Without dead ends: 1527 [2021-07-09 18:44:44,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:44:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-07-09 18:44:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-07-09 18:44:44,595 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) [2021-07-09 18:44:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-07-09 18:44:44,602 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-07-09 18:44:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:44,603 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-07-09 18:44:44,603 INFO L483 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) [2021-07-09 18:44:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-07-09 18:44:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:44:44,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:44,608 INFO L508 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] [2021-07-09 18:44:44,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:44:44,830 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1644542858, now seen corresponding path program 1 times [2021-07-09 18:44:44,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:44,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703411993] [2021-07-09 18:44:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:44,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:44,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703411993] [2021-07-09 18:44:44,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703411993] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:44,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:44,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:44:44,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023866154] [2021-07-09 18:44:44,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:44:44,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:44:44,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:44,930 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) [2021-07-09 18:44:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:45,027 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-07-09 18:44:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:45,028 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 [2021-07-09 18:44:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:45,035 INFO L225 Difference]: With dead ends: 1186 [2021-07-09 18:44:45,035 INFO L226 Difference]: Without dead ends: 1076 [2021-07-09 18:44:45,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:44:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-07-09 18:44:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-07-09 18:44:45,061 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) [2021-07-09 18:44:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-07-09 18:44:45,065 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-07-09 18:44:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:45,065 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-07-09 18:44:45,065 INFO L483 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) [2021-07-09 18:44:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-07-09 18:44:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:44:45,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:45,068 INFO L508 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] [2021-07-09 18:44:45,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:44:45,068 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash -985129002, now seen corresponding path program 2 times [2021-07-09 18:44:45,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:45,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032966103] [2021-07-09 18:44:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:45,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:45,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032966103] [2021-07-09 18:44:45,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032966103] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:45,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:45,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:44:45,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209076712] [2021-07-09 18:44:45,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:44:45,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:45,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:44:45,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:44:45,103 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) [2021-07-09 18:44:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:45,162 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-07-09 18:44:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:44:45,162 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 [2021-07-09 18:44:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:45,169 INFO L225 Difference]: With dead ends: 1022 [2021-07-09 18:44:45,170 INFO L226 Difference]: Without dead ends: 1022 [2021-07-09 18:44:45,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-07-09 18:44:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-07-09 18:44:45,198 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) [2021-07-09 18:44:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-07-09 18:44:45,203 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-07-09 18:44:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:45,203 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-07-09 18:44:45,203 INFO L483 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) [2021-07-09 18:44:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-07-09 18:44:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:44:45,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:45,206 INFO L508 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] [2021-07-09 18:44:45,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:44:45,208 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:45,208 INFO L82 PathProgramCache]: Analyzing trace with hash -964302818, now seen corresponding path program 2 times [2021-07-09 18:44:45,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:45,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816188199] [2021-07-09 18:44:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:45,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816188199] [2021-07-09 18:44:45,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816188199] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:45,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:45,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:44:45,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370504222] [2021-07-09 18:44:45,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:44:45,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:45,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:44:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:45,357 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) [2021-07-09 18:44:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:45,435 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-07-09 18:44:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:45,436 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 [2021-07-09 18:44:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:45,444 INFO L225 Difference]: With dead ends: 1324 [2021-07-09 18:44:45,444 INFO L226 Difference]: Without dead ends: 1288 [2021-07-09 18:44:45,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:44:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-09 18:44:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-07-09 18:44:45,475 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) [2021-07-09 18:44:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-07-09 18:44:45,480 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-07-09 18:44:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:45,480 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-07-09 18:44:45,481 INFO L483 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) [2021-07-09 18:44:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-07-09 18:44:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:44:45,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:45,484 INFO L508 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] [2021-07-09 18:44:45,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:44:45,485 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash 227514278, now seen corresponding path program 3 times [2021-07-09 18:44:45,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:45,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137917743] [2021-07-09 18:44:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:45,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:45,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137917743] [2021-07-09 18:44:45,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137917743] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:45,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:45,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:44:45,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847154435] [2021-07-09 18:44:45,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:44:45,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:45,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:44:45,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:44:45,560 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) [2021-07-09 18:44:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:45,627 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-07-09 18:44:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:44:45,628 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 [2021-07-09 18:44:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:45,636 INFO L225 Difference]: With dead ends: 1414 [2021-07-09 18:44:45,637 INFO L226 Difference]: Without dead ends: 1392 [2021-07-09 18:44:45,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-07-09 18:44:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-07-09 18:44:45,674 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) [2021-07-09 18:44:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-07-09 18:44:45,685 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-07-09 18:44:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:45,686 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-07-09 18:44:45,686 INFO L483 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) [2021-07-09 18:44:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-07-09 18:44:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:44:45,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:45,690 INFO L508 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] [2021-07-09 18:44:45,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:44:45,690 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash -162447450, now seen corresponding path program 4 times [2021-07-09 18:44:45,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:45,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860479233] [2021-07-09 18:44:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:45,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:45,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860479233] [2021-07-09 18:44:45,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860479233] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:45,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:45,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:44:45,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994728501] [2021-07-09 18:44:45,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:44:45,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:45,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:44:45,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:45,773 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) [2021-07-09 18:44:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:45,817 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-07-09 18:44:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:44:45,818 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 [2021-07-09 18:44:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:45,827 INFO L225 Difference]: With dead ends: 1451 [2021-07-09 18:44:45,827 INFO L226 Difference]: Without dead ends: 1451 [2021-07-09 18:44:45,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-07-09 18:44:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-07-09 18:44:45,873 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) [2021-07-09 18:44:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-07-09 18:44:45,879 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-07-09 18:44:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:45,880 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-07-09 18:44:45,880 INFO L483 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) [2021-07-09 18:44:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-07-09 18:44:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:44:45,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:45,885 INFO L508 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] [2021-07-09 18:44:45,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:44:45,885 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1818874838, now seen corresponding path program 1 times [2021-07-09 18:44:45,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:45,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345064262] [2021-07-09 18:44:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:46,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:46,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345064262] [2021-07-09 18:44:46,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345064262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828561672] [2021-07-09 18:44:46,012 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 [2021-07-09 18:44:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:44:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:46,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828561672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:46,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:46,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-07-09 18:44:46,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768425683] [2021-07-09 18:44:46,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:44:46,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:46,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:44:46,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:44:46,167 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) [2021-07-09 18:44:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:46,287 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-07-09 18:44:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:46,288 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 [2021-07-09 18:44:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:46,298 INFO L225 Difference]: With dead ends: 1625 [2021-07-09 18:44:46,299 INFO L226 Difference]: Without dead ends: 1546 [2021-07-09 18:44:46,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:44:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-07-09 18:44:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-07-09 18:44:46,335 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) [2021-07-09 18:44:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-07-09 18:44:46,341 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-07-09 18:44:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:46,341 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-07-09 18:44:46,342 INFO L483 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) [2021-07-09 18:44:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-07-09 18:44:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:44:46,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:46,346 INFO L508 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] [2021-07-09 18:44:46,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:46,569 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1325590424, now seen corresponding path program 2 times [2021-07-09 18:44:46,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:46,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769311965] [2021-07-09 18:44:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:46,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:46,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769311965] [2021-07-09 18:44:46,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769311965] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:46,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:46,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:44:46,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421207701] [2021-07-09 18:44:46,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:44:46,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:46,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:44:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:44:46,619 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) [2021-07-09 18:44:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:46,658 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-07-09 18:44:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:44:46,658 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 [2021-07-09 18:44:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:46,666 INFO L225 Difference]: With dead ends: 1338 [2021-07-09 18:44:46,666 INFO L226 Difference]: Without dead ends: 1338 [2021-07-09 18:44:46,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:44:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-07-09 18:44:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-07-09 18:44:46,698 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) [2021-07-09 18:44:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-07-09 18:44:46,703 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-07-09 18:44:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:46,703 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-07-09 18:44:46,703 INFO L483 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) [2021-07-09 18:44:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-07-09 18:44:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:44:46,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:46,707 INFO L508 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] [2021-07-09 18:44:46,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 18:44:46,708 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1169689052, now seen corresponding path program 1 times [2021-07-09 18:44:46,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:46,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860148133] [2021-07-09 18:44:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:46,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860148133] [2021-07-09 18:44:46,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860148133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130695703] [2021-07-09 18:44:46,785 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 [2021-07-09 18:44:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:44:46,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:46,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130695703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:46,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:46,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-07-09 18:44:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883909611] [2021-07-09 18:44:46,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:44:46,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:44:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:44:46,947 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) [2021-07-09 18:44:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:47,017 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-07-09 18:44:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:47,017 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 [2021-07-09 18:44:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:47,044 INFO L225 Difference]: With dead ends: 1711 [2021-07-09 18:44:47,044 INFO L226 Difference]: Without dead ends: 1659 [2021-07-09 18:44:47,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:44:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-07-09 18:44:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-07-09 18:44:47,076 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) [2021-07-09 18:44:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-07-09 18:44:47,084 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-07-09 18:44:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:47,085 INFO L482 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-07-09 18:44:47,085 INFO L483 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) [2021-07-09 18:44:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-07-09 18:44:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:44:47,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:47,090 INFO L508 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] [2021-07-09 18:44:47,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:44:47,313 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1094939800, now seen corresponding path program 3 times [2021-07-09 18:44:47,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:47,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406269217] [2021-07-09 18:44:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:47,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:47,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406269217] [2021-07-09 18:44:47,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406269217] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:44:47,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:44:47,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:44:47,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910502172] [2021-07-09 18:44:47,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:44:47,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:47,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:44:47,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:44:47,343 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) [2021-07-09 18:44:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:47,382 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-07-09 18:44:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:44:47,382 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 [2021-07-09 18:44:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:47,386 INFO L225 Difference]: With dead ends: 1111 [2021-07-09 18:44:47,386 INFO L226 Difference]: Without dead ends: 946 [2021-07-09 18:44:47,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-09 18:44:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-07-09 18:44:47,406 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) [2021-07-09 18:44:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-07-09 18:44:47,413 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-07-09 18:44:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:47,413 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-07-09 18:44:47,413 INFO L483 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) [2021-07-09 18:44:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-07-09 18:44:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:44:47,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:47,416 INFO L508 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] [2021-07-09 18:44:47,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 18:44:47,416 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1509885076, now seen corresponding path program 1 times [2021-07-09 18:44:47,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:47,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530296995] [2021-07-09 18:44:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:47,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:47,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530296995] [2021-07-09 18:44:47,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530296995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:47,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659651887] [2021-07-09 18:44:47,459 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 [2021-07-09 18:44:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:44:47,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:47,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659651887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:47,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:47,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-09 18:44:47,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644727019] [2021-07-09 18:44:47,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:44:47,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:47,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:44:47,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:44:47,567 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) [2021-07-09 18:44:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:47,641 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-07-09 18:44:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:47,642 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 [2021-07-09 18:44:47,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:47,652 INFO L225 Difference]: With dead ends: 2765 [2021-07-09 18:44:47,652 INFO L226 Difference]: Without dead ends: 2631 [2021-07-09 18:44:47,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:44:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-07-09 18:44:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-07-09 18:44:47,711 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) [2021-07-09 18:44:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-07-09 18:44:47,727 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-07-09 18:44:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:47,728 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-07-09 18:44:47,728 INFO L483 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) [2021-07-09 18:44:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-07-09 18:44:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:44:47,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:47,734 INFO L508 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] [2021-07-09 18:44:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:47,959 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash 64836562, now seen corresponding path program 2 times [2021-07-09 18:44:47,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:47,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592543693] [2021-07-09 18:44:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:44:48,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:48,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592543693] [2021-07-09 18:44:48,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592543693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:48,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362115819] [2021-07-09 18:44:48,034 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 [2021-07-09 18:44:48,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:44:48,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:44:48,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362115819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:48,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:48,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-07-09 18:44:48,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472483990] [2021-07-09 18:44:48,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:44:48,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:44:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:44:48,185 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-07-09 18:44:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:48,285 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-07-09 18:44:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:48,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2021-07-09 18:44:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:48,298 INFO L225 Difference]: With dead ends: 2660 [2021-07-09 18:44:48,298 INFO L226 Difference]: Without dead ends: 2660 [2021-07-09 18:44:48,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:44:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-07-09 18:44:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-07-09 18:44:48,371 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) [2021-07-09 18:44:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-07-09 18:44:48,380 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-07-09 18:44:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:48,381 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-07-09 18:44:48,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-07-09 18:44:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-07-09 18:44:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:44:48,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:48,389 INFO L508 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] [2021-07-09 18:44:48,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:44:48,605 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash 699229464, now seen corresponding path program 1 times [2021-07-09 18:44:48,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:48,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178160180] [2021-07-09 18:44:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:48,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:48,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178160180] [2021-07-09 18:44:48,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178160180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:48,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488996560] [2021-07-09 18:44:48,668 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 [2021-07-09 18:44:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:48,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:48,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:48,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488996560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:48,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:48,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 18:44:48,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763157901] [2021-07-09 18:44:48,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:44:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:48,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:44:48,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:44:48,808 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:48,875 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-07-09 18:44:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:44:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:44:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:48,885 INFO L225 Difference]: With dead ends: 2794 [2021-07-09 18:44:48,886 INFO L226 Difference]: Without dead ends: 2640 [2021-07-09 18:44:48,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:44:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-07-09 18:44:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-07-09 18:44:48,934 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) [2021-07-09 18:44:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-07-09 18:44:48,942 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-07-09 18:44:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:48,942 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-07-09 18:44:48,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-07-09 18:44:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:44:48,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:48,948 INFO L508 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] [2021-07-09 18:44:49,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:49,165 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash -971432828, now seen corresponding path program 2 times [2021-07-09 18:44:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:49,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382374084] [2021-07-09 18:44:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:49,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:49,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382374084] [2021-07-09 18:44:49,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382374084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:49,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520244248] [2021-07-09 18:44:49,227 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 [2021-07-09 18:44:49,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:49,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:44:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:49,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520244248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:49,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:49,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-07-09 18:44:49,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199015265] [2021-07-09 18:44:49,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:44:49,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:44:49,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:44:49,384 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) [2021-07-09 18:44:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:49,579 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-07-09 18:44:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:44:49,580 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 [2021-07-09 18:44:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:49,602 INFO L225 Difference]: With dead ends: 5257 [2021-07-09 18:44:49,603 INFO L226 Difference]: Without dead ends: 4937 [2021-07-09 18:44:49,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:44:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-07-09 18:44:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-07-09 18:44:49,705 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) [2021-07-09 18:44:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-07-09 18:44:49,718 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-07-09 18:44:49,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:49,718 INFO L482 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-07-09 18:44:49,718 INFO L483 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) [2021-07-09 18:44:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-07-09 18:44:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:44:49,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:49,727 INFO L508 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] [2021-07-09 18:44:49,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:44:49,941 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash -671881776, now seen corresponding path program 3 times [2021-07-09 18:44:49,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:49,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86908056] [2021-07-09 18:44:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:50,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:50,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86908056] [2021-07-09 18:44:50,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86908056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:50,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538950289] [2021-07-09 18:44:50,008 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 [2021-07-09 18:44:50,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:44:50,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:44:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:50,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538950289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:50,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:50,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 18:44:50,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176806344] [2021-07-09 18:44:50,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:44:50,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:44:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:44:50,157 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:50,888 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-07-09 18:44:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:44:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:44:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:50,940 INFO L225 Difference]: With dead ends: 11182 [2021-07-09 18:44:50,940 INFO L226 Difference]: Without dead ends: 10794 [2021-07-09 18:44:50,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-07-09 18:44:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-07-09 18:44:51,145 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) [2021-07-09 18:44:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-07-09 18:44:51,171 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-07-09 18:44:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:51,171 INFO L482 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-07-09 18:44:51,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-07-09 18:44:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:44:51,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:51,233 INFO L508 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] [2021-07-09 18:44:51,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:44:51,433 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash -905658986, now seen corresponding path program 4 times [2021-07-09 18:44:51,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:51,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710166268] [2021-07-09 18:44:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:51,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710166268] [2021-07-09 18:44:51,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710166268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:51,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043032096] [2021-07-09 18:44:51,484 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 [2021-07-09 18:44:51,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:44:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:51,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043032096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:51,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:51,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:44:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470154085] [2021-07-09 18:44:51,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:44:51,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:44:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:44:51,605 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) [2021-07-09 18:44:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:51,868 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-07-09 18:44:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:44:51,868 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 [2021-07-09 18:44:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:51,940 INFO L225 Difference]: With dead ends: 14551 [2021-07-09 18:44:51,941 INFO L226 Difference]: Without dead ends: 13651 [2021-07-09 18:44:51,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:44:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-07-09 18:44:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-07-09 18:44:52,272 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) [2021-07-09 18:44:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-07-09 18:44:52,311 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-07-09 18:44:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:52,311 INFO L482 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-07-09 18:44:52,311 INFO L483 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) [2021-07-09 18:44:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-07-09 18:44:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:44:52,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:52,336 INFO L508 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] [2021-07-09 18:44:52,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:44:52,553 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 291561130, now seen corresponding path program 5 times [2021-07-09 18:44:52,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:52,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897711417] [2021-07-09 18:44:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:52,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:52,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897711417] [2021-07-09 18:44:52,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897711417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:52,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164389231] [2021-07-09 18:44:52,604 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 [2021-07-09 18:44:52,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:44:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:44:52,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:52,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164389231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:52,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:52,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-09 18:44:52,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58779323] [2021-07-09 18:44:52,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:44:52,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:44:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:44:52,727 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) [2021-07-09 18:44:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:53,273 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-07-09 18:44:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:44:53,273 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 [2021-07-09 18:44:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:53,505 INFO L225 Difference]: With dead ends: 24527 [2021-07-09 18:44:53,505 INFO L226 Difference]: Without dead ends: 24223 [2021-07-09 18:44:53,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:44:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-07-09 18:44:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-07-09 18:44:54,166 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) [2021-07-09 18:44:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-07-09 18:44:54,244 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-07-09 18:44:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:54,244 INFO L482 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-07-09 18:44:54,244 INFO L483 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) [2021-07-09 18:44:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-07-09 18:44:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:44:54,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:54,291 INFO L508 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] [2021-07-09 18:44:54,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:44:54,495 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:54,496 INFO L82 PathProgramCache]: Analyzing trace with hash -166486102, now seen corresponding path program 6 times [2021-07-09 18:44:54,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:54,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916070217] [2021-07-09 18:44:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:54,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916070217] [2021-07-09 18:44:54,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916070217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171437305] [2021-07-09 18:44:54,571 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 [2021-07-09 18:44:54,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:54,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:44:54,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171437305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:54,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:54,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-07-09 18:44:54,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665609150] [2021-07-09 18:44:54,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:44:54,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:44:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:44:54,851 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) [2021-07-09 18:44:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:55,962 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-07-09 18:44:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:44:55,963 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 [2021-07-09 18:44:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:56,475 INFO L225 Difference]: With dead ends: 61524 [2021-07-09 18:44:56,476 INFO L226 Difference]: Without dead ends: 60380 [2021-07-09 18:44:56,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:44:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-07-09 18:44:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-07-09 18:44:58,069 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) [2021-07-09 18:44:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-07-09 18:44:58,447 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-07-09 18:44:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:58,447 INFO L482 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-07-09 18:44:58,447 INFO L483 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) [2021-07-09 18:44:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-07-09 18:44:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:44:58,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:58,549 INFO L508 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] [2021-07-09 18:44:58,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:58,751 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1888374044, now seen corresponding path program 7 times [2021-07-09 18:44:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:58,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558429897] [2021-07-09 18:44:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:58,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558429897] [2021-07-09 18:44:58,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558429897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:58,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390543681] [2021-07-09 18:44:58,814 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 [2021-07-09 18:44:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:58,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390543681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:58,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:58,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:44:58,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109382660] [2021-07-09 18:44:58,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:44:58,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:44:58,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:44:58,937 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) [2021-07-09 18:44:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:59,707 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-07-09 18:44:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:44:59,707 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 [2021-07-09 18:44:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:59,941 INFO L225 Difference]: With dead ends: 44403 [2021-07-09 18:44:59,941 INFO L226 Difference]: Without dead ends: 44271 [2021-07-09 18:44:59,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:44:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-07-09 18:45:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-07-09 18:45:01,123 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) [2021-07-09 18:45:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-07-09 18:45:01,320 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-07-09 18:45:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:01,320 INFO L482 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-07-09 18:45:01,320 INFO L483 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) [2021-07-09 18:45:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-07-09 18:45:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:45:01,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:01,687 INFO L508 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] [2021-07-09 18:45:01,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:01,912 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash -704126048, now seen corresponding path program 8 times [2021-07-09 18:45:01,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:01,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484975410] [2021-07-09 18:45:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:01,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484975410] [2021-07-09 18:45:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484975410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766792895] [2021-07-09 18:45:01,984 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 [2021-07-09 18:45:02,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:02,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:45:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:02,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766792895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:02,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:02,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-09 18:45:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121112299] [2021-07-09 18:45:02,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:45:02,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:45:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:45:02,115 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) [2021-07-09 18:45:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:03,579 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-07-09 18:45:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:45:03,579 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 [2021-07-09 18:45:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:04,188 INFO L225 Difference]: With dead ends: 66403 [2021-07-09 18:45:04,188 INFO L226 Difference]: Without dead ends: 64922 [2021-07-09 18:45:04,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:45:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-07-09 18:45:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-07-09 18:45:05,554 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) [2021-07-09 18:45:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-07-09 18:45:05,696 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-07-09 18:45:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:05,696 INFO L482 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-07-09 18:45:05,696 INFO L483 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) [2021-07-09 18:45:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-07-09 18:45:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:45:05,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:05,786 INFO L508 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] [2021-07-09 18:45:05,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:45:05,989 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:05,989 INFO L82 PathProgramCache]: Analyzing trace with hash 101455272, now seen corresponding path program 9 times [2021-07-09 18:45:05,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:05,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033871907] [2021-07-09 18:45:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:06,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:06,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033871907] [2021-07-09 18:45:06,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033871907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:06,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308077870] [2021-07-09 18:45:06,050 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 [2021-07-09 18:45:06,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:06,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:45:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:06,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308077870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:06,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:06,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:45:06,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164242821] [2021-07-09 18:45:06,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:45:06,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:45:06,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:45:06,444 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) [2021-07-09 18:45:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:07,739 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-07-09 18:45:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:45:07,739 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 [2021-07-09 18:45:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:08,063 INFO L225 Difference]: With dead ends: 67837 [2021-07-09 18:45:08,063 INFO L226 Difference]: Without dead ends: 67411 [2021-07-09 18:45:08,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 681.7ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:45:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-07-09 18:45:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-07-09 18:45:09,672 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) [2021-07-09 18:45:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-07-09 18:45:09,899 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-07-09 18:45:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:09,900 INFO L482 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-07-09 18:45:09,900 INFO L483 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) [2021-07-09 18:45:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-07-09 18:45:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:45:10,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:10,002 INFO L508 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] [2021-07-09 18:45:10,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:10,203 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash 903160218, now seen corresponding path program 10 times [2021-07-09 18:45:10,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:10,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21149111] [2021-07-09 18:45:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:10,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:10,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21149111] [2021-07-09 18:45:10,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21149111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:10,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541365251] [2021-07-09 18:45:10,264 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 [2021-07-09 18:45:10,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:10,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:45:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:45:10,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541365251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:10,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:10,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:45:10,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611686598] [2021-07-09 18:45:10,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:45:10,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:10,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:45:10,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:45:10,403 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 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) [2021-07-09 18:45:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:11,143 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-07-09 18:45:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:45:11,143 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 33 [2021-07-09 18:45:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:11,420 INFO L225 Difference]: With dead ends: 54540 [2021-07-09 18:45:11,420 INFO L226 Difference]: Without dead ends: 54365 [2021-07-09 18:45:11,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-07-09 18:45:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-07-09 18:45:12,812 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) [2021-07-09 18:45:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-07-09 18:45:13,328 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-07-09 18:45:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:13,328 INFO L482 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-07-09 18:45:13,328 INFO L483 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) [2021-07-09 18:45:13,328 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-07-09 18:45:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:45:13,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:13,474 INFO L508 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] [2021-07-09 18:45:13,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:45:13,675 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 108399622, now seen corresponding path program 11 times [2021-07-09 18:45:13,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:13,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150806839] [2021-07-09 18:45:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:13,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:13,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150806839] [2021-07-09 18:45:13,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150806839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:13,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247286040] [2021-07-09 18:45:13,743 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 [2021-07-09 18:45:13,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:45:13,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:13,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:45:13,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:45:13,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247286040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:13,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:13,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:45:13,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326721463] [2021-07-09 18:45:13,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:45:13,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:13,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:45:13,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:45:13,896 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) [2021-07-09 18:45:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:14,764 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-07-09 18:45:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:45:14,764 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 [2021-07-09 18:45:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:15,117 INFO L225 Difference]: With dead ends: 55576 [2021-07-09 18:45:15,117 INFO L226 Difference]: Without dead ends: 55382 [2021-07-09 18:45:15,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:45:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-07-09 18:45:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-07-09 18:45:16,597 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) [2021-07-09 18:45:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-07-09 18:45:17,110 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-07-09 18:45:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:17,110 INFO L482 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-07-09 18:45:17,110 INFO L483 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) [2021-07-09 18:45:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-07-09 18:45:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:45:17,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:17,291 INFO L508 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] [2021-07-09 18:45:17,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:17,492 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:17,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1275302974, now seen corresponding path program 12 times [2021-07-09 18:45:17,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:17,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325902550] [2021-07-09 18:45:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:17,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325902550] [2021-07-09 18:45:17,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325902550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15427602] [2021-07-09 18:45:17,553 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 [2021-07-09 18:45:17,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:45:17,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:17,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:45:17,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:45:17,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15427602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:17,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:17,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 18:45:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395094] [2021-07-09 18:45:17,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:45:17,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:45:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:45:17,696 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) [2021-07-09 18:45:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:20,138 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-07-09 18:45:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:45:20,138 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 [2021-07-09 18:45:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:21,408 INFO L225 Difference]: With dead ends: 141398 [2021-07-09 18:45:21,409 INFO L226 Difference]: Without dead ends: 140699 [2021-07-09 18:45:21,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:45:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-07-09 18:45:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-07-09 18:45:25,013 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) [2021-07-09 18:45:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-07-09 18:45:25,886 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-07-09 18:45:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:25,887 INFO L482 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-07-09 18:45:25,887 INFO L483 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) [2021-07-09 18:45:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-07-09 18:45:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:45:26,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:26,549 INFO L508 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] [2021-07-09 18:45:26,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:45:26,750 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2099123070, now seen corresponding path program 13 times [2021-07-09 18:45:26,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:26,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21684592] [2021-07-09 18:45:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:45:26,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:26,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21684592] [2021-07-09 18:45:26,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21684592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:26,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138727236] [2021-07-09 18:45:26,837 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 [2021-07-09 18:45:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:45:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:26,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138727236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:26,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:26,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-07-09 18:45:26,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596065871] [2021-07-09 18:45:26,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:45:26,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:45:26,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:26,979 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:30,024 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-07-09 18:45:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:45:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:45:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:31,892 INFO L225 Difference]: With dead ends: 205700 [2021-07-09 18:45:31,892 INFO L226 Difference]: Without dead ends: 204198 [2021-07-09 18:45:31,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:45:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-07-09 18:45:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-07-09 18:45:39,018 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) [2021-07-09 18:45:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-07-09 18:45:41,442 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-07-09 18:45:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:41,443 INFO L482 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-07-09 18:45:41,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-07-09 18:45:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:45:43,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:43,193 INFO L508 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] [2021-07-09 18:45:43,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:45:43,413 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -233402852, now seen corresponding path program 14 times [2021-07-09 18:45:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:43,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555545985] [2021-07-09 18:45:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:43,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555545985] [2021-07-09 18:45:43,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555545985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735473199] [2021-07-09 18:45:43,537 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 [2021-07-09 18:45:43,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:43,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:43,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:45:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:45:43,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735473199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:43,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:43,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-09 18:45:43,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732503452] [2021-07-09 18:45:43,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:45:43,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:43,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:45:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:45:43,819 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,229 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-07-09 18:45:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:45:51,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:45:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,966 INFO L225 Difference]: With dead ends: 389060 [2021-07-09 18:45:54,966 INFO L226 Difference]: Without dead ends: 387773 [2021-07-09 18:45:54,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:45:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-07-09 18:46:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-07-09 18:46:10,492 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) [2021-07-09 18:46:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-07-09 18:46:13,969 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-07-09 18:46:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:13,969 INFO L482 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-07-09 18:46:13,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-07-09 18:46:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:46:16,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:16,478 INFO L508 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] [2021-07-09 18:46:16,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:46:16,693 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash 828413272, now seen corresponding path program 15 times [2021-07-09 18:46:16,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:16,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679855664] [2021-07-09 18:46:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:16,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:16,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679855664] [2021-07-09 18:46:16,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679855664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765917913] [2021-07-09 18:46:16,791 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 [2021-07-09 18:46:16,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:16,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:46:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765917913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:16,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-09 18:46:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92871981] [2021-07-09 18:46:16,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:46:16,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:46:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:46:16,985 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) [2021-07-09 18:46:17,414 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 13