/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:40:56,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:40:56,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:40:56,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:40:57,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 21:40:57,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 21:40:57,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 21:40:57,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 21:40:57,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 21:40:57,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 21:40:57,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 21:40:57,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 21:40:57,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 21:40:57,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 21:40:57,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 21:40:57,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 21:40:57,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 21:40:57,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 21:40:57,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 21:40:57,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 21:40:57,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 21:40:57,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 21:40:57,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 21:40:57,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 21:40:57,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 21:40:57,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 21:40:57,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 21:40:57,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 21:40:57,021 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 [2021-06-05 21:40:57,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:40:57,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:40:57,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:40:57,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:40:57,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:40:57,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:40:57,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:40:57,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:40:57,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:40:57,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:40:57,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:40:57,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:40:57,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:40:57,043 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:40:57,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:40:57,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:40:57,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:40:57,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:40:57,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:40:57,252 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:40:57,254 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:40:57,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl [2021-06-05 21:40:57,255 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2021-06-05 21:40:57,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:40:57,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:40:57,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:40:57,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:40:57,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:40:57,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:40:57,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:40:57,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:40:57,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:40:57,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... [2021-06-05 21:40:57,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:40:57,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:40:57,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:40:57,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:40:57,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:40:57,399 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:40:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:40:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:40:57,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:40:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:40:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:40:57,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:40:57,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:40:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:40:57,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:40:57,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:40:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:40:57,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 21:40:57,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 21:40:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 21:40:57,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 21:40:57,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 21:40:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 21:40:57,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 21:40:57,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 21:40:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 21:40:57,403 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:40:57,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:40:57,561 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 21:40:57,562 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 21:40:57,562 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 21:40:57,562 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 21:40:57,562 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 21:40:57,563 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 21:40:57,563 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 21:40:57,564 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:40:57 BoogieIcfgContainer [2021-06-05 21:40:57,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:40:57,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:40:57,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:40:57,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:40:57,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:57" (1/2) ... [2021-06-05 21:40:57,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fae170 and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:40:57, skipping insertion in model container [2021-06-05 21:40:57,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:40:57" (2/2) ... [2021-06-05 21:40:57,585 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2021-06-05 21:40:57,589 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:40:57,589 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:40:57,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:40:57,590 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:40:57,672 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-06-05 21:40:57,685 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 21:40:57,696 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:40:57,696 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:40:57,696 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:40:57,696 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:40:57,696 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:40:57,696 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:40:57,696 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:40:57,696 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:40:57,702 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2021-06-05 21:40:57,723 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:40:57,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:57,734 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:57,735 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:40:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash 336800480, now seen corresponding path program 1 times [2021-06-05 21:40:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:57,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447533380] [2021-06-05 21:40:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:57,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447533380] [2021-06-05 21:40:57,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447533380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:57,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:57,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:40:57,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288835061] [2021-06-05 21:40:57,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:40:57,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:40:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:57,845 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 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), 2 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) [2021-06-05 21:40:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:57,870 INFO L93 Difference]: Finished difference Result 382 states and 2054 transitions. [2021-06-05 21:40:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:40:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 [2021-06-05 21:40:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:57,881 INFO L225 Difference]: With dead ends: 382 [2021-06-05 21:40:57,881 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 21:40:57,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 21:40:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-06-05 21:40:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 5.458745874587459) internal successors, (1654), 303 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1654 transitions. [2021-06-05 21:40:57,955 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1654 transitions. Word has length 21 [2021-06-05 21:40:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:57,955 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 1654 transitions. [2021-06-05 21:40:57,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2021-06-05 21:40:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1654 transitions. [2021-06-05 21:40:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:57,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:57,963 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:57,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:40:57,963 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:40:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1957873019, now seen corresponding path program 1 times [2021-06-05 21:40:57,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:57,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614645549] [2021-06-05 21:40:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:58,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:58,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614645549] [2021-06-05 21:40:58,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614645549] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:58,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:58,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:40:58,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097419056] [2021-06-05 21:40:58,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:40:58,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:58,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:40:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:58,030 INFO L87 Difference]: Start difference. First operand 304 states and 1654 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:58,055 INFO L93 Difference]: Finished difference Result 551 states and 3079 transitions. [2021-06-05 21:40:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:40:58,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:58,061 INFO L225 Difference]: With dead ends: 551 [2021-06-05 21:40:58,062 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 21:40:58,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 21:40:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2021-06-05 21:40:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 5.598802395209581) internal successors, (2805), 501 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 2805 transitions. [2021-06-05 21:40:58,095 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 2805 transitions. Word has length 22 [2021-06-05 21:40:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:58,095 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 2805 transitions. [2021-06-05 21:40:58,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 2805 transitions. [2021-06-05 21:40:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:40:58,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:58,098 INFO L554 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] [2021-06-05 21:40:58,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:40:58,099 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:40:58,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:58,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1560108314, now seen corresponding path program 1 times [2021-06-05 21:40:58,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:58,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999205970] [2021-06-05 21:40:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:40:58,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:58,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999205970] [2021-06-05 21:40:58,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999205970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:58,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:58,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:40:58,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867231388] [2021-06-05 21:40:58,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:40:58,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:58,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:40:58,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:58,137 INFO L87 Difference]: Start difference. First operand 502 states and 2805 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2021-06-05 21:40:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:58,152 INFO L93 Difference]: Finished difference Result 989 states and 5577 transitions. [2021-06-05 21:40:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:40:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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 [2021-06-05 21:40:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:58,159 INFO L225 Difference]: With dead ends: 989 [2021-06-05 21:40:58,159 INFO L226 Difference]: Without dead ends: 859 [2021-06-05 21:40:58,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-06-05 21:40:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-06-05 21:40:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 5.6678321678321675) internal successors, (4863), 858 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2021-06-05 21:40:58,189 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2021-06-05 21:40:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:58,189 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2021-06-05 21:40:58,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2021-06-05 21:40:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2021-06-05 21:40:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:40:58,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:58,193 INFO L554 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] [2021-06-05 21:40:58,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:40:58,193 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:40:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:58,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1404106583, now seen corresponding path program 1 times [2021-06-05 21:40:58,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:58,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145784797] [2021-06-05 21:40:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:40:58,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145784797] [2021-06-05 21:40:58,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145784797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304408162] [2021-06-05 21:40:58,246 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 [2021-06-05 21:40:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:58,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:40:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:40:58,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304408162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:58,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:58,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 21:40:58,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911526424] [2021-06-05 21:40:58,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:40:58,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:40:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:40:58,451 INFO L87 Difference]: Start difference. First operand 859 states and 4863 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:58,577 INFO L93 Difference]: Finished difference Result 2168 states and 12284 transitions. [2021-06-05 21:40:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:40:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:40:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:58,589 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 21:40:58,589 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 21:40:58,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 21:40:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 614. [2021-06-05 21:40:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 5.634584013050571) internal successors, (3454), 613 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 3454 transitions. [2021-06-05 21:40:58,612 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 3454 transitions. Word has length 24 [2021-06-05 21:40:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:58,612 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 3454 transitions. [2021-06-05 21:40:58,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 3454 transitions. [2021-06-05 21:40:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:40:58,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:58,614 INFO L554 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] [2021-06-05 21:40:58,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:58,835 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:40:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:58,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1358128455, now seen corresponding path program 1 times [2021-06-05 21:40:58,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:58,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375189506] [2021-06-05 21:40:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:40:58,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:58,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375189506] [2021-06-05 21:40:58,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375189506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:58,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066541738] [2021-06-05 21:40:58,869 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 [2021-06-05 21:40:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:40:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:40:58,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066541738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:58,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:58,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 21:40:58,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551606146] [2021-06-05 21:40:58,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:40:58,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:40:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:40:58,954 INFO L87 Difference]: Start difference. First operand 614 states and 3454 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:59,034 INFO L93 Difference]: Finished difference Result 1659 states and 9450 transitions. [2021-06-05 21:40:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:40:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:40:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:59,041 INFO L225 Difference]: With dead ends: 1659 [2021-06-05 21:40:59,041 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 21:40:59,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 21:40:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 760. [2021-06-05 21:40:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 5.664031620553359) internal successors, (4299), 759 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 4299 transitions. [2021-06-05 21:40:59,062 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 4299 transitions. Word has length 24 [2021-06-05 21:40:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:59,062 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 4299 transitions. [2021-06-05 21:40:59,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 4299 transitions. [2021-06-05 21:40:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:40:59,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:59,064 INFO L554 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] [2021-06-05 21:40:59,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:59,273 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:40:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1283985542, now seen corresponding path program 1 times [2021-06-05 21:40:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:59,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293568134] [2021-06-05 21:40:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:40:59,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:59,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293568134] [2021-06-05 21:40:59,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293568134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:59,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018732435] [2021-06-05 21:40:59,295 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 [2021-06-05 21:40:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:59,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:40:59,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:40:59,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018732435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:59,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:59,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 21:40:59,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016022518] [2021-06-05 21:40:59,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:40:59,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:59,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:40:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:40:59,377 INFO L87 Difference]: Start difference. First operand 760 states and 4299 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2021-06-05 21:40:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:59,476 INFO L93 Difference]: Finished difference Result 2539 states and 14502 transitions. [2021-06-05 21:40:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:40:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 25 [2021-06-05 21:40:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:59,487 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 21:40:59,487 INFO L226 Difference]: Without dead ends: 1460 [2021-06-05 21:40:59,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-06-05 21:40:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-06-05 21:40:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.748457847840987) internal successors, (8387), 1459 states have internal predecessors, (8387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2021-06-05 21:40:59,522 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 25 [2021-06-05 21:40:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:59,522 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2021-06-05 21:40:59,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2021-06-05 21:40:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2021-06-05 21:40:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:40:59,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:59,526 INFO L554 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] [2021-06-05 21:40:59,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:59,741 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:40:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:59,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1790951632, now seen corresponding path program 1 times [2021-06-05 21:40:59,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:59,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520669584] [2021-06-05 21:40:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:40:59,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:59,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520669584] [2021-06-05 21:40:59,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520669584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:59,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177810645] [2021-06-05 21:40:59,801 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 [2021-06-05 21:40:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:59,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:40:59,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177810645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:59,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:59,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-05 21:40:59,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909961353] [2021-06-05 21:40:59,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:40:59,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:59,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:40:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:40:59,932 INFO L87 Difference]: Start difference. First operand 1460 states and 8387 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-05 21:41:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:00,120 INFO L93 Difference]: Finished difference Result 7036 states and 40197 transitions. [2021-06-05 21:41:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:41:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 27 [2021-06-05 21:41:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:00,156 INFO L225 Difference]: With dead ends: 7036 [2021-06-05 21:41:00,156 INFO L226 Difference]: Without dead ends: 5971 [2021-06-05 21:41:00,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:41:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-06-05 21:41:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 3455. [2021-06-05 21:41:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 6.335552982049798) internal successors, (21883), 3454 states have internal predecessors, (21883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 21883 transitions. [2021-06-05 21:41:00,348 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 21883 transitions. Word has length 27 [2021-06-05 21:41:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:00,348 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 21883 transitions. [2021-06-05 21:41:00,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-05 21:41:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 21883 transitions. [2021-06-05 21:41:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:41:00,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:00,359 INFO L554 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] [2021-06-05 21:41:00,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:00,586 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash -97672488, now seen corresponding path program 2 times [2021-06-05 21:41:00,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:00,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053430601] [2021-06-05 21:41:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:41:00,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:00,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053430601] [2021-06-05 21:41:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053430601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:00,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340629873] [2021-06-05 21:41:00,654 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 [2021-06-05 21:41:00,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:00,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:00,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340629873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:00,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:00,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-05 21:41:00,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158904524] [2021-06-05 21:41:00,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:41:00,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:00,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:41:00,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:41:00,771 INFO L87 Difference]: Start difference. First operand 3455 states and 21883 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-05 21:41:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:00,965 INFO L93 Difference]: Finished difference Result 12126 states and 75417 transitions. [2021-06-05 21:41:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:41:00,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 27 [2021-06-05 21:41:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:01,068 INFO L225 Difference]: With dead ends: 12126 [2021-06-05 21:41:01,069 INFO L226 Difference]: Without dead ends: 10635 [2021-06-05 21:41:01,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:41:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2021-06-05 21:41:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 6709. [2021-06-05 21:41:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 6.719886702444842) internal successors, (45077), 6708 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45077 transitions. [2021-06-05 21:41:01,389 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45077 transitions. Word has length 27 [2021-06-05 21:41:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:01,389 INFO L482 AbstractCegarLoop]: Abstraction has 6709 states and 45077 transitions. [2021-06-05 21:41:01,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-05 21:41:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45077 transitions. [2021-06-05 21:41:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:01,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:01,424 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:41:01,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:01,637 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash 329078829, now seen corresponding path program 3 times [2021-06-05 21:41:01,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:01,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896446867] [2021-06-05 21:41:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:01,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:01,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896446867] [2021-06-05 21:41:01,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896446867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386795841] [2021-06-05 21:41:01,673 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 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 [2021-06-05 21:41:01,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:41:01,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:01,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:01,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386795841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:01,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:01,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:01,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689033030] [2021-06-05 21:41:01,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:01,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:01,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:01,834 INFO L87 Difference]: Start difference. First operand 6709 states and 45077 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-05 21:41:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:01,978 INFO L93 Difference]: Finished difference Result 10641 states and 67958 transitions. [2021-06-05 21:41:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 28 [2021-06-05 21:41:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:02,013 INFO L225 Difference]: With dead ends: 10641 [2021-06-05 21:41:02,013 INFO L226 Difference]: Without dead ends: 8426 [2021-06-05 21:41:02,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:02,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-06-05 21:41:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6226. [2021-06-05 21:41:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.617510040160642) internal successors, (41194), 6225 states have internal predecessors, (41194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41194 transitions. [2021-06-05 21:41:02,311 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41194 transitions. Word has length 28 [2021-06-05 21:41:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:02,312 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 41194 transitions. [2021-06-05 21:41:02,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-05 21:41:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41194 transitions. [2021-06-05 21:41:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:02,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:02,339 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:41:02,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:02,553 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash 589935477, now seen corresponding path program 4 times [2021-06-05 21:41:02,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:02,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196338961] [2021-06-05 21:41:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:02,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196338961] [2021-06-05 21:41:02,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196338961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133362902] [2021-06-05 21:41:02,588 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 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 [2021-06-05 21:41:02,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:41:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:02,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133362902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:02,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:02,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:02,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548791316] [2021-06-05 21:41:02,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:02,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:02,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:02,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:02,701 INFO L87 Difference]: Start difference. First operand 6226 states and 41194 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2021-06-05 21:41:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:02,910 INFO L93 Difference]: Finished difference Result 11692 states and 73874 transitions. [2021-06-05 21:41:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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 28 [2021-06-05 21:41:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:02,941 INFO L225 Difference]: With dead ends: 11692 [2021-06-05 21:41:02,941 INFO L226 Difference]: Without dead ends: 7762 [2021-06-05 21:41:02,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-06-05 21:41:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 6226. [2021-06-05 21:41:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.525622489959839) internal successors, (40622), 6225 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40622 transitions. [2021-06-05 21:41:03,191 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40622 transitions. Word has length 28 [2021-06-05 21:41:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:03,192 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 40622 transitions. [2021-06-05 21:41:03,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2021-06-05 21:41:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40622 transitions. [2021-06-05 21:41:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:03,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:03,210 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:41:03,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 21:41:03,425 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash 913623149, now seen corresponding path program 5 times [2021-06-05 21:41:03,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:03,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119300642] [2021-06-05 21:41:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:03,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:03,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119300642] [2021-06-05 21:41:03,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119300642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:03,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38449096] [2021-06-05 21:41:03,456 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 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 [2021-06-05 21:41:03,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:41:03,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38449096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:03,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:03,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857761341] [2021-06-05 21:41:03,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:03,560 INFO L87 Difference]: Start difference. First operand 6226 states and 40622 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:03,680 INFO L93 Difference]: Finished difference Result 10638 states and 67096 transitions. [2021-06-05 21:41:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:41:03,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:03,762 INFO L225 Difference]: With dead ends: 10638 [2021-06-05 21:41:03,762 INFO L226 Difference]: Without dead ends: 7656 [2021-06-05 21:41:03,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-06-05 21:41:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2021-06-05 21:41:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 6.388466301079073) internal successors, (36114), 5653 states have internal predecessors, (36114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36114 transitions. [2021-06-05 21:41:03,916 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36114 transitions. Word has length 28 [2021-06-05 21:41:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:03,917 INFO L482 AbstractCegarLoop]: Abstraction has 5654 states and 36114 transitions. [2021-06-05 21:41:03,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36114 transitions. [2021-06-05 21:41:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:03,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:03,931 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:41:04,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 21:41:04,147 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:04,147 INFO L82 PathProgramCache]: Analyzing trace with hash -317378095, now seen corresponding path program 6 times [2021-06-05 21:41:04,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:04,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976735892] [2021-06-05 21:41:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:04,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:04,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976735892] [2021-06-05 21:41:04,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976735892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:04,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792315546] [2021-06-05 21:41:04,170 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 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 [2021-06-05 21:41:04,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:41:04,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:04,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792315546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:04,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:04,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:04,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238098775] [2021-06-05 21:41:04,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:04,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:04,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:04,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:04,282 INFO L87 Difference]: Start difference. First operand 5654 states and 36114 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:04,475 INFO L93 Difference]: Finished difference Result 8816 states and 55756 transitions. [2021-06-05 21:41:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:04,502 INFO L225 Difference]: With dead ends: 8816 [2021-06-05 21:41:04,503 INFO L226 Difference]: Without dead ends: 7190 [2021-06-05 21:41:04,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2021-06-05 21:41:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 5368. [2021-06-05 21:41:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 6.3355692193031485) internal successors, (34003), 5367 states have internal predecessors, (34003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34003 transitions. [2021-06-05 21:41:04,677 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34003 transitions. Word has length 28 [2021-06-05 21:41:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:04,677 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 34003 transitions. [2021-06-05 21:41:04,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34003 transitions. [2021-06-05 21:41:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:04,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:04,692 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:41:04,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:04,909 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash -451391601, now seen corresponding path program 7 times [2021-06-05 21:41:04,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:04,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115093504] [2021-06-05 21:41:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:04,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:04,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115093504] [2021-06-05 21:41:04,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115093504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:04,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449293892] [2021-06-05 21:41:04,946 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 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 [2021-06-05 21:41:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:04,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:04,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449293892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246120492] [2021-06-05 21:41:05,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:05,067 INFO L87 Difference]: Start difference. First operand 5368 states and 34003 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-05 21:41:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:05,229 INFO L93 Difference]: Finished difference Result 7762 states and 48993 transitions. [2021-06-05 21:41:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 28 [2021-06-05 21:41:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:05,251 INFO L225 Difference]: With dead ends: 7762 [2021-06-05 21:41:05,251 INFO L226 Difference]: Without dead ends: 6512 [2021-06-05 21:41:05,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-06-05 21:41:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2021-06-05 21:41:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 6.339956221586125) internal successors, (37653), 5939 states have internal predecessors, (37653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37653 transitions. [2021-06-05 21:41:05,407 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37653 transitions. Word has length 28 [2021-06-05 21:41:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:05,408 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 37653 transitions. [2021-06-05 21:41:05,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-05 21:41:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37653 transitions. [2021-06-05 21:41:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:41:05,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:05,422 INFO L554 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] [2021-06-05 21:41:05,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:05,639 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1791557168, now seen corresponding path program 8 times [2021-06-05 21:41:05,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:05,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711720627] [2021-06-05 21:41:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:05,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:05,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711720627] [2021-06-05 21:41:05,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711720627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:05,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907235401] [2021-06-05 21:41:05,691 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 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 [2021-06-05 21:41:05,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:05,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:41:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:41:05,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907235401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:05,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:05,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 21:41:05,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891197954] [2021-06-05 21:41:05,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:41:05,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:05,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:41:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:41:05,868 INFO L87 Difference]: Start difference. First operand 5940 states and 37653 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-06-05 21:41:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:06,000 INFO L93 Difference]: Finished difference Result 13716 states and 86495 transitions. [2021-06-05 21:41:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:06,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 29 [2021-06-05 21:41:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:06,048 INFO L225 Difference]: With dead ends: 13716 [2021-06-05 21:41:06,049 INFO L226 Difference]: Without dead ends: 12948 [2021-06-05 21:41:06,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:41:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2021-06-05 21:41:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 9586. [2021-06-05 21:41:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9586 states, 9585 states have (on average 6.6200312989045385) internal successors, (63453), 9585 states have internal predecessors, (63453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9586 states to 9586 states and 63453 transitions. [2021-06-05 21:41:06,341 INFO L78 Accepts]: Start accepts. Automaton has 9586 states and 63453 transitions. Word has length 29 [2021-06-05 21:41:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:06,341 INFO L482 AbstractCegarLoop]: Abstraction has 9586 states and 63453 transitions. [2021-06-05 21:41:06,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-06-05 21:41:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 9586 states and 63453 transitions. [2021-06-05 21:41:06,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:41:06,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:06,367 INFO L554 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] [2021-06-05 21:41:06,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 21:41:06,567 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:06,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1011086738, now seen corresponding path program 9 times [2021-06-05 21:41:06,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:06,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920311509] [2021-06-05 21:41:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:41:06,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920311509] [2021-06-05 21:41:06,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920311509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833761324] [2021-06-05 21:41:06,610 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 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 [2021-06-05 21:41:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:41:06,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:06,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833761324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:06,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:06,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 21:41:06,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378735072] [2021-06-05 21:41:06,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:06,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:06,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:06,739 INFO L87 Difference]: Start difference. First operand 9586 states and 63453 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:07,112 INFO L93 Difference]: Finished difference Result 25346 states and 162331 transitions. [2021-06-05 21:41:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:41:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:41:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:07,201 INFO L225 Difference]: With dead ends: 25346 [2021-06-05 21:41:07,201 INFO L226 Difference]: Without dead ends: 23242 [2021-06-05 21:41:07,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:41:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2021-06-05 21:41:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 14272. [2021-06-05 21:41:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 6.922219886483077) internal successors, (98787), 14271 states have internal predecessors, (98787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 98787 transitions. [2021-06-05 21:41:07,713 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 98787 transitions. Word has length 29 [2021-06-05 21:41:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:07,713 INFO L482 AbstractCegarLoop]: Abstraction has 14272 states and 98787 transitions. [2021-06-05 21:41:07,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 98787 transitions. [2021-06-05 21:41:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:41:07,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:07,752 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:07,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 21:41:07,953 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:07,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1639971327, now seen corresponding path program 10 times [2021-06-05 21:41:07,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:07,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777125094] [2021-06-05 21:41:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:07,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:07,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777125094] [2021-06-05 21:41:07,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777125094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:07,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152530219] [2021-06-05 21:41:07,985 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 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 [2021-06-05 21:41:08,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:41:08,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:08,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:08,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:08,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152530219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:08,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:08,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:08,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480743815] [2021-06-05 21:41:08,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:08,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:08,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:08,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:08,108 INFO L87 Difference]: Start difference. First operand 14272 states and 98787 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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) [2021-06-05 21:41:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:08,300 INFO L93 Difference]: Finished difference Result 19626 states and 131324 transitions. [2021-06-05 21:41:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:08,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 30 [2021-06-05 21:41:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:08,364 INFO L225 Difference]: With dead ends: 19626 [2021-06-05 21:41:08,364 INFO L226 Difference]: Without dead ends: 16783 [2021-06-05 21:41:08,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-06-05 21:41:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 13215. [2021-06-05 21:41:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.851672468593915) internal successors, (90538), 13214 states have internal predecessors, (90538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 90538 transitions. [2021-06-05 21:41:08,767 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 90538 transitions. Word has length 30 [2021-06-05 21:41:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:08,767 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 90538 transitions. [2021-06-05 21:41:08,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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) [2021-06-05 21:41:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 90538 transitions. [2021-06-05 21:41:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:41:08,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:08,800 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:09,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:41:09,001 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1256865581, now seen corresponding path program 11 times [2021-06-05 21:41:09,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:09,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731345271] [2021-06-05 21:41:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:09,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:09,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731345271] [2021-06-05 21:41:09,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731345271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:09,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388208949] [2021-06-05 21:41:09,031 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 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 [2021-06-05 21:41:09,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:41:09,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388208949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:09,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:09,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:09,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890126250] [2021-06-05 21:41:09,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:09,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:09,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:09,129 INFO L87 Difference]: Start difference. First operand 13215 states and 90538 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-06-05 21:41:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:09,340 INFO L93 Difference]: Finished difference Result 20352 states and 135504 transitions. [2021-06-05 21:41:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:09,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 30 [2021-06-05 21:41:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:09,398 INFO L225 Difference]: With dead ends: 20352 [2021-06-05 21:41:09,398 INFO L226 Difference]: Without dead ends: 15593 [2021-06-05 21:41:09,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15593 states. [2021-06-05 21:41:09,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15593 to 13215. [2021-06-05 21:41:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.761767822006962) internal successors, (89350), 13214 states have internal predecessors, (89350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 89350 transitions. [2021-06-05 21:41:09,745 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 89350 transitions. Word has length 30 [2021-06-05 21:41:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:09,745 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 89350 transitions. [2021-06-05 21:41:09,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-06-05 21:41:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 89350 transitions. [2021-06-05 21:41:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:41:09,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:09,776 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:09,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:09,977 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1618072385, now seen corresponding path program 12 times [2021-06-05 21:41:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:09,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048301254] [2021-06-05 21:41:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:10,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:10,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048301254] [2021-06-05 21:41:10,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048301254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:10,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949047268] [2021-06-05 21:41:10,001 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 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 [2021-06-05 21:41:10,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:41:10,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:10,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:10,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949047268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:10,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:10,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998487572] [2021-06-05 21:41:10,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:10,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:10,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:10,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:10,115 INFO L87 Difference]: Start difference. First operand 13215 states and 89350 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:10,421 INFO L93 Difference]: Finished difference Result 19162 states and 126426 transitions. [2021-06-05 21:41:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:41:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:41:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:10,477 INFO L225 Difference]: With dead ends: 19162 [2021-06-05 21:41:10,477 INFO L226 Difference]: Without dead ends: 16185 [2021-06-05 21:41:10,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2021-06-05 21:41:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 12027. [2021-06-05 21:41:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12027 states, 12026 states have (on average 6.625644437053052) internal successors, (79680), 12026 states have internal predecessors, (79680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 79680 transitions. [2021-06-05 21:41:10,766 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 79680 transitions. Word has length 30 [2021-06-05 21:41:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:10,766 INFO L482 AbstractCegarLoop]: Abstraction has 12027 states and 79680 transitions. [2021-06-05 21:41:10,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 79680 transitions. [2021-06-05 21:41:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:41:10,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:10,792 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:10,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 21:41:10,996 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:10,996 INFO L82 PathProgramCache]: Analyzing trace with hash 937421221, now seen corresponding path program 13 times [2021-06-05 21:41:10,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:10,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645958872] [2021-06-05 21:41:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:11,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:11,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645958872] [2021-06-05 21:41:11,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645958872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:11,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646915090] [2021-06-05 21:41:11,029 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 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 [2021-06-05 21:41:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646915090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:11,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:11,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:11,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297653918] [2021-06-05 21:41:11,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:11,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:11,120 INFO L87 Difference]: Start difference. First operand 12027 states and 79680 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:11,274 INFO L93 Difference]: Finished difference Result 16783 states and 110645 transitions. [2021-06-05 21:41:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:11,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:41:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:11,322 INFO L225 Difference]: With dead ends: 16783 [2021-06-05 21:41:11,322 INFO L226 Difference]: Without dead ends: 14405 [2021-06-05 21:41:11,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14405 states. [2021-06-05 21:41:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14405 to 11433. [2021-06-05 21:41:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 11432 states have (on average 6.57295311406578) internal successors, (75142), 11432 states have internal predecessors, (75142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 75142 transitions. [2021-06-05 21:41:11,590 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 75142 transitions. Word has length 30 [2021-06-05 21:41:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:11,590 INFO L482 AbstractCegarLoop]: Abstraction has 11433 states and 75142 transitions. [2021-06-05 21:41:11,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 75142 transitions. [2021-06-05 21:41:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:41:11,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:11,616 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:11,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:11,816 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash -73696029, now seen corresponding path program 14 times [2021-06-05 21:41:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:11,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807737289] [2021-06-05 21:41:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:11,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:11,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807737289] [2021-06-05 21:41:11,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807737289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:11,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933008900] [2021-06-05 21:41:11,838 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 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 [2021-06-05 21:41:11,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:11,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933008900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:11,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:11,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812118124] [2021-06-05 21:41:11,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:11,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:11,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:11,933 INFO L87 Difference]: Start difference. First operand 11433 states and 75142 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-05 21:41:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:12,084 INFO L93 Difference]: Finished difference Result 15000 states and 98811 transitions. [2021-06-05 21:41:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:12,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 30 [2021-06-05 21:41:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:12,129 INFO L225 Difference]: With dead ends: 15000 [2021-06-05 21:41:12,129 INFO L226 Difference]: Without dead ends: 13809 [2021-06-05 21:41:12,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13809 states. [2021-06-05 21:41:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13809 to 12621. [2021-06-05 21:41:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12621 states, 12620 states have (on average 6.579239302694137) internal successors, (83030), 12620 states have internal predecessors, (83030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12621 states to 12621 states and 83030 transitions. [2021-06-05 21:41:12,411 INFO L78 Accepts]: Start accepts. Automaton has 12621 states and 83030 transitions. Word has length 30 [2021-06-05 21:41:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:12,411 INFO L482 AbstractCegarLoop]: Abstraction has 12621 states and 83030 transitions. [2021-06-05 21:41:12,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-05 21:41:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 12621 states and 83030 transitions. [2021-06-05 21:41:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:41:12,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:12,439 INFO L554 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] [2021-06-05 21:41:12,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:12,640 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:12,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1100522568, now seen corresponding path program 15 times [2021-06-05 21:41:12,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:12,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554661817] [2021-06-05 21:41:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 21:41:12,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:12,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554661817] [2021-06-05 21:41:12,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554661817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:12,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094389776] [2021-06-05 21:41:12,684 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 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 [2021-06-05 21:41:12,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:41:12,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:12,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:41:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:12,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094389776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:12,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:12,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-06-05 21:41:12,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773722988] [2021-06-05 21:41:12,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:12,831 INFO L87 Difference]: Start difference. First operand 12621 states and 83030 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:13,439 INFO L93 Difference]: Finished difference Result 40048 states and 255837 transitions. [2021-06-05 21:41:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:41:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 21:41:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:13,577 INFO L225 Difference]: With dead ends: 40048 [2021-06-05 21:41:13,577 INFO L226 Difference]: Without dead ends: 37299 [2021-06-05 21:41:13,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:41:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37299 states. [2021-06-05 21:41:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37299 to 23827. [2021-06-05 21:41:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23827 states, 23826 states have (on average 6.888734995383195) internal successors, (164131), 23826 states have internal predecessors, (164131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23827 states to 23827 states and 164131 transitions. [2021-06-05 21:41:14,270 INFO L78 Accepts]: Start accepts. Automaton has 23827 states and 164131 transitions. Word has length 31 [2021-06-05 21:41:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:14,270 INFO L482 AbstractCegarLoop]: Abstraction has 23827 states and 164131 transitions. [2021-06-05 21:41:14,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23827 states and 164131 transitions. [2021-06-05 21:41:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:14,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:14,519 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:14,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 21:41:14,721 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1166394235, now seen corresponding path program 16 times [2021-06-05 21:41:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:14,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650069721] [2021-06-05 21:41:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:14,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650069721] [2021-06-05 21:41:14,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650069721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001167654] [2021-06-05 21:41:14,748 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 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 [2021-06-05 21:41:14,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:41:14,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:14,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001167654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:14,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:14,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:41:14,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096596264] [2021-06-05 21:41:14,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:14,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:14,865 INFO L87 Difference]: Start difference. First operand 23827 states and 164131 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:15,185 INFO L93 Difference]: Finished difference Result 37282 states and 244997 transitions. [2021-06-05 21:41:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:41:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:15,306 INFO L225 Difference]: With dead ends: 37282 [2021-06-05 21:41:15,307 INFO L226 Difference]: Without dead ends: 32432 [2021-06-05 21:41:15,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32432 states. [2021-06-05 21:41:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32432 to 23826. [2021-06-05 21:41:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23826 states, 23825 states have (on average 6.828247639034627) internal successors, (162683), 23825 states have internal predecessors, (162683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23826 states to 23826 states and 162683 transitions. [2021-06-05 21:41:15,957 INFO L78 Accepts]: Start accepts. Automaton has 23826 states and 162683 transitions. Word has length 32 [2021-06-05 21:41:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:15,957 INFO L482 AbstractCegarLoop]: Abstraction has 23826 states and 162683 transitions. [2021-06-05 21:41:15,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 23826 states and 162683 transitions. [2021-06-05 21:41:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:16,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:16,014 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:16,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:16,221 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash 418167869, now seen corresponding path program 17 times [2021-06-05 21:41:16,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:16,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89452767] [2021-06-05 21:41:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:16,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:16,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89452767] [2021-06-05 21:41:16,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89452767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:16,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125789502] [2021-06-05 21:41:16,252 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 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 [2021-06-05 21:41:16,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:41:16,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:16,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125789502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:16,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:16,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:41:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161081930] [2021-06-05 21:41:16,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:16,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:16,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:16,390 INFO L87 Difference]: Start difference. First operand 23826 states and 162683 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:16,980 INFO L93 Difference]: Finished difference Result 41333 states and 268452 transitions. [2021-06-05 21:41:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:41:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:17,099 INFO L225 Difference]: With dead ends: 41333 [2021-06-05 21:41:17,100 INFO L226 Difference]: Without dead ends: 28816 [2021-06-05 21:41:17,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:41:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2021-06-05 21:41:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 21142. [2021-06-05 21:41:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21142 states, 21141 states have (on average 6.765668606026205) internal successors, (143033), 21141 states have internal predecessors, (143033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21142 states to 21142 states and 143033 transitions. [2021-06-05 21:41:17,943 INFO L78 Accepts]: Start accepts. Automaton has 21142 states and 143033 transitions. Word has length 32 [2021-06-05 21:41:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:17,943 INFO L482 AbstractCegarLoop]: Abstraction has 21142 states and 143033 transitions. [2021-06-05 21:41:17,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 21142 states and 143033 transitions. [2021-06-05 21:41:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:17,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:17,994 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:18,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 21:41:18,195 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash 791966179, now seen corresponding path program 18 times [2021-06-05 21:41:18,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:18,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615569180] [2021-06-05 21:41:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 21:41:18,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615569180] [2021-06-05 21:41:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615569180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422343579] [2021-06-05 21:41:18,223 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:18,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:41:18,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:18,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:18,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:18,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422343579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:18,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:18,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:41:18,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907239085] [2021-06-05 21:41:18,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:18,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:18,354 INFO L87 Difference]: Start difference. First operand 21142 states and 143033 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:18,914 INFO L93 Difference]: Finished difference Result 44813 states and 287398 transitions. [2021-06-05 21:41:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:41:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:19,043 INFO L225 Difference]: With dead ends: 44813 [2021-06-05 21:41:19,043 INFO L226 Difference]: Without dead ends: 33157 [2021-06-05 21:41:19,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:41:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33157 states. [2021-06-05 21:41:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33157 to 20660. [2021-06-05 21:41:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20660 states, 20659 states have (on average 6.63855946560821) internal successors, (137146), 20659 states have internal predecessors, (137146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 137146 transitions. [2021-06-05 21:41:20,022 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 137146 transitions. Word has length 32 [2021-06-05 21:41:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:20,022 INFO L482 AbstractCegarLoop]: Abstraction has 20660 states and 137146 transitions. [2021-06-05 21:41:20,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 137146 transitions. [2021-06-05 21:41:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:20,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:20,071 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:20,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:41:20,273 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1084222905, now seen corresponding path program 19 times [2021-06-05 21:41:20,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:20,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070709466] [2021-06-05 21:41:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:20,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:20,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070709466] [2021-06-05 21:41:20,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070709466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:20,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300494388] [2021-06-05 21:41:20,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:20,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:20,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300494388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:20,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:20,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:41:20,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430963986] [2021-06-05 21:41:20,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:20,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:20,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:20,422 INFO L87 Difference]: Start difference. First operand 20660 states and 137146 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:20,957 INFO L93 Difference]: Finished difference Result 40132 states and 256712 transitions. [2021-06-05 21:41:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:41:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:21,076 INFO L225 Difference]: With dead ends: 40132 [2021-06-05 21:41:21,076 INFO L226 Difference]: Without dead ends: 29402 [2021-06-05 21:41:21,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:41:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29402 states. [2021-06-05 21:41:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29402 to 19318. [2021-06-05 21:41:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-06-05 21:41:21,706 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-06-05 21:41:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:21,706 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-06-05 21:41:21,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-06-05 21:41:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:21,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:21,751 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:21,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:21,951 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1022183291, now seen corresponding path program 20 times [2021-06-05 21:41:21,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:21,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503615544] [2021-06-05 21:41:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:21,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503615544] [2021-06-05 21:41:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503615544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511936430] [2021-06-05 21:41:21,984 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:22,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:22,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:22,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511936430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:22,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:22,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:41:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207537469] [2021-06-05 21:41:22,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:41:22,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:41:22,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:41:22,137 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:22,726 INFO L93 Difference]: Finished difference Result 30263 states and 196279 transitions. [2021-06-05 21:41:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:41:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:22,841 INFO L225 Difference]: With dead ends: 30263 [2021-06-05 21:41:22,841 INFO L226 Difference]: Without dead ends: 27994 [2021-06-05 21:41:22,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:41:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27994 states. [2021-06-05 21:41:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27994 to 19318. [2021-06-05 21:41:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-06-05 21:41:23,522 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-06-05 21:41:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:23,523 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-06-05 21:41:23,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-06-05 21:41:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:23,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:23,566 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:23,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:41:23,767 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:23,767 INFO L82 PathProgramCache]: Analyzing trace with hash 13605117, now seen corresponding path program 21 times [2021-06-05 21:41:23,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:23,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846784945] [2021-06-05 21:41:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:23,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846784945] [2021-06-05 21:41:23,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846784945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514553729] [2021-06-05 21:41:23,797 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:23,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:41:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:41:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 21:41:23,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514553729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:23,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:23,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 21:41:23,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898191815] [2021-06-05 21:41:23,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:41:23,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:41:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:41:23,939 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:25,287 INFO L93 Difference]: Finished difference Result 45485 states and 293122 transitions. [2021-06-05 21:41:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:41:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:25,466 INFO L225 Difference]: With dead ends: 45485 [2021-06-05 21:41:25,466 INFO L226 Difference]: Without dead ends: 40798 [2021-06-05 21:41:25,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:41:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40798 states. [2021-06-05 21:41:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40798 to 22218. [2021-06-05 21:41:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.736643111131116) internal successors, (149668), 22217 states have internal predecessors, (149668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149668 transitions. [2021-06-05 21:41:26,352 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149668 transitions. Word has length 32 [2021-06-05 21:41:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:26,353 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149668 transitions. [2021-06-05 21:41:26,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149668 transitions. [2021-06-05 21:41:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:26,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:26,416 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:26,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:26,616 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1536238151, now seen corresponding path program 22 times [2021-06-05 21:41:26,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:26,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922293762] [2021-06-05 21:41:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:26,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922293762] [2021-06-05 21:41:26,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922293762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769697149] [2021-06-05 21:41:26,657 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:26,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:41:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:26,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769697149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:26,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:26,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:41:26,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410365191] [2021-06-05 21:41:26,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:26,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:26,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:26,792 INFO L87 Difference]: Start difference. First operand 22218 states and 149668 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:27,418 INFO L93 Difference]: Finished difference Result 41987 states and 272492 transitions. [2021-06-05 21:41:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:41:27,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:27,539 INFO L225 Difference]: With dead ends: 41987 [2021-06-05 21:41:27,539 INFO L226 Difference]: Without dead ends: 33040 [2021-06-05 21:41:27,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:41:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33040 states. [2021-06-05 21:41:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33040 to 22218. [2021-06-05 21:41:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.7117972723590045) internal successors, (149116), 22217 states have internal predecessors, (149116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149116 transitions. [2021-06-05 21:41:28,294 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149116 transitions. Word has length 32 [2021-06-05 21:41:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:28,294 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149116 transitions. [2021-06-05 21:41:28,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149116 transitions. [2021-06-05 21:41:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:28,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:28,343 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:28,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 21:41:28,544 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash -339950933, now seen corresponding path program 23 times [2021-06-05 21:41:28,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:28,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50769863] [2021-06-05 21:41:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:28,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50769863] [2021-06-05 21:41:28,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50769863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545906945] [2021-06-05 21:41:28,568 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:28,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:41:28,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:28,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:28,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545906945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:28,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:28,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:41:28,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115212252] [2021-06-05 21:41:28,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:28,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:28,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:28,681 INFO L87 Difference]: Start difference. First operand 22218 states and 149116 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:29,286 INFO L93 Difference]: Finished difference Result 37137 states and 242038 transitions. [2021-06-05 21:41:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:41:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:29,417 INFO L225 Difference]: With dead ends: 37137 [2021-06-05 21:41:29,417 INFO L226 Difference]: Without dead ends: 33280 [2021-06-05 21:41:29,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2021-06-05 21:41:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 21666. [2021-06-05 21:41:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21666 states, 21665 states have (on average 6.638495268866836) internal successors, (143823), 21665 states have internal predecessors, (143823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21666 states to 21666 states and 143823 transitions. [2021-06-05 21:41:30,233 INFO L78 Accepts]: Start accepts. Automaton has 21666 states and 143823 transitions. Word has length 32 [2021-06-05 21:41:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:30,233 INFO L482 AbstractCegarLoop]: Abstraction has 21666 states and 143823 transitions. [2021-06-05 21:41:30,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21666 states and 143823 transitions. [2021-06-05 21:41:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:30,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:30,289 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:30,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:41:30,489 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash -277911319, now seen corresponding path program 24 times [2021-06-05 21:41:30,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:30,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310002732] [2021-06-05 21:41:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 21:41:30,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:30,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310002732] [2021-06-05 21:41:30,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310002732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:30,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098887645] [2021-06-05 21:41:30,519 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:30,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:41:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:30,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:30,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098887645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:30,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:30,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:41:30,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251692783] [2021-06-05 21:41:30,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:30,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:30,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:30,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:30,649 INFO L87 Difference]: Start difference. First operand 21666 states and 143823 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:31,519 INFO L93 Difference]: Finished difference Result 55554 states and 358578 transitions. [2021-06-05 21:41:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:41:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:31,661 INFO L225 Difference]: With dead ends: 55554 [2021-06-05 21:41:31,661 INFO L226 Difference]: Without dead ends: 31050 [2021-06-05 21:41:31,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:41:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2021-06-05 21:41:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18354. [2021-06-05 21:41:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18354 states, 18353 states have (on average 6.557238598594235) internal successors, (120345), 18353 states have internal predecessors, (120345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18354 states to 18354 states and 120345 transitions. [2021-06-05 21:41:32,445 INFO L78 Accepts]: Start accepts. Automaton has 18354 states and 120345 transitions. Word has length 32 [2021-06-05 21:41:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:32,445 INFO L482 AbstractCegarLoop]: Abstraction has 18354 states and 120345 transitions. [2021-06-05 21:41:32,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 18354 states and 120345 transitions. [2021-06-05 21:41:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:41:32,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:32,486 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:32,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:32,686 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1583277101, now seen corresponding path program 25 times [2021-06-05 21:41:32,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:32,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684636694] [2021-06-05 21:41:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:32,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684636694] [2021-06-05 21:41:32,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684636694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743907548] [2021-06-05 21:41:32,717 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743907548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:32,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:32,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:41:32,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755937027] [2021-06-05 21:41:32,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:32,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:32,834 INFO L87 Difference]: Start difference. First operand 18354 states and 120345 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:33,121 INFO L93 Difference]: Finished difference Result 24315 states and 158900 transitions. [2021-06-05 21:41:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:41:33,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:41:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:33,193 INFO L225 Difference]: With dead ends: 24315 [2021-06-05 21:41:33,193 INFO L226 Difference]: Without dead ends: 21666 [2021-06-05 21:41:33,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:41:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21666 states. [2021-06-05 21:41:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21666 to 19458. [2021-06-05 21:41:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19458 states, 19457 states have (on average 6.559027599321581) internal successors, (127619), 19457 states have internal predecessors, (127619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19458 states to 19458 states and 127619 transitions. [2021-06-05 21:41:33,846 INFO L78 Accepts]: Start accepts. Automaton has 19458 states and 127619 transitions. Word has length 32 [2021-06-05 21:41:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:33,846 INFO L482 AbstractCegarLoop]: Abstraction has 19458 states and 127619 transitions. [2021-06-05 21:41:33,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 19458 states and 127619 transitions. [2021-06-05 21:41:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:41:33,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:33,890 INFO L554 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] [2021-06-05 21:41:34,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:34,093 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash 548184980, now seen corresponding path program 26 times [2021-06-05 21:41:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:34,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902173173] [2021-06-05 21:41:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:34,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:34,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902173173] [2021-06-05 21:41:34,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902173173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:34,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979690468] [2021-06-05 21:41:34,124 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:34,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:34,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:41:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:41:34,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979690468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:34,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:34,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-06-05 21:41:34,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690694699] [2021-06-05 21:41:34,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:41:34,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:41:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:41:34,293 INFO L87 Difference]: Start difference. First operand 19458 states and 127619 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-06-05 21:41:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:34,878 INFO L93 Difference]: Finished difference Result 43790 states and 285373 transitions. [2021-06-05 21:41:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:41:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 [2021-06-05 21:41:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:35,053 INFO L225 Difference]: With dead ends: 43790 [2021-06-05 21:41:35,053 INFO L226 Difference]: Without dead ends: 42141 [2021-06-05 21:41:35,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:41:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42141 states. [2021-06-05 21:41:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42141 to 31980. [2021-06-05 21:41:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31980 states, 31979 states have (on average 6.798211326182807) internal successors, (217400), 31979 states have internal predecessors, (217400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31980 states to 31980 states and 217400 transitions. [2021-06-05 21:41:36,168 INFO L78 Accepts]: Start accepts. Automaton has 31980 states and 217400 transitions. Word has length 33 [2021-06-05 21:41:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:36,168 INFO L482 AbstractCegarLoop]: Abstraction has 31980 states and 217400 transitions. [2021-06-05 21:41:36,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-06-05 21:41:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 31980 states and 217400 transitions. [2021-06-05 21:41:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:41:36,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:36,248 INFO L554 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] [2021-06-05 21:41:36,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 21:41:36,448 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash 692395924, now seen corresponding path program 27 times [2021-06-05 21:41:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:36,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811756491] [2021-06-05 21:41:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 21:41:36,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:36,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811756491] [2021-06-05 21:41:36,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811756491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:36,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140391876] [2021-06-05 21:41:36,483 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:36,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:41:36,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:41:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 21:41:36,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140391876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:36,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:36,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 21:41:36,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505352219] [2021-06-05 21:41:36,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:36,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:36,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:36,601 INFO L87 Difference]: Start difference. First operand 31980 states and 217400 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:37,940 INFO L93 Difference]: Finished difference Result 78327 states and 512684 transitions. [2021-06-05 21:41:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:41:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:41:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:38,583 INFO L225 Difference]: With dead ends: 78327 [2021-06-05 21:41:38,583 INFO L226 Difference]: Without dead ends: 73049 [2021-06-05 21:41:38,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:41:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73049 states. [2021-06-05 21:41:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73049 to 37920. [2021-06-05 21:41:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37920 states, 37919 states have (on average 6.966454811572035) internal successors, (264161), 37919 states have internal predecessors, (264161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37920 states to 37920 states and 264161 transitions. [2021-06-05 21:41:40,075 INFO L78 Accepts]: Start accepts. Automaton has 37920 states and 264161 transitions. Word has length 33 [2021-06-05 21:41:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:40,075 INFO L482 AbstractCegarLoop]: Abstraction has 37920 states and 264161 transitions. [2021-06-05 21:41:40,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 37920 states and 264161 transitions. [2021-06-05 21:41:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:41:40,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:40,190 INFO L554 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] [2021-06-05 21:41:40,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:40,391 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash -694764650, now seen corresponding path program 28 times [2021-06-05 21:41:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:40,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612705794] [2021-06-05 21:41:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 21:41:40,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:40,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612705794] [2021-06-05 21:41:40,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612705794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:40,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604164480] [2021-06-05 21:41:40,425 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:40,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:41:40,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:40,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604164480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:40,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:40,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:41:40,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195119496] [2021-06-05 21:41:40,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:41:40,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:40,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:41:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:41:40,528 INFO L87 Difference]: Start difference. First operand 37920 states and 264161 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:41,829 INFO L93 Difference]: Finished difference Result 100012 states and 667139 transitions. [2021-06-05 21:41:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:41:41,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:41:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:42,720 INFO L225 Difference]: With dead ends: 100012 [2021-06-05 21:41:42,720 INFO L226 Difference]: Without dead ends: 92787 [2021-06-05 21:41:42,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:41:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92787 states. [2021-06-05 21:41:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92787 to 58925. [2021-06-05 21:41:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58925 states, 58924 states have (on average 7.206706944538728) internal successors, (424648), 58924 states have internal predecessors, (424648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58925 states to 58925 states and 424648 transitions. [2021-06-05 21:41:45,183 INFO L78 Accepts]: Start accepts. Automaton has 58925 states and 424648 transitions. Word has length 33 [2021-06-05 21:41:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:45,183 INFO L482 AbstractCegarLoop]: Abstraction has 58925 states and 424648 transitions. [2021-06-05 21:41:45,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 58925 states and 424648 transitions. [2021-06-05 21:41:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 21:41:45,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:45,396 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:45,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 21:41:45,597 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:45,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1092657503, now seen corresponding path program 29 times [2021-06-05 21:41:45,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:45,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036870832] [2021-06-05 21:41:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:45,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:45,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036870832] [2021-06-05 21:41:45,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036870832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:45,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481666259] [2021-06-05 21:41:45,620 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:45,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:41:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:45,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481666259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:45,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:45,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:45,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402054132] [2021-06-05 21:41:45,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:45,719 INFO L87 Difference]: Start difference. First operand 58925 states and 424648 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-05 21:41:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:47,034 INFO L93 Difference]: Finished difference Result 86764 states and 598397 transitions. [2021-06-05 21:41:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 21:41:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:47,385 INFO L225 Difference]: With dead ends: 86764 [2021-06-05 21:41:47,385 INFO L226 Difference]: Without dead ends: 74248 [2021-06-05 21:41:47,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74248 states. [2021-06-05 21:41:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74248 to 55757. [2021-06-05 21:41:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.122354544802353) internal successors, (397114), 55756 states have internal predecessors, (397114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 397114 transitions. [2021-06-05 21:41:49,777 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 397114 transitions. Word has length 34 [2021-06-05 21:41:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:49,777 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 397114 transitions. [2021-06-05 21:41:49,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-05 21:41:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 397114 transitions. [2021-06-05 21:41:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 21:41:49,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:49,944 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:50,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 21:41:50,144 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash 759094517, now seen corresponding path program 30 times [2021-06-05 21:41:50,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:50,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266286282] [2021-06-05 21:41:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:50,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:50,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266286282] [2021-06-05 21:41:50,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266286282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:50,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843262285] [2021-06-05 21:41:50,168 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:50,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:41:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843262285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:50,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:50,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:50,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955520156] [2021-06-05 21:41:50,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:50,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:50,256 INFO L87 Difference]: Start difference. First operand 55757 states and 397114 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2021-06-05 21:41:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:51,462 INFO L93 Difference]: Finished difference Result 92909 states and 637114 transitions. [2021-06-05 21:41:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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 34 [2021-06-05 21:41:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:51,811 INFO L225 Difference]: With dead ends: 92909 [2021-06-05 21:41:51,812 INFO L226 Difference]: Without dead ends: 68099 [2021-06-05 21:41:51,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68099 states. [2021-06-05 21:41:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68099 to 55757. [2021-06-05 21:41:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.012267738001292) internal successors, (390976), 55756 states have internal predecessors, (390976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 390976 transitions. [2021-06-05 21:41:54,206 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 390976 transitions. Word has length 34 [2021-06-05 21:41:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:54,208 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 390976 transitions. [2021-06-05 21:41:54,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2021-06-05 21:41:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 390976 transitions. [2021-06-05 21:41:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 21:41:54,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:54,385 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:54,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 21:41:54,589 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:54,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1460159095, now seen corresponding path program 31 times [2021-06-05 21:41:54,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:54,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211979592] [2021-06-05 21:41:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:54,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:54,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211979592] [2021-06-05 21:41:54,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211979592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:54,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829339736] [2021-06-05 21:41:54,609 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:54,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:54,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:54,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829339736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:54,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:54,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:54,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896270964] [2021-06-05 21:41:54,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:54,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:54,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:54,696 INFO L87 Difference]: Start difference. First operand 55757 states and 390976 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:55,922 INFO L93 Difference]: Finished difference Result 86696 states and 588891 transitions. [2021-06-05 21:41:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:41:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 21:41:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:56,283 INFO L225 Difference]: With dead ends: 86696 [2021-06-05 21:41:56,283 INFO L226 Difference]: Without dead ends: 71102 [2021-06-05 21:41:56,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71102 states. [2021-06-05 21:41:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71102 to 49619. [2021-06-05 21:41:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49619 states, 49618 states have (on average 6.850961344673304) internal successors, (339931), 49618 states have internal predecessors, (339931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49619 states to 49619 states and 339931 transitions. [2021-06-05 21:41:58,180 INFO L78 Accepts]: Start accepts. Automaton has 49619 states and 339931 transitions. Word has length 34 [2021-06-05 21:41:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:58,180 INFO L482 AbstractCegarLoop]: Abstraction has 49619 states and 339931 transitions. [2021-06-05 21:41:58,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 49619 states and 339931 transitions. [2021-06-05 21:41:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 21:41:58,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:58,321 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:58,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 21:41:58,522 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:41:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash -351716319, now seen corresponding path program 32 times [2021-06-05 21:41:58,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:58,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509229003] [2021-06-05 21:41:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:58,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:58,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509229003] [2021-06-05 21:41:58,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509229003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:58,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919526349] [2021-06-05 21:41:58,541 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:58,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:41:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:41:58,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919526349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:58,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:58,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:41:58,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557540608] [2021-06-05 21:41:58,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:41:58,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:41:58,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:41:58,652 INFO L87 Difference]: Start difference. First operand 49619 states and 339931 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:59,701 INFO L93 Difference]: Finished difference Result 74312 states and 504788 transitions. [2021-06-05 21:41:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:41:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 21:41:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:59,968 INFO L225 Difference]: With dead ends: 74312 [2021-06-05 21:41:59,968 INFO L226 Difference]: Without dead ends: 61961 [2021-06-05 21:41:59,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:42:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61961 states. [2021-06-05 21:42:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61961 to 46550. [2021-06-05 21:42:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46550 states, 46549 states have (on average 6.78732088766676) internal successors, (315943), 46549 states have internal predecessors, (315943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46550 states to 46550 states and 315943 transitions. [2021-06-05 21:42:01,553 INFO L78 Accepts]: Start accepts. Automaton has 46550 states and 315943 transitions. Word has length 34 [2021-06-05 21:42:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:01,553 INFO L482 AbstractCegarLoop]: Abstraction has 46550 states and 315943 transitions. [2021-06-05 21:42:01,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46550 states and 315943 transitions. [2021-06-05 21:42:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 21:42:02,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:02,059 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:42:02,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 21:42:02,273 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash -744743329, now seen corresponding path program 33 times [2021-06-05 21:42:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:02,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147332651] [2021-06-05 21:42:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:42:02,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:02,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147332651] [2021-06-05 21:42:02,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147332651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:02,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947862701] [2021-06-05 21:42:02,292 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:02,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:42:02,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:42:02,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:42:02,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:42:02,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947862701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:02,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:02,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:42:02,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520810614] [2021-06-05 21:42:02,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:42:02,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:02,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:42:02,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:42:02,379 INFO L87 Difference]: Start difference. First operand 46550 states and 315943 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-05 21:42:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:02,927 INFO L93 Difference]: Finished difference Result 65072 states and 441884 transitions. [2021-06-05 21:42:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:42:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 21:42:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:03,165 INFO L225 Difference]: With dead ends: 65072 [2021-06-05 21:42:03,165 INFO L226 Difference]: Without dead ends: 58826 [2021-06-05 21:42:03,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:42:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58826 states. [2021-06-05 21:42:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58826 to 52688. [2021-06-05 21:42:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52688 states, 52687 states have (on average 6.79068840510942) internal successors, (357781), 52687 states have internal predecessors, (357781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52688 states to 52688 states and 357781 transitions. [2021-06-05 21:42:05,332 INFO L78 Accepts]: Start accepts. Automaton has 52688 states and 357781 transitions. Word has length 34 [2021-06-05 21:42:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:05,332 INFO L482 AbstractCegarLoop]: Abstraction has 52688 states and 357781 transitions. [2021-06-05 21:42:05,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-05 21:42:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 52688 states and 357781 transitions. [2021-06-05 21:42:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:42:05,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:05,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 21:42:05,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:42:05,688 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1952484644, now seen corresponding path program 34 times [2021-06-05 21:42:05,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:05,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220460536] [2021-06-05 21:42:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 21:42:05,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220460536] [2021-06-05 21:42:05,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220460536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676819051] [2021-06-05 21:42:05,721 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:05,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:42:05,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:42:05,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:42:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:42:05,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676819051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:05,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:05,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 21:42:05,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601410897] [2021-06-05 21:42:05,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:42:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:42:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:42:05,836 INFO L87 Difference]: Start difference. First operand 52688 states and 357781 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:08,113 INFO L93 Difference]: Finished difference Result 164151 states and 1080949 transitions. [2021-06-05 21:42:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:42:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:42:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:09,370 INFO L225 Difference]: With dead ends: 164151 [2021-06-05 21:42:09,370 INFO L226 Difference]: Without dead ends: 155058 [2021-06-05 21:42:09,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:42:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155058 states. [2021-06-05 21:42:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155058 to 98860. [2021-06-05 21:42:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98860 states, 98859 states have (on average 7.100709090725174) internal successors, (701969), 98859 states have internal predecessors, (701969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98860 states to 98860 states and 701969 transitions. [2021-06-05 21:42:13,217 INFO L78 Accepts]: Start accepts. Automaton has 98860 states and 701969 transitions. Word has length 35 [2021-06-05 21:42:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:13,217 INFO L482 AbstractCegarLoop]: Abstraction has 98860 states and 701969 transitions. [2021-06-05 21:42:13,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 98860 states and 701969 transitions. [2021-06-05 21:42:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 21:42:14,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:14,171 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 21:42:14,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:42:14,385 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1072335793, now seen corresponding path program 35 times [2021-06-05 21:42:14,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:14,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956063356] [2021-06-05 21:42:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:14,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:14,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956063356] [2021-06-05 21:42:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956063356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:14,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569682399] [2021-06-05 21:42:14,414 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:14,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:42:14,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:42:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:42:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:14,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569682399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:14,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:14,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 21:42:14,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950666086] [2021-06-05 21:42:14,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:42:14,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:14,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:42:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:42:14,549 INFO L87 Difference]: Start difference. First operand 98860 states and 701969 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:16,254 INFO L93 Difference]: Finished difference Result 144978 states and 989665 transitions. [2021-06-05 21:42:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:42:16,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 21:42:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:16,885 INFO L225 Difference]: With dead ends: 144978 [2021-06-05 21:42:16,886 INFO L226 Difference]: Without dead ends: 131912 [2021-06-05 21:42:16,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:42:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131912 states. [2021-06-05 21:42:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131912 to 102815. [2021-06-05 21:42:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102815 states, 102814 states have (on average 7.039090007197464) internal successors, (723717), 102814 states have internal predecessors, (723717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102815 states to 102815 states and 723717 transitions. [2021-06-05 21:42:21,196 INFO L78 Accepts]: Start accepts. Automaton has 102815 states and 723717 transitions. Word has length 36 [2021-06-05 21:42:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:21,196 INFO L482 AbstractCegarLoop]: Abstraction has 102815 states and 723717 transitions. [2021-06-05 21:42:21,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 102815 states and 723717 transitions. [2021-06-05 21:42:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 21:42:21,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:21,523 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 21:42:21,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:21,723 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash 776425721, now seen corresponding path program 36 times [2021-06-05 21:42:21,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:21,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860290447] [2021-06-05 21:42:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:21,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860290447] [2021-06-05 21:42:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860290447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284673293] [2021-06-05 21:42:21,765 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:21,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:42:21,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:42:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:42:21,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:21,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284673293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:21,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:21,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:42:21,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503751496] [2021-06-05 21:42:21,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:42:21,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:21,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:42:21,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:42:21,902 INFO L87 Difference]: Start difference. First operand 102815 states and 723717 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:24,266 INFO L93 Difference]: Finished difference Result 163299 states and 1102914 transitions. [2021-06-05 21:42:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:42:24,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 21:42:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:24,876 INFO L225 Difference]: With dead ends: 163299 [2021-06-05 21:42:24,876 INFO L226 Difference]: Without dead ends: 120510 [2021-06-05 21:42:24,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:42:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120510 states. [2021-06-05 21:42:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120510 to 87490. [2021-06-05 21:42:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87490 states, 87489 states have (on average 7.016344911931785) internal successors, (613853), 87489 states have internal predecessors, (613853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87490 states to 87490 states and 613853 transitions. [2021-06-05 21:42:28,197 INFO L78 Accepts]: Start accepts. Automaton has 87490 states and 613853 transitions. Word has length 36 [2021-06-05 21:42:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:28,197 INFO L482 AbstractCegarLoop]: Abstraction has 87490 states and 613853 transitions. [2021-06-05 21:42:28,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 87490 states and 613853 transitions. [2021-06-05 21:42:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 21:42:29,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:29,090 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 21:42:29,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:29,290 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:29,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2001694799, now seen corresponding path program 37 times [2021-06-05 21:42:29,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:29,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098915052] [2021-06-05 21:42:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 21:42:29,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:29,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098915052] [2021-06-05 21:42:29,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098915052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:29,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670292439] [2021-06-05 21:42:29,322 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:29,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:42:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:29,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670292439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:29,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:29,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 21:42:29,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957613228] [2021-06-05 21:42:29,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:42:29,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:42:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:42:29,476 INFO L87 Difference]: Start difference. First operand 87490 states and 613853 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:31,243 INFO L93 Difference]: Finished difference Result 148260 states and 994640 transitions. [2021-06-05 21:42:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:42:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 21:42:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:31,804 INFO L225 Difference]: With dead ends: 148260 [2021-06-05 21:42:31,804 INFO L226 Difference]: Without dead ends: 119736 [2021-06-05 21:42:31,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:42:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119736 states. [2021-06-05 21:42:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119736 to 88381. [2021-06-05 21:42:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.939499886852229) internal successors, (613313), 88380 states have internal predecessors, (613313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 613313 transitions. [2021-06-05 21:42:35,517 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 613313 transitions. Word has length 36 [2021-06-05 21:42:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:35,518 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 613313 transitions. [2021-06-05 21:42:35,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 613313 transitions. [2021-06-05 21:42:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 21:42:35,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:35,944 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 21:42:36,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:36,144 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1133140203, now seen corresponding path program 38 times [2021-06-05 21:42:36,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:36,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8710598] [2021-06-05 21:42:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:36,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:36,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8710598] [2021-06-05 21:42:36,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8710598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:36,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150203933] [2021-06-05 21:42:36,178 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:36,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:42:36,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:42:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:42:36,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:36,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150203933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:36,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:36,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 21:42:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823225892] [2021-06-05 21:42:36,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:42:36,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:36,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:42:36,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:42:36,327 INFO L87 Difference]: Start difference. First operand 88381 states and 613313 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:38,372 INFO L93 Difference]: Finished difference Result 154610 states and 1027932 transitions. [2021-06-05 21:42:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:42:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 21:42:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:38,938 INFO L225 Difference]: With dead ends: 154610 [2021-06-05 21:42:38,938 INFO L226 Difference]: Without dead ends: 121821 [2021-06-05 21:42:38,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:42:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121821 states. [2021-06-05 21:42:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121821 to 88381. [2021-06-05 21:42:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.9149015614392395) internal successors, (611139), 88380 states have internal predecessors, (611139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 611139 transitions. [2021-06-05 21:42:42,733 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 611139 transitions. Word has length 36 [2021-06-05 21:42:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:42,734 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 611139 transitions. [2021-06-05 21:42:42,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 611139 transitions. [2021-06-05 21:42:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 21:42:43,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:43,016 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 21:42:43,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 21:42:43,216 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1642613293, now seen corresponding path program 39 times [2021-06-05 21:42:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:43,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599299166] [2021-06-05 21:42:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 21:42:43,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:43,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599299166] [2021-06-05 21:42:43,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599299166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:43,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748088714] [2021-06-05 21:42:43,254 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:43,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:42:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:42:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:42:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 21:42:43,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748088714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:43,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:43,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 21:42:43,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360489154] [2021-06-05 21:42:43,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:42:43,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:43,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:42:43,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:42:43,382 INFO L87 Difference]: Start difference. First operand 88381 states and 611139 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:46,546 INFO L93 Difference]: Finished difference Result 188739 states and 1249534 transitions. [2021-06-05 21:42:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:42:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 21:42:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:47,390 INFO L225 Difference]: With dead ends: 188739 [2021-06-05 21:42:47,390 INFO L226 Difference]: Without dead ends: 177820 [2021-06-05 21:42:47,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=250, Invalid=2300, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:42:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177820 states. [2021-06-05 21:42:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177820 to 108631. [2021-06-05 21:42:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108631 states, 108630 states have (on average 6.994228113780723) internal successors, (759783), 108630 states have internal predecessors, (759783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108631 states to 108631 states and 759783 transitions. [2021-06-05 21:42:52,161 INFO L78 Accepts]: Start accepts. Automaton has 108631 states and 759783 transitions. Word has length 36 [2021-06-05 21:42:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:52,161 INFO L482 AbstractCegarLoop]: Abstraction has 108631 states and 759783 transitions. [2021-06-05 21:42:52,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 108631 states and 759783 transitions. [2021-06-05 21:42:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:42:53,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:53,464 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:42:53,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:53,680 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:42:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash -674266402, now seen corresponding path program 40 times [2021-06-05 21:42:53,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:53,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412109333] [2021-06-05 21:42:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 21:42:53,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412109333] [2021-06-05 21:42:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412109333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:53,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692361720] [2021-06-05 21:42:53,731 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:53,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:42:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:42:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:42:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:42:54,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692361720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:54,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:54,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 21:42:54,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537794150] [2021-06-05 21:42:54,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:42:54,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:42:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:42:54,017 INFO L87 Difference]: Start difference. First operand 108631 states and 759783 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) 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) [2021-06-05 21:42:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:56,778 INFO L93 Difference]: Finished difference Result 223476 states and 1495121 transitions. [2021-06-05 21:42:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:42:56,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) 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 37 [2021-06-05 21:42:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:58,202 INFO L225 Difference]: With dead ends: 223476 [2021-06-05 21:42:58,202 INFO L226 Difference]: Without dead ends: 177390 [2021-06-05 21:42:58,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:42:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177390 states. [2021-06-05 21:43:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177390 to 106167. [2021-06-05 21:43:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106167 states, 106166 states have (on average 6.964772149275663) internal successors, (739422), 106166 states have internal predecessors, (739422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106167 states to 106167 states and 739422 transitions. [2021-06-05 21:43:02,880 INFO L78 Accepts]: Start accepts. Automaton has 106167 states and 739422 transitions. Word has length 37 [2021-06-05 21:43:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:43:02,880 INFO L482 AbstractCegarLoop]: Abstraction has 106167 states and 739422 transitions. [2021-06-05 21:43:02,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) 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) [2021-06-05 21:43:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 106167 states and 739422 transitions. [2021-06-05 21:43:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:43:03,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:43:03,207 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:43:03,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:03,407 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:43:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:43:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash 481122298, now seen corresponding path program 41 times [2021-06-05 21:43:03,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:43:03,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651263855] [2021-06-05 21:43:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:43:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:03,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:43:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651263855] [2021-06-05 21:43:03,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651263855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452796391] [2021-06-05 21:43:03,436 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:03,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:43:03,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:43:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:43:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:43:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:03,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452796391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:03,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:43:03,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 21:43:03,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062518020] [2021-06-05 21:43:03,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:43:03,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:43:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:43:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:43:03,617 INFO L87 Difference]: Start difference. First operand 106167 states and 739422 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) 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) [2021-06-05 21:43:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:43:06,117 INFO L93 Difference]: Finished difference Result 191961 states and 1284744 transitions. [2021-06-05 21:43:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:43:06,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) 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 37 [2021-06-05 21:43:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:43:06,872 INFO L225 Difference]: With dead ends: 191961 [2021-06-05 21:43:06,873 INFO L226 Difference]: Without dead ends: 159123 [2021-06-05 21:43:06,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:43:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159123 states. [2021-06-05 21:43:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159123 to 108827. [2021-06-05 21:43:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108827 states, 108826 states have (on average 6.872089390403029) internal successors, (747862), 108826 states have internal predecessors, (747862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108827 states to 108827 states and 747862 transitions. [2021-06-05 21:43:11,358 INFO L78 Accepts]: Start accepts. Automaton has 108827 states and 747862 transitions. Word has length 37 [2021-06-05 21:43:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:43:11,358 INFO L482 AbstractCegarLoop]: Abstraction has 108827 states and 747862 transitions. [2021-06-05 21:43:11,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) 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) [2021-06-05 21:43:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 108827 states and 747862 transitions. [2021-06-05 21:43:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:43:11,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:43:11,680 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:43:11,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:43:11,881 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:43:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:43:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1867325692, now seen corresponding path program 42 times [2021-06-05 21:43:11,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:43:11,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656592742] [2021-06-05 21:43:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:43:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 21:43:11,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:43:11,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656592742] [2021-06-05 21:43:11,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656592742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:11,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639461527] [2021-06-05 21:43:11,919 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:11,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:43:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:43:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:43:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:43:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 21:43:12,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639461527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:12,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:43:12,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:43:12,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117247755] [2021-06-05 21:43:12,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:43:12,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:43:12,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:43:12,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:43:12,088 INFO L87 Difference]: Start difference. First operand 108827 states and 747862 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:43:15,263 INFO L93 Difference]: Finished difference Result 190091 states and 1240020 transitions. [2021-06-05 21:43:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 21:43:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 21:43:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:43:16,382 INFO L225 Difference]: With dead ends: 190091 [2021-06-05 21:43:16,382 INFO L226 Difference]: Without dead ends: 137534 [2021-06-05 21:43:16,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 502.4ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 21:43:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137534 states. [2021-06-05 21:43:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137534 to 99038. [2021-06-05 21:43:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-06-05 21:43:20,122 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-06-05 21:43:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:43:20,122 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-06-05 21:43:20,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-06-05 21:43:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:43:20,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:43:20,444 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:43:20,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 21:43:20,645 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:43:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:43:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1878928166, now seen corresponding path program 43 times [2021-06-05 21:43:20,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:43:20,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355222570] [2021-06-05 21:43:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:43:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:20,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:43:20,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355222570] [2021-06-05 21:43:20,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355222570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:20,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746858878] [2021-06-05 21:43:20,685 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:43:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:43:21,537 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 21:43:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:21,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746858878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:21,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:43:21,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:43:21,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738256280] [2021-06-05 21:43:21,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:43:21,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:43:21,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:43:21,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:43:21,577 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2021-06-05 21:43:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:43:23,391 INFO L93 Difference]: Finished difference Result 147129 states and 986771 transitions. [2021-06-05 21:43:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:43:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 37 [2021-06-05 21:43:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:43:24,025 INFO L225 Difference]: With dead ends: 147129 [2021-06-05 21:43:24,026 INFO L226 Difference]: Without dead ends: 140734 [2021-06-05 21:43:24,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:43:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140734 states. [2021-06-05 21:43:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140734 to 99038. [2021-06-05 21:43:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-06-05 21:43:28,063 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-06-05 21:43:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:43:28,063 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-06-05 21:43:28,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2021-06-05 21:43:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-06-05 21:43:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:43:28,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:43:28,378 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:43:28,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:43:28,585 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:43:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:43:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1505483020, now seen corresponding path program 44 times [2021-06-05 21:43:28,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:43:28,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459215590] [2021-06-05 21:43:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:43:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:28,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:43:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459215590] [2021-06-05 21:43:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459215590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676138835] [2021-06-05 21:43:28,625 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:28,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:43:28,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:43:28,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:43:28,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:43:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:28,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676138835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:28,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:43:28,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:43:28,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923363322] [2021-06-05 21:43:28,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:43:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:43:28,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:43:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:43:28,802 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2021-06-05 21:43:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:43:31,916 INFO L93 Difference]: Finished difference Result 210905 states and 1398862 transitions. [2021-06-05 21:43:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:43:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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 37 [2021-06-05 21:43:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:43:33,498 INFO L225 Difference]: With dead ends: 210905 [2021-06-05 21:43:33,498 INFO L226 Difference]: Without dead ends: 177289 [2021-06-05 21:43:33,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:43:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177289 states. [2021-06-05 21:43:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177289 to 87818. [2021-06-05 21:43:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87818 states, 87817 states have (on average 6.753339330653518) internal successors, (593058), 87817 states have internal predecessors, (593058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87818 states to 87818 states and 593058 transitions. [2021-06-05 21:43:38,134 INFO L78 Accepts]: Start accepts. Automaton has 87818 states and 593058 transitions. Word has length 37 [2021-06-05 21:43:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:43:38,135 INFO L482 AbstractCegarLoop]: Abstraction has 87818 states and 593058 transitions. [2021-06-05 21:43:38,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2021-06-05 21:43:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 87818 states and 593058 transitions. [2021-06-05 21:43:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:43:38,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:43:38,424 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:43:38,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:38,624 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:43:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:43:38,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1404559502, now seen corresponding path program 45 times [2021-06-05 21:43:38,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:43:38,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726537472] [2021-06-05 21:43:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:43:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:38,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:43:38,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726537472] [2021-06-05 21:43:38,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726537472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:38,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820658892] [2021-06-05 21:43:38,661 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:38,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:43:38,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:43:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:43:38,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:43:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 21:43:38,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820658892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:38,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:43:38,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:43:38,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314470651] [2021-06-05 21:43:38,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:43:38,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:43:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:43:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:43:38,825 INFO L87 Difference]: Start difference. First operand 87818 states and 593058 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:43:42,411 INFO L93 Difference]: Finished difference Result 192010 states and 1246834 transitions. [2021-06-05 21:43:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 21:43:42,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 21:43:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:43:43,239 INFO L225 Difference]: With dead ends: 192010 [2021-06-05 21:43:43,239 INFO L226 Difference]: Without dead ends: 178847 [2021-06-05 21:43:43,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=263, Invalid=3397, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:43:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178847 states. [2021-06-05 21:43:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178847 to 100736. [2021-06-05 21:43:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.7786667990271505) internal successors, (682849), 100735 states have internal predecessors, (682849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 682849 transitions. [2021-06-05 21:43:47,700 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 682849 transitions. Word has length 37 [2021-06-05 21:43:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:43:47,700 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 682849 transitions. [2021-06-05 21:43:47,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 682849 transitions. [2021-06-05 21:43:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:43:48,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:43:48,013 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:43:48,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:48,214 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:43:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:43:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1180951440, now seen corresponding path program 46 times [2021-06-05 21:43:48,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:43:48,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955885002] [2021-06-05 21:43:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:43:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:48,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:43:48,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955885002] [2021-06-05 21:43:48,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955885002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:48,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438338233] [2021-06-05 21:43:48,245 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:48,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:43:48,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:43:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:43:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:43:48,909 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 21:43:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:48,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438338233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:48,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:43:48,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 21:43:48,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682471731] [2021-06-05 21:43:48,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:43:48,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:43:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:43:48,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:43:48,941 INFO L87 Difference]: Start difference. First operand 100736 states and 682849 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:43:50,848 INFO L93 Difference]: Finished difference Result 180763 states and 1186152 transitions. [2021-06-05 21:43:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:43:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 21:43:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:43:51,515 INFO L225 Difference]: With dead ends: 180763 [2021-06-05 21:43:51,515 INFO L226 Difference]: Without dead ends: 148324 [2021-06-05 21:43:51,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 652.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:43:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148324 states. [2021-06-05 21:43:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148324 to 100736. [2021-06-05 21:43:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.763855660892441) internal successors, (681357), 100735 states have internal predecessors, (681357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 681357 transitions. [2021-06-05 21:43:55,719 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 681357 transitions. Word has length 37 [2021-06-05 21:43:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:43:55,719 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 681357 transitions. [2021-06-05 21:43:55,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:43:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 681357 transitions. [2021-06-05 21:43:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:43:56,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:43:56,026 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:43:56,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:56,226 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:43:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:43:56,226 INFO L82 PathProgramCache]: Analyzing trace with hash -25562740, now seen corresponding path program 47 times [2021-06-05 21:43:56,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:43:56,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93104193] [2021-06-05 21:43:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:43:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:43:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:43:56,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:43:56,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93104193] [2021-06-05 21:43:56,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93104193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:56,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959282968] [2021-06-05 21:43:56,255 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:43:56,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:43:56,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:43:56,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:43:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:43:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 21:43:56,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959282968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:43:56,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:43:56,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:43:56,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479475334] [2021-06-05 21:43:56,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:43:56,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:43:56,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:43:56,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:43:56,391 INFO L87 Difference]: Start difference. First operand 100736 states and 681357 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:00,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:00,988 INFO L93 Difference]: Finished difference Result 257569 states and 1635717 transitions. [2021-06-05 21:44:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 21:44:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 21:44:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:44:02,010 INFO L225 Difference]: With dead ends: 257569 [2021-06-05 21:44:02,011 INFO L226 Difference]: Without dead ends: 207928 [2021-06-05 21:44:02,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 760.1ms TimeCoverageRelationStatistics Valid=525, Invalid=6117, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 21:44:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207928 states. [2021-06-05 21:44:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207928 to 99243. [2021-06-05 21:44:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99243 states, 99242 states have (on average 6.815461195864654) internal successors, (676380), 99242 states have internal predecessors, (676380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99243 states to 99243 states and 676380 transitions. [2021-06-05 21:44:07,432 INFO L78 Accepts]: Start accepts. Automaton has 99243 states and 676380 transitions. Word has length 37 [2021-06-05 21:44:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:44:07,433 INFO L482 AbstractCegarLoop]: Abstraction has 99243 states and 676380 transitions. [2021-06-05 21:44:07,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 99243 states and 676380 transitions. [2021-06-05 21:44:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:44:07,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:44:07,790 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:44:07,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:07,991 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:44:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:44:07,991 INFO L82 PathProgramCache]: Analyzing trace with hash -931167312, now seen corresponding path program 48 times [2021-06-05 21:44:07,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:44:07,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681150504] [2021-06-05 21:44:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:44:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 21:44:08,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:44:08,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681150504] [2021-06-05 21:44:08,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681150504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:08,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316496877] [2021-06-05 21:44:08,021 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:08,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:44:08,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:44:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:44:08,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:44:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 21:44:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316496877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:08,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:44:08,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:44:08,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938675661] [2021-06-05 21:44:08,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:44:08,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:44:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:44:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:44:08,163 INFO L87 Difference]: Start difference. First operand 99243 states and 676380 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:10,087 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-06-05 21:44:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:13,529 INFO L93 Difference]: Finished difference Result 304259 states and 1944342 transitions. [2021-06-05 21:44:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 21:44:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 21:44:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:44:14,576 INFO L225 Difference]: With dead ends: 304259 [2021-06-05 21:44:14,576 INFO L226 Difference]: Without dead ends: 214089 [2021-06-05 21:44:14,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5022 ImplicationChecksByTransitivity, 1551.8ms TimeCoverageRelationStatistics Valid=1026, Invalid=11856, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 21:44:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214089 states. [2021-06-05 21:44:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214089 to 120131. [2021-06-05 21:44:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120131 states, 120130 states have (on average 6.801115458253559) internal successors, (817018), 120130 states have internal predecessors, (817018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120131 states to 120131 states and 817018 transitions. [2021-06-05 21:44:21,083 INFO L78 Accepts]: Start accepts. Automaton has 120131 states and 817018 transitions. Word has length 37 [2021-06-05 21:44:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:44:21,084 INFO L482 AbstractCegarLoop]: Abstraction has 120131 states and 817018 transitions. [2021-06-05 21:44:21,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 120131 states and 817018 transitions. [2021-06-05 21:44:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:44:21,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:44:21,466 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:44:21,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 21:44:21,681 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:44:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:44:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash -944253574, now seen corresponding path program 49 times [2021-06-05 21:44:21,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:44:21,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986190026] [2021-06-05 21:44:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:44:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 21:44:21,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:44:21,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986190026] [2021-06-05 21:44:21,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986190026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:21,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016460039] [2021-06-05 21:44:21,742 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:44:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:44:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:44:22,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016460039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:22,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:44:22,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 21:44:22,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309679034] [2021-06-05 21:44:22,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:44:22,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:44:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:44:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:44:22,538 INFO L87 Difference]: Start difference. First operand 120131 states and 817018 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:27,583 INFO L93 Difference]: Finished difference Result 412845 states and 2712377 transitions. [2021-06-05 21:44:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:44:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 21:44:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:44:28,712 INFO L225 Difference]: With dead ends: 412845 [2021-06-05 21:44:28,713 INFO L226 Difference]: Without dead ends: 208159 [2021-06-05 21:44:28,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:44:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208159 states. [2021-06-05 21:44:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208159 to 81339. [2021-06-05 21:44:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81339 states, 81338 states have (on average 6.60852246182596) internal successors, (537524), 81338 states have internal predecessors, (537524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81339 states to 81339 states and 537524 transitions. [2021-06-05 21:44:33,366 INFO L78 Accepts]: Start accepts. Automaton has 81339 states and 537524 transitions. Word has length 37 [2021-06-05 21:44:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:44:33,366 INFO L482 AbstractCegarLoop]: Abstraction has 81339 states and 537524 transitions. [2021-06-05 21:44:33,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 81339 states and 537524 transitions. [2021-06-05 21:44:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 21:44:33,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:44:33,609 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:44:33,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:33,810 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:44:33,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:44:33,810 INFO L82 PathProgramCache]: Analyzing trace with hash -265285954, now seen corresponding path program 50 times [2021-06-05 21:44:33,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:44:33,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515771470] [2021-06-05 21:44:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:44:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:44:33,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:44:33,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515771470] [2021-06-05 21:44:33,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515771470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:33,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849406402] [2021-06-05 21:44:33,857 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:33,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:44:33,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:44:33,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:44:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:44:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 21:44:34,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849406402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:34,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:44:34,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:44:34,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791300278] [2021-06-05 21:44:34,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:44:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:44:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:44:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:44:34,003 INFO L87 Difference]: Start difference. First operand 81339 states and 537524 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:35,576 INFO L93 Difference]: Finished difference Result 100680 states and 663750 transitions. [2021-06-05 21:44:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:44:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 21:44:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:44:36,432 INFO L225 Difference]: With dead ends: 100680 [2021-06-05 21:44:36,433 INFO L226 Difference]: Without dead ends: 93275 [2021-06-05 21:44:36,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:44:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93275 states. [2021-06-05 21:44:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93275 to 84323. [2021-06-05 21:44:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84323 states, 84322 states have (on average 6.609212305210977) internal successors, (557302), 84322 states have internal predecessors, (557302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84323 states to 84323 states and 557302 transitions. [2021-06-05 21:44:39,309 INFO L78 Accepts]: Start accepts. Automaton has 84323 states and 557302 transitions. Word has length 37 [2021-06-05 21:44:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:44:39,309 INFO L482 AbstractCegarLoop]: Abstraction has 84323 states and 557302 transitions. [2021-06-05 21:44:39,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 84323 states and 557302 transitions. [2021-06-05 21:44:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:44:39,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:44:39,677 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:44:39,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 21:44:39,879 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:44:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:44:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash 941176573, now seen corresponding path program 51 times [2021-06-05 21:44:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:44:39,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394551190] [2021-06-05 21:44:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:44:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-05 21:44:39,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:44:39,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394551190] [2021-06-05 21:44:39,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394551190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:39,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643217181] [2021-06-05 21:44:39,900 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:39,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:44:39,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:44:39,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:44:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:44:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:44:40,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643217181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:40,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:44:40,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:44:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182246751] [2021-06-05 21:44:40,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:44:40,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:44:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:44:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:44:40,047 INFO L87 Difference]: Start difference. First operand 84323 states and 557302 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:41,702 INFO L93 Difference]: Finished difference Result 138523 states and 880908 transitions. [2021-06-05 21:44:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:44:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:44:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:44:42,263 INFO L225 Difference]: With dead ends: 138523 [2021-06-05 21:44:42,264 INFO L226 Difference]: Without dead ends: 121480 [2021-06-05 21:44:42,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:44:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121480 states. [2021-06-05 21:44:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121480 to 82775. [2021-06-05 21:44:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82775 states, 82774 states have (on average 6.541510619276584) internal successors, (541467), 82774 states have internal predecessors, (541467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82775 states to 82775 states and 541467 transitions. [2021-06-05 21:44:45,312 INFO L78 Accepts]: Start accepts. Automaton has 82775 states and 541467 transitions. Word has length 38 [2021-06-05 21:44:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:44:45,312 INFO L482 AbstractCegarLoop]: Abstraction has 82775 states and 541467 transitions. [2021-06-05 21:44:45,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 82775 states and 541467 transitions. [2021-06-05 21:44:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:44:46,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:44:46,159 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:44:46,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 21:44:46,365 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:44:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:44:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash -329563039, now seen corresponding path program 52 times [2021-06-05 21:44:46,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:44:46,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927886006] [2021-06-05 21:44:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:44:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:44:46,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:44:46,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927886006] [2021-06-05 21:44:46,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927886006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:46,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881967408] [2021-06-05 21:44:46,396 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:46,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:44:46,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:44:46,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:44:46,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:44:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:44:46,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881967408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:46,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:44:46,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:44:46,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912673401] [2021-06-05 21:44:46,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:44:46,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:44:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:44:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:44:46,525 INFO L87 Difference]: Start difference. First operand 82775 states and 541467 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:48,127 INFO L93 Difference]: Finished difference Result 127682 states and 811850 transitions. [2021-06-05 21:44:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:44:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:44:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:44:48,634 INFO L225 Difference]: With dead ends: 127682 [2021-06-05 21:44:48,634 INFO L226 Difference]: Without dead ends: 107548 [2021-06-05 21:44:48,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:44:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107548 states. [2021-06-05 21:44:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107548 to 81227. [2021-06-05 21:44:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-05 21:44:51,625 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-05 21:44:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:44:51,625 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-05 21:44:51,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-05 21:44:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:44:51,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:44:51,859 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:44:52,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:52,060 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:44:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:44:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1350631393, now seen corresponding path program 53 times [2021-06-05 21:44:52,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:44:52,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455787272] [2021-06-05 21:44:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:44:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:44:52,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:44:52,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455787272] [2021-06-05 21:44:52,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455787272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:52,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794356931] [2021-06-05 21:44:52,085 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:52,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:44:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:44:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:44:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:44:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:44:52,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794356931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:52,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:44:52,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:44:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86079830] [2021-06-05 21:44:52,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:44:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:44:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:44:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:44:52,224 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:53,981 INFO L93 Difference]: Finished difference Result 112190 states and 716949 transitions. [2021-06-05 21:44:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:44:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:44:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:44:54,796 INFO L225 Difference]: With dead ends: 112190 [2021-06-05 21:44:54,796 INFO L226 Difference]: Without dead ends: 109091 [2021-06-05 21:44:54,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:44:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109091 states. [2021-06-05 21:44:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109091 to 81227. [2021-06-05 21:44:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-05 21:44:57,883 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-05 21:44:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:44:57,883 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-05 21:44:57,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-05 21:44:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:44:58,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:44:58,117 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:44:58,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 21:44:58,317 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:44:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:44:58,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1112457229, now seen corresponding path program 54 times [2021-06-05 21:44:58,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:44:58,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895368923] [2021-06-05 21:44:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:44:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:44:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:44:58,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:44:58,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895368923] [2021-06-05 21:44:58,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895368923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:58,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423285679] [2021-06-05 21:44:58,346 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:44:58,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:44:58,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:44:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:44:58,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:44:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:44:58,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423285679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:44:58,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:44:58,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:44:58,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392476884] [2021-06-05 21:44:58,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:44:58,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:44:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:44:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:44:58,469 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:44:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:44:59,927 INFO L93 Difference]: Finished difference Result 119937 states and 766726 transitions. [2021-06-05 21:44:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:44:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:44:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:45:00,875 INFO L225 Difference]: With dead ends: 119937 [2021-06-05 21:45:00,875 INFO L226 Difference]: Without dead ends: 116839 [2021-06-05 21:45:00,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:45:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116839 states. [2021-06-05 21:45:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116839 to 81227. [2021-06-05 21:45:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-05 21:45:04,109 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-05 21:45:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:45:04,109 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-05 21:45:04,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-05 21:45:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:45:04,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:45:04,375 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:45:04,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:04,577 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:45:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:45:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -881687477, now seen corresponding path program 55 times [2021-06-05 21:45:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:45:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785153633] [2021-06-05 21:45:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:45:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:04,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:45:04,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785153633] [2021-06-05 21:45:04,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785153633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:04,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351963128] [2021-06-05 21:45:04,603 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:04,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:45:04,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:45:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:04,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351963128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:04,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:45:04,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:45:04,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085159294] [2021-06-05 21:45:04,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:45:04,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:45:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:45:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:45:04,709 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:45:06,260 INFO L93 Difference]: Finished difference Result 113755 states and 717330 transitions. [2021-06-05 21:45:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:45:06,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:45:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:45:06,770 INFO L225 Difference]: With dead ends: 113755 [2021-06-05 21:45:06,770 INFO L226 Difference]: Without dead ends: 102909 [2021-06-05 21:45:06,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:45:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102909 states. [2021-06-05 21:45:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102909 to 81227. [2021-06-05 21:45:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.452170487282397) internal successors, (524084), 81226 states have internal predecessors, (524084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 524084 transitions. [2021-06-05 21:45:09,703 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 524084 transitions. Word has length 38 [2021-06-05 21:45:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:45:09,703 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 524084 transitions. [2021-06-05 21:45:09,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 524084 transitions. [2021-06-05 21:45:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:45:09,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:45:09,945 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:45:10,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 21:45:10,145 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:45:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:45:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2142540207, now seen corresponding path program 56 times [2021-06-05 21:45:10,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:45:10,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257047632] [2021-06-05 21:45:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:45:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:10,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:45:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257047632] [2021-06-05 21:45:10,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257047632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755868740] [2021-06-05 21:45:10,168 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:10,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:45:10,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:45:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:45:10,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:45:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:10,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755868740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:10,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:45:10,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:45:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820730590] [2021-06-05 21:45:10,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:45:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:45:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:45:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:45:10,291 INFO L87 Difference]: Start difference. First operand 81227 states and 524084 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:45:11,592 INFO L93 Difference]: Finished difference Result 107558 states and 678750 transitions. [2021-06-05 21:45:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:45:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:45:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:45:12,056 INFO L225 Difference]: With dead ends: 107558 [2021-06-05 21:45:12,056 INFO L226 Difference]: Without dead ends: 99816 [2021-06-05 21:45:12,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:45:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99816 states. [2021-06-05 21:45:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99816 to 79679. [2021-06-05 21:45:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79679 states, 79678 states have (on average 6.398215316649514) internal successors, (509797), 79678 states have internal predecessors, (509797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79679 states to 79679 states and 509797 transitions. [2021-06-05 21:45:14,846 INFO L78 Accepts]: Start accepts. Automaton has 79679 states and 509797 transitions. Word has length 38 [2021-06-05 21:45:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:45:14,846 INFO L482 AbstractCegarLoop]: Abstraction has 79679 states and 509797 transitions. [2021-06-05 21:45:14,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 79679 states and 509797 transitions. [2021-06-05 21:45:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:45:15,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:45:15,604 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:45:15,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:15,821 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:45:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:45:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1121471853, now seen corresponding path program 57 times [2021-06-05 21:45:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:45:15,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574054975] [2021-06-05 21:45:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:45:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-05 21:45:15,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:45:15,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574054975] [2021-06-05 21:45:15,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574054975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:15,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131293150] [2021-06-05 21:45:15,845 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:15,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:45:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:45:15,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:45:15,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:45:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:15,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131293150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:15,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:45:15,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:45:15,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662115245] [2021-06-05 21:45:15,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:45:15,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:45:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:45:15,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:45:15,965 INFO L87 Difference]: Start difference. First operand 79679 states and 509797 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:45:17,794 INFO L93 Difference]: Finished difference Result 140075 states and 878174 transitions. [2021-06-05 21:45:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:45:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:45:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:45:18,307 INFO L225 Difference]: With dead ends: 140075 [2021-06-05 21:45:18,307 INFO L226 Difference]: Without dead ends: 105995 [2021-06-05 21:45:18,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:45:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105995 states. [2021-06-05 21:45:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105995 to 70391. [2021-06-05 21:45:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70391 states, 70390 states have (on average 6.35452479045319) internal successors, (447295), 70390 states have internal predecessors, (447295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70391 states to 70391 states and 447295 transitions. [2021-06-05 21:45:21,148 INFO L78 Accepts]: Start accepts. Automaton has 70391 states and 447295 transitions. Word has length 38 [2021-06-05 21:45:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:45:21,148 INFO L482 AbstractCegarLoop]: Abstraction has 70391 states and 447295 transitions. [2021-06-05 21:45:21,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 70391 states and 447295 transitions. [2021-06-05 21:45:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:45:21,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:45:21,338 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:45:21,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 21:45:21,539 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:45:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:45:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash 554192305, now seen corresponding path program 58 times [2021-06-05 21:45:21,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:45:21,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757312100] [2021-06-05 21:45:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:45:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:21,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:45:21,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757312100] [2021-06-05 21:45:21,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757312100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:21,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26292807] [2021-06-05 21:45:21,566 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:21,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:45:21,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:45:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:45:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:45:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26292807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:21,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:45:21,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:45:21,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78840586] [2021-06-05 21:45:21,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:45:21,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:45:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:45:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:45:21,694 INFO L87 Difference]: Start difference. First operand 70391 states and 447295 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:45:22,818 INFO L93 Difference]: Finished difference Result 82778 states and 524444 transitions. [2021-06-05 21:45:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:45:22,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:45:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:45:23,171 INFO L225 Difference]: With dead ends: 82778 [2021-06-05 21:45:23,172 INFO L226 Difference]: Without dead ends: 79679 [2021-06-05 21:45:23,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:45:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79679 states. [2021-06-05 21:45:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79679 to 73487. [2021-06-05 21:45:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73487 states, 73486 states have (on average 6.349250197316496) internal successors, (466581), 73486 states have internal predecessors, (466581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73487 states to 73487 states and 466581 transitions. [2021-06-05 21:45:25,794 INFO L78 Accepts]: Start accepts. Automaton has 73487 states and 466581 transitions. Word has length 38 [2021-06-05 21:45:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:45:25,794 INFO L482 AbstractCegarLoop]: Abstraction has 73487 states and 466581 transitions. [2021-06-05 21:45:25,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 73487 states and 466581 transitions. [2021-06-05 21:45:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:45:26,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:45:26,005 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-05 21:45:26,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:26,205 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:45:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:45:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash -41639662, now seen corresponding path program 59 times [2021-06-05 21:45:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:45:26,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335001582] [2021-06-05 21:45:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:45:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:45:26,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:45:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335001582] [2021-06-05 21:45:26,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335001582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073058393] [2021-06-05 21:45:26,244 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:26,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:45:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:45:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:45:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:45:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:45:26,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073058393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:26,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:45:26,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-06-05 21:45:26,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971363114] [2021-06-05 21:45:26,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:45:26,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:45:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:45:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:45:26,444 INFO L87 Difference]: Start difference. First operand 73487 states and 466581 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:45:28,095 INFO L93 Difference]: Finished difference Result 155912 states and 983338 transitions. [2021-06-05 21:45:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:45:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:45:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:45:29,245 INFO L225 Difference]: With dead ends: 155912 [2021-06-05 21:45:29,245 INFO L226 Difference]: Without dead ends: 151952 [2021-06-05 21:45:29,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:45:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151952 states. [2021-06-05 21:45:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151952 to 119841. [2021-06-05 21:45:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119841 states, 119840 states have (on average 6.5424148865153535) internal successors, (784043), 119840 states have internal predecessors, (784043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119841 states to 119841 states and 784043 transitions. [2021-06-05 21:45:33,834 INFO L78 Accepts]: Start accepts. Automaton has 119841 states and 784043 transitions. Word has length 39 [2021-06-05 21:45:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:45:33,835 INFO L482 AbstractCegarLoop]: Abstraction has 119841 states and 784043 transitions. [2021-06-05 21:45:33,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 119841 states and 784043 transitions. [2021-06-05 21:45:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:45:34,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:45:34,221 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-05 21:45:34,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 21:45:34,422 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:45:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:45:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2062562636, now seen corresponding path program 60 times [2021-06-05 21:45:34,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:45:34,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529620538] [2021-06-05 21:45:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:45:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 21:45:34,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:45:34,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529620538] [2021-06-05 21:45:34,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529620538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:34,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832435779] [2021-06-05 21:45:34,459 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:34,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:45:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:45:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:45:34,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:45:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:45:34,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832435779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:34,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:45:34,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:45:34,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500103763] [2021-06-05 21:45:34,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:45:34,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:45:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:45:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:45:34,635 INFO L87 Difference]: Start difference. First operand 119841 states and 784043 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2021-06-05 21:45:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:45:40,348 INFO L93 Difference]: Finished difference Result 363219 states and 2317845 transitions. [2021-06-05 21:45:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:45:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 39 [2021-06-05 21:45:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:45:42,132 INFO L225 Difference]: With dead ends: 363219 [2021-06-05 21:45:42,132 INFO L226 Difference]: Without dead ends: 351491 [2021-06-05 21:45:42,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:45:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351491 states. [2021-06-05 21:45:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351491 to 205350. [2021-06-05 21:45:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205350 states, 205349 states have (on average 6.88260960608525) internal successors, (1413337), 205349 states have internal predecessors, (1413337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:45:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205350 states to 205350 states and 1413337 transitions. [2021-06-05 21:45:53,054 INFO L78 Accepts]: Start accepts. Automaton has 205350 states and 1413337 transitions. Word has length 39 [2021-06-05 21:45:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:45:53,055 INFO L482 AbstractCegarLoop]: Abstraction has 205350 states and 1413337 transitions. [2021-06-05 21:45:53,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2021-06-05 21:45:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 205350 states and 1413337 transitions. [2021-06-05 21:45:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:45:53,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:45:53,791 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-05 21:45:53,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:53,993 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:45:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:45:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash -828443812, now seen corresponding path program 61 times [2021-06-05 21:45:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:45:53,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131703650] [2021-06-05 21:45:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:45:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 21:45:54,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:45:54,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131703650] [2021-06-05 21:45:54,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131703650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:54,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604627228] [2021-06-05 21:45:54,037 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:45:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:45:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:45:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:45:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-06-05 21:45:54,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604627228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:45:54,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:45:54,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:45:54,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326443087] [2021-06-05 21:45:54,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:45:54,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:45:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:45:54,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:45:54,653 INFO L87 Difference]: Start difference. First operand 205350 states and 1413337 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:46:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:46:01,109 INFO L93 Difference]: Finished difference Result 505241 states and 3345930 transitions. [2021-06-05 21:46:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:46:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:46:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:46:04,521 INFO L225 Difference]: With dead ends: 505241 [2021-06-05 21:46:04,521 INFO L226 Difference]: Without dead ends: 471693 [2021-06-05 21:46:04,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:46:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471693 states. [2021-06-05 21:46:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471693 to 273193. [2021-06-05 21:46:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273193 states, 273192 states have (on average 7.154719025447305) internal successors, (1954612), 273192 states have internal predecessors, (1954612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:46:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273193 states to 273193 states and 1954612 transitions. [2021-06-05 21:46:18,669 INFO L78 Accepts]: Start accepts. Automaton has 273193 states and 1954612 transitions. Word has length 39 [2021-06-05 21:46:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:46:18,669 INFO L482 AbstractCegarLoop]: Abstraction has 273193 states and 1954612 transitions. [2021-06-05 21:46:18,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:46:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 273193 states and 1954612 transitions. [2021-06-05 21:46:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:46:20,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:46:20,206 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-05 21:46:20,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 21:46:20,419 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:46:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:46:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash -410626040, now seen corresponding path program 62 times [2021-06-05 21:46:20,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:46:20,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226544246] [2021-06-05 21:46:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:46:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:46:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 21:46:20,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:46:20,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226544246] [2021-06-05 21:46:20,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226544246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:46:20,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416751469] [2021-06-05 21:46:20,456 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:46:20,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:46:20,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:46:20,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:46:20,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:46:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:46:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416751469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:46:20,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:46:20,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:46:20,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418339585] [2021-06-05 21:46:20,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:46:20,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:46:20,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:46:20,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:46:20,659 INFO L87 Difference]: Start difference. First operand 273193 states and 1954612 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2021-06-05 21:46:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:46:28,837 INFO L93 Difference]: Finished difference Result 514006 states and 3547889 transitions. [2021-06-05 21:46:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:46:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 39 [2021-06-05 21:46:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:46:32,139 INFO L225 Difference]: With dead ends: 514006 [2021-06-05 21:46:32,139 INFO L226 Difference]: Without dead ends: 493775 [2021-06-05 21:46:32,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:46:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493775 states. [2021-06-05 21:46:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493775 to 333832. [2021-06-05 21:46:44,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333832 states, 333831 states have (on average 7.313104534929351) internal successors, (2441341), 333831 states have internal predecessors, (2441341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:46:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333832 states to 333832 states and 2441341 transitions. [2021-06-05 21:46:48,477 INFO L78 Accepts]: Start accepts. Automaton has 333832 states and 2441341 transitions. Word has length 39 [2021-06-05 21:46:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:46:48,477 INFO L482 AbstractCegarLoop]: Abstraction has 333832 states and 2441341 transitions. [2021-06-05 21:46:48,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2021-06-05 21:46:48,477 INFO L276 IsEmpty]: Start isEmpty. Operand 333832 states and 2441341 transitions. [2021-06-05 21:46:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:46:50,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:46:50,321 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-05 21:46:50,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 21:46:50,531 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:46:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:46:50,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1520847550, now seen corresponding path program 63 times [2021-06-05 21:46:50,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:46:50,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534922547] [2021-06-05 21:46:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:46:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:46:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 21:46:50,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:46:50,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534922547] [2021-06-05 21:46:50,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534922547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:46:50,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716134730] [2021-06-05 21:46:50,566 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:46:50,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:46:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:46:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:46:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:46:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 21:46:50,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716134730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:46:50,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:46:50,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:46:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27875770] [2021-06-05 21:46:50,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:46:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:46:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:46:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:46:50,748 INFO L87 Difference]: Start difference. First operand 333832 states and 2441341 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2021-06-05 21:47:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:00,731 INFO L93 Difference]: Finished difference Result 673375 states and 4722113 transitions. [2021-06-05 21:47:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:47:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 39 [2021-06-05 21:47:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:07,958 INFO L225 Difference]: With dead ends: 673375 [2021-06-05 21:47:07,958 INFO L226 Difference]: Without dead ends: 650182 [2021-06-05 21:47:07,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:47:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650182 states. [2021-06-05 21:47:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650182 to 443520. [2021-06-05 21:47:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443520 states, 443519 states have (on average 7.412081556821692) internal successors, (3287399), 443519 states have internal predecessors, (3287399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443520 states to 443520 states and 3287399 transitions. [2021-06-05 21:47:31,704 INFO L78 Accepts]: Start accepts. Automaton has 443520 states and 3287399 transitions. Word has length 39 [2021-06-05 21:47:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:31,705 INFO L482 AbstractCegarLoop]: Abstraction has 443520 states and 3287399 transitions. [2021-06-05 21:47:31,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2021-06-05 21:47:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 443520 states and 3287399 transitions. [2021-06-05 21:47:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 21:47:35,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:35,442 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 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] [2021-06-05 21:47:35,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 21:47:35,659 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 21:47:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1403202507, now seen corresponding path program 64 times [2021-06-05 21:47:35,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:35,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501498601] [2021-06-05 21:47:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:47:35,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501498601] [2021-06-05 21:47:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501498601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:47:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251141914] [2021-06-05 21:47:35,734 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:47:35,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:47:35,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:47:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:47:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:47:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:47:35,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251141914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:47:35,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:47:35,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2021-06-05 21:47:35,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197167944] [2021-06-05 21:47:35,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:47:35,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:47:35,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:47:35,972 INFO L87 Difference]: Start difference. First operand 443520 states and 3287399 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) 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) [2021-06-05 21:47:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:45,864 INFO L93 Difference]: Finished difference Result 620784 states and 4448544 transitions. [2021-06-05 21:47:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:47:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) 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 40 [2021-06-05 21:47:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted.