/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:02:57,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:02:57,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:02:57,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 19:02:57,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 19:02:57,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 19:02:57,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 19:02:57,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 19:02:57,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 19:02:57,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 19:02:57,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 19:02:57,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 19:02:57,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 19:02:57,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 19:02:57,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 19:02:57,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 19:02:57,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 19:02:57,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 19:02:57,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 19:02:57,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 19:02:57,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 19:02:57,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 19:02:57,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 19:02:57,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 19:02:57,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 19:02:57,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-12 19:02:57,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-12 19:02:57,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-12 19:02:57,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-12 19:02:57,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-12 19:02:57,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-12 19:02:57,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-12 19:02:57,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-12 19:02:57,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 19:02:57,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 19:02:57,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 19:02:57,522 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 [2021-08-12 19:02:57,543 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:02:57,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:02:57,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:02:57,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:02:57,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:02:57,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:02:57,545 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:02:57,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:02:57,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:02:57,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:02:57,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:02:57,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:02:57,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:02:57,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:02:57,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:02:57,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:02:57,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:02:57,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:02:57,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:02:57,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:02:57,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:02:57,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:02:57,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:02:57,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:02:57,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:02:57,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:02:57,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:02:57,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:02:57,548 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:02:57,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:02:57,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:02:57,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:02:57,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:02:57,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:02:57,838 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:02:57,840 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:02:57,841 INFO L432 ainManager$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 [2021-08-12 19:02:57,841 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2021-08-12 19:02:57,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:02:57,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:02:57,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:02:57,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:02:57,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:02:57,911 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 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,918 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 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:02:57,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:02:57,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:02:57,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:02:57,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/1) ... [2021-08-12 19:02:57,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:02:57,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:02:57,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:02:57,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:02:57,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (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 [2021-08-12 19:02:58,023 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:02:58,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:02:58,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:02:58,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:02:58,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:02:58,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:02:58,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:02:58,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:02:58,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:02:58,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:02:58,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:02:58,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:02:58,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-12 19:02:58,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-12 19:02:58,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-12 19:02:58,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-12 19:02:58,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-12 19:02:58,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-12 19:02:58,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-12 19:02:58,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-12 19:02:58,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-12 19:02:58,026 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:02:58,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:02:58,160 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-12 19:02:58,160 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-12 19:02:58,160 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-12 19:02:58,161 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-12 19:02:58,161 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-12 19:02:58,161 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-08-12 19:02:58,161 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-08-12 19:02:58,162 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:02:58 BoogieIcfgContainer [2021-08-12 19:02:58,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:02:58,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:02:58,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:02:58,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:02:58,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:02:57" (1/2) ... [2021-08-12 19:02:58,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3d18f9 and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:02:58, skipping insertion in model container [2021-08-12 19:02:58,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:02:58" (2/2) ... [2021-08-12 19:02:58,167 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2021-08-12 19:02:58,171 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:02:58,171 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:02:58,171 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:02:58,230 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-08-12 19:02:58,249 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-12 19:02:58,266 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:02:58,266 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:02:58,266 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:02:58,266 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:02:58,267 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:02:58,267 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:02:58,267 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:02:58,267 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:02:58,273 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2021-08-12 19:02:58,326 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) [2021-08-12 19:02:58,330 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) [2021-08-12 19:02:58,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:02:58,343 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:58,344 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:58,344 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]=== [2021-08-12 19:02:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash 336800480, now seen corresponding path program 1 times [2021-08-12 19:02:58,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:58,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160082222] [2021-08-12 19:02:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:58,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:58,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160082222] [2021-08-12 19:02:58,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160082222] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:02:58,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:02:58,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:02:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495028862] [2021-08-12 19:02:58,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:02:58,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:02:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:02:58,482 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) [2021-08-12 19:02:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:58,531 INFO L93 Difference]: Finished difference Result 386 states and 2059 transitions. [2021-08-12 19:02:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:02:58,532 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 [2021-08-12 19:02:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:58,543 INFO L225 Difference]: With dead ends: 386 [2021-08-12 19:02:58,544 INFO L226 Difference]: Without dead ends: 304 [2021-08-12 19:02:58,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:02:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-12 19:02:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-08-12 19:02:58,592 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) [2021-08-12 19:02:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1654 transitions. [2021-08-12 19:02:58,600 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1654 transitions. Word has length 21 [2021-08-12 19:02:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:58,601 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 1654 transitions. [2021-08-12 19:02:58,601 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) [2021-08-12 19:02:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1654 transitions. [2021-08-12 19:02:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:02:58,605 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:58,605 INFO L550 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] [2021-08-12 19:02:58,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:02:58,605 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]=== [2021-08-12 19:02:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1957873019, now seen corresponding path program 1 times [2021-08-12 19:02:58,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:58,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666936282] [2021-08-12 19:02:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:58,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:58,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666936282] [2021-08-12 19:02:58,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666936282] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:02:58,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:02:58,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:02:58,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131766994] [2021-08-12 19:02:58,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:02:58,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:02:58,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:02:58,666 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) [2021-08-12 19:02:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:58,746 INFO L93 Difference]: Finished difference Result 553 states and 3081 transitions. [2021-08-12 19:02:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:02:58,747 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 [2021-08-12 19:02:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:58,752 INFO L225 Difference]: With dead ends: 553 [2021-08-12 19:02:58,752 INFO L226 Difference]: Without dead ends: 502 [2021-08-12 19:02:58,753 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:02:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-12 19:02:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2021-08-12 19:02:58,793 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) [2021-08-12 19:02:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 2805 transitions. [2021-08-12 19:02:58,800 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 2805 transitions. Word has length 22 [2021-08-12 19:02:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:58,801 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 2805 transitions. [2021-08-12 19:02:58,801 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) [2021-08-12 19:02:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 2805 transitions. [2021-08-12 19:02:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:02:58,810 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:58,810 INFO L550 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] [2021-08-12 19:02:58,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:02:58,810 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]=== [2021-08-12 19:02:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1560108314, now seen corresponding path program 1 times [2021-08-12 19:02:58,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:58,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257530273] [2021-08-12 19:02:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:58,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:58,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257530273] [2021-08-12 19:02:58,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257530273] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:02:58,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:02:58,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:02:58,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109679658] [2021-08-12 19:02:58,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:02:58,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:02:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:02:58,873 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) [2021-08-12 19:02:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:58,921 INFO L93 Difference]: Finished difference Result 991 states and 5579 transitions. [2021-08-12 19:02:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:02:58,921 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 [2021-08-12 19:02:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:58,928 INFO L225 Difference]: With dead ends: 991 [2021-08-12 19:02:58,928 INFO L226 Difference]: Without dead ends: 859 [2021-08-12 19:02:58,930 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:02:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-08-12 19:02:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-08-12 19:02:58,955 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) [2021-08-12 19:02:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2021-08-12 19:02:58,962 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2021-08-12 19:02:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:58,962 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2021-08-12 19:02:58,962 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) [2021-08-12 19:02:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2021-08-12 19:02:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:02:58,965 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:58,965 INFO L550 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] [2021-08-12 19:02:58,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:02:58,965 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]=== [2021-08-12 19:02:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:58,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1404106583, now seen corresponding path program 1 times [2021-08-12 19:02:58,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:58,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924801026] [2021-08-12 19:02:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:59,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:59,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924801026] [2021-08-12 19:02:59,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924801026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:59,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360055293] [2021-08-12 19:02:59,039 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 [2021-08-12 19:02:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:02:59,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:59,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360055293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:59,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:59,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-12 19:02:59,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009194249] [2021-08-12 19:02:59,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:02:59,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:59,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:02:59,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:02:59,354 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) [2021-08-12 19:02:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:59,562 INFO L93 Difference]: Finished difference Result 2170 states and 12288 transitions. [2021-08-12 19:02:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:02:59,562 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 [2021-08-12 19:02:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:59,575 INFO L225 Difference]: With dead ends: 2170 [2021-08-12 19:02:59,575 INFO L226 Difference]: Without dead ends: 1000 [2021-08-12 19:02:59,577 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:02:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-08-12 19:02:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 614. [2021-08-12 19:02:59,624 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) [2021-08-12 19:02:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 3454 transitions. [2021-08-12 19:02:59,630 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 3454 transitions. Word has length 24 [2021-08-12 19:02:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:59,630 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 3454 transitions. [2021-08-12 19:02:59,631 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) [2021-08-12 19:02:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 3454 transitions. [2021-08-12 19:02:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:02:59,632 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:59,633 INFO L550 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] [2021-08-12 19:02:59,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:59,849 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]=== [2021-08-12 19:02:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:59,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1358128455, now seen corresponding path program 1 times [2021-08-12 19:02:59,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:59,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318511577] [2021-08-12 19:02:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:59,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:59,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318511577] [2021-08-12 19:02:59,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318511577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269594786] [2021-08-12 19:02:59,902 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 [2021-08-12 19:02:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:59,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:03:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:03:00,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269594786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:00,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:00,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-12 19:03:00,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765508584] [2021-08-12 19:03:00,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:03:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:03:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:03:00,070 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) [2021-08-12 19:03:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:00,214 INFO L93 Difference]: Finished difference Result 1661 states and 9454 transitions. [2021-08-12 19:03:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:03:00,215 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 [2021-08-12 19:03:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:00,223 INFO L225 Difference]: With dead ends: 1661 [2021-08-12 19:03:00,224 INFO L226 Difference]: Without dead ends: 930 [2021-08-12 19:03:00,225 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-12 19:03:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 760. [2021-08-12 19:03:00,251 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) [2021-08-12 19:03:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 4299 transitions. [2021-08-12 19:03:00,257 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 4299 transitions. Word has length 24 [2021-08-12 19:03:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:00,257 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 4299 transitions. [2021-08-12 19:03:00,257 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) [2021-08-12 19:03:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 4299 transitions. [2021-08-12 19:03:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:03:00,259 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:00,259 INFO L550 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] [2021-08-12 19:03:00,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:00,477 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]=== [2021-08-12 19:03:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1283985542, now seen corresponding path program 1 times [2021-08-12 19:03:00,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:00,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257866039] [2021-08-12 19:03:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:03:00,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:00,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257866039] [2021-08-12 19:03:00,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257866039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:00,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576364846] [2021-08-12 19:03:00,505 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 [2021-08-12 19:03:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:03:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:03:00,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576364846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:00,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:00,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-12 19:03:00,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246174708] [2021-08-12 19:03:00,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:03:00,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:03:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:03:00,624 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) [2021-08-12 19:03:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:00,812 INFO L93 Difference]: Finished difference Result 2541 states and 14506 transitions. [2021-08-12 19:03:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:03:00,813 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 [2021-08-12 19:03:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:00,824 INFO L225 Difference]: With dead ends: 2541 [2021-08-12 19:03:00,825 INFO L226 Difference]: Without dead ends: 1460 [2021-08-12 19:03:00,826 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-12 19:03:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-08-12 19:03:00,871 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) [2021-08-12 19:03:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2021-08-12 19:03:00,882 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 25 [2021-08-12 19:03:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:00,882 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2021-08-12 19:03:00,883 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) [2021-08-12 19:03:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2021-08-12 19:03:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:03:00,887 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:00,888 INFO L550 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] [2021-08-12 19:03:01,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:01,105 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]=== [2021-08-12 19:03:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:01,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1790951632, now seen corresponding path program 1 times [2021-08-12 19:03:01,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:01,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957895646] [2021-08-12 19:03:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:01,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957895646] [2021-08-12 19:03:01,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957895646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732221819] [2021-08-12 19:03:01,162 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 [2021-08-12 19:03:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:03:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732221819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:01,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:01,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-12 19:03:01,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649870653] [2021-08-12 19:03:01,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:03:01,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:03:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:03:01,381 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) [2021-08-12 19:03:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:01,832 INFO L93 Difference]: Finished difference Result 7038 states and 40203 transitions. [2021-08-12 19:03:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:03:01,833 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 [2021-08-12 19:03:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:01,922 INFO L225 Difference]: With dead ends: 7038 [2021-08-12 19:03:01,922 INFO L226 Difference]: Without dead ends: 5971 [2021-08-12 19:03:01,925 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:03:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-08-12 19:03:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 3455. [2021-08-12 19:03:02,075 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) [2021-08-12 19:03:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 21883 transitions. [2021-08-12 19:03:02,099 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 21883 transitions. Word has length 27 [2021-08-12 19:03:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:02,100 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 21883 transitions. [2021-08-12 19:03:02,100 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) [2021-08-12 19:03:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 21883 transitions. [2021-08-12 19:03:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:03:02,110 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:02,110 INFO L550 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] [2021-08-12 19:03:02,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:02,327 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]=== [2021-08-12 19:03:02,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:02,328 INFO L82 PathProgramCache]: Analyzing trace with hash -97672488, now seen corresponding path program 2 times [2021-08-12 19:03:02,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:02,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738954405] [2021-08-12 19:03:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:03:02,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:02,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738954405] [2021-08-12 19:03:02,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738954405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:02,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807466963] [2021-08-12 19:03:02,358 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 [2021-08-12 19:03:02,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:03:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:03:02,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:02,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807466963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:02,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:02,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-12 19:03:02,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147063252] [2021-08-12 19:03:02,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:03:02,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:02,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:03:02,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:03:02,545 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) [2021-08-12 19:03:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:03,285 INFO L93 Difference]: Finished difference Result 12128 states and 75423 transitions. [2021-08-12 19:03:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:03:03,286 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 [2021-08-12 19:03:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:03,353 INFO L225 Difference]: With dead ends: 12128 [2021-08-12 19:03:03,354 INFO L226 Difference]: Without dead ends: 10635 [2021-08-12 19:03:03,359 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:03:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2021-08-12 19:03:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 6709. [2021-08-12 19:03:03,777 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) [2021-08-12 19:03:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45077 transitions. [2021-08-12 19:03:03,824 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45077 transitions. Word has length 27 [2021-08-12 19:03:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:03,824 INFO L482 AbstractCegarLoop]: Abstraction has 6709 states and 45077 transitions. [2021-08-12 19:03:03,825 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) [2021-08-12 19:03:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45077 transitions. [2021-08-12 19:03:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:03:03,851 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:03,851 INFO L550 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] [2021-08-12 19:03:04,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:04,068 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]=== [2021-08-12 19:03:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 329078829, now seen corresponding path program 3 times [2021-08-12 19:03:04,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:04,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67873096] [2021-08-12 19:03:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:04,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:04,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67873096] [2021-08-12 19:03:04,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67873096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:04,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591462099] [2021-08-12 19:03:04,188 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 [2021-08-12 19:03:04,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:03:04,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:04,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:04,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:04,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591462099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:04,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:04,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:04,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260033160] [2021-08-12 19:03:04,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:04,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:04,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:04,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:04,300 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) [2021-08-12 19:03:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:04,932 INFO L93 Difference]: Finished difference Result 10643 states and 67960 transitions. [2021-08-12 19:03:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:04,933 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 [2021-08-12 19:03:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:05,037 INFO L225 Difference]: With dead ends: 10643 [2021-08-12 19:03:05,037 INFO L226 Difference]: Without dead ends: 8426 [2021-08-12 19:03:05,041 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-08-12 19:03:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6226. [2021-08-12 19:03:05,327 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) [2021-08-12 19:03:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41194 transitions. [2021-08-12 19:03:05,373 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41194 transitions. Word has length 28 [2021-08-12 19:03:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:05,373 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 41194 transitions. [2021-08-12 19:03:05,373 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) [2021-08-12 19:03:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41194 transitions. [2021-08-12 19:03:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:03:05,397 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:05,397 INFO L550 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] [2021-08-12 19:03:05,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:05,614 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]=== [2021-08-12 19:03:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash 589935477, now seen corresponding path program 4 times [2021-08-12 19:03:05,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:05,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311926368] [2021-08-12 19:03:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:05,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:05,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311926368] [2021-08-12 19:03:05,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311926368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:05,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190211916] [2021-08-12 19:03:05,664 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 [2021-08-12 19:03:05,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:03:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:05,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:05,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190211916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:05,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:05,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:05,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426182904] [2021-08-12 19:03:05,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:05,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:05,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:05,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:05,787 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) [2021-08-12 19:03:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:06,588 INFO L93 Difference]: Finished difference Result 11694 states and 73878 transitions. [2021-08-12 19:03:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:06,588 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 [2021-08-12 19:03:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:06,634 INFO L225 Difference]: With dead ends: 11694 [2021-08-12 19:03:06,634 INFO L226 Difference]: Without dead ends: 7762 [2021-08-12 19:03:06,644 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-08-12 19:03:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 6226. [2021-08-12 19:03:06,916 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) [2021-08-12 19:03:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40622 transitions. [2021-08-12 19:03:06,954 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40622 transitions. Word has length 28 [2021-08-12 19:03:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:06,954 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 40622 transitions. [2021-08-12 19:03:06,954 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) [2021-08-12 19:03:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40622 transitions. [2021-08-12 19:03:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:03:06,971 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:06,971 INFO L550 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] [2021-08-12 19:03:07,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:03:07,192 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]=== [2021-08-12 19:03:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash 913623149, now seen corresponding path program 5 times [2021-08-12 19:03:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:07,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559018892] [2021-08-12 19:03:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:07,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:07,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559018892] [2021-08-12 19:03:07,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559018892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:07,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985000119] [2021-08-12 19:03:07,235 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 [2021-08-12 19:03:07,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:03:07,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:07,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985000119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:07,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:07,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:07,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798486711] [2021-08-12 19:03:07,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:07,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:07,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:07,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:07,414 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) [2021-08-12 19:03:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:08,041 INFO L93 Difference]: Finished difference Result 10640 states and 67099 transitions. [2021-08-12 19:03:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:03:08,042 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 [2021-08-12 19:03:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:08,088 INFO L225 Difference]: With dead ends: 10640 [2021-08-12 19:03:08,088 INFO L226 Difference]: Without dead ends: 7656 [2021-08-12 19:03:08,096 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-08-12 19:03:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2021-08-12 19:03:08,419 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) [2021-08-12 19:03:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36114 transitions. [2021-08-12 19:03:08,451 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36114 transitions. Word has length 28 [2021-08-12 19:03:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:08,451 INFO L482 AbstractCegarLoop]: Abstraction has 5654 states and 36114 transitions. [2021-08-12 19:03:08,451 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) [2021-08-12 19:03:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36114 transitions. [2021-08-12 19:03:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:03:08,465 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:08,465 INFO L550 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] [2021-08-12 19:03:08,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 19:03:08,682 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]=== [2021-08-12 19:03:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:08,683 INFO L82 PathProgramCache]: Analyzing trace with hash -317378095, now seen corresponding path program 6 times [2021-08-12 19:03:08,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:08,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030048336] [2021-08-12 19:03:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:08,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030048336] [2021-08-12 19:03:08,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030048336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74113844] [2021-08-12 19:03:08,723 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 [2021-08-12 19:03:08,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:03:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:08,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:08,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74113844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:08,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:08,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:08,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570532350] [2021-08-12 19:03:08,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:08,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:08,896 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) [2021-08-12 19:03:09,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:09,410 INFO L93 Difference]: Finished difference Result 8818 states and 55758 transitions. [2021-08-12 19:03:09,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:09,411 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 [2021-08-12 19:03:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:09,448 INFO L225 Difference]: With dead ends: 8818 [2021-08-12 19:03:09,448 INFO L226 Difference]: Without dead ends: 7190 [2021-08-12 19:03:09,454 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2021-08-12 19:03:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 5368. [2021-08-12 19:03:09,775 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) [2021-08-12 19:03:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34003 transitions. [2021-08-12 19:03:09,807 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34003 transitions. Word has length 28 [2021-08-12 19:03:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:09,807 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 34003 transitions. [2021-08-12 19:03:09,808 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) [2021-08-12 19:03:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34003 transitions. [2021-08-12 19:03:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:03:09,822 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:09,822 INFO L550 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] [2021-08-12 19:03:10,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:10,041 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]=== [2021-08-12 19:03:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash -451391601, now seen corresponding path program 7 times [2021-08-12 19:03:10,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:10,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641479435] [2021-08-12 19:03:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:10,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641479435] [2021-08-12 19:03:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641479435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191431326] [2021-08-12 19:03:10,077 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 [2021-08-12 19:03:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:10,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191431326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:10,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:10,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:10,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593100772] [2021-08-12 19:03:10,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:10,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:10,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:10,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:10,253 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) [2021-08-12 19:03:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:10,860 INFO L93 Difference]: Finished difference Result 7764 states and 48995 transitions. [2021-08-12 19:03:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:10,860 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 [2021-08-12 19:03:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:10,899 INFO L225 Difference]: With dead ends: 7764 [2021-08-12 19:03:10,899 INFO L226 Difference]: Without dead ends: 6512 [2021-08-12 19:03:10,904 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-08-12 19:03:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2021-08-12 19:03:11,189 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) [2021-08-12 19:03:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37653 transitions. [2021-08-12 19:03:11,230 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37653 transitions. Word has length 28 [2021-08-12 19:03:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:11,231 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 37653 transitions. [2021-08-12 19:03:11,231 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) [2021-08-12 19:03:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37653 transitions. [2021-08-12 19:03:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:03:11,247 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:11,247 INFO L550 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] [2021-08-12 19:03:11,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:11,464 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]=== [2021-08-12 19:03:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1791557168, now seen corresponding path program 8 times [2021-08-12 19:03:11,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:11,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861712420] [2021-08-12 19:03:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:11,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861712420] [2021-08-12 19:03:11,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861712420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711748931] [2021-08-12 19:03:11,506 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 [2021-08-12 19:03:11,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:03:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:03:11,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711748931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:11,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:11,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-12 19:03:11,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781844973] [2021-08-12 19:03:11,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:03:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:03:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:03:11,795 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) [2021-08-12 19:03:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:12,700 INFO L93 Difference]: Finished difference Result 13718 states and 86497 transitions. [2021-08-12 19:03:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:12,700 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 [2021-08-12 19:03:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:12,774 INFO L225 Difference]: With dead ends: 13718 [2021-08-12 19:03:12,774 INFO L226 Difference]: Without dead ends: 12948 [2021-08-12 19:03:12,783 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:03:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2021-08-12 19:03:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 9586. [2021-08-12 19:03:13,297 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) [2021-08-12 19:03:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9586 states to 9586 states and 63453 transitions. [2021-08-12 19:03:13,368 INFO L78 Accepts]: Start accepts. Automaton has 9586 states and 63453 transitions. Word has length 29 [2021-08-12 19:03:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:13,368 INFO L482 AbstractCegarLoop]: Abstraction has 9586 states and 63453 transitions. [2021-08-12 19:03:13,368 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) [2021-08-12 19:03:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 9586 states and 63453 transitions. [2021-08-12 19:03:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:03:13,396 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:13,396 INFO L550 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] [2021-08-12 19:03:13,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:03:13,613 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]=== [2021-08-12 19:03:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1011086738, now seen corresponding path program 9 times [2021-08-12 19:03:13,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:13,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478754643] [2021-08-12 19:03:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-12 19:03:13,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:13,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478754643] [2021-08-12 19:03:13,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478754643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:13,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086073804] [2021-08-12 19:03:13,653 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 [2021-08-12 19:03:13,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:03:13,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:03:13,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:13,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086073804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:13,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:13,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-12 19:03:13,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90087887] [2021-08-12 19:03:13,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:13,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:13,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:13,797 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) [2021-08-12 19:03:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:15,816 INFO L93 Difference]: Finished difference Result 25348 states and 162338 transitions. [2021-08-12 19:03:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:03:15,829 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 [2021-08-12 19:03:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:16,085 INFO L225 Difference]: With dead ends: 25348 [2021-08-12 19:03:16,085 INFO L226 Difference]: Without dead ends: 23242 [2021-08-12 19:03:16,130 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:03:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2021-08-12 19:03:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 14272. [2021-08-12 19:03:17,081 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) [2021-08-12 19:03:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 98787 transitions. [2021-08-12 19:03:17,181 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 98787 transitions. Word has length 29 [2021-08-12 19:03:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:17,181 INFO L482 AbstractCegarLoop]: Abstraction has 14272 states and 98787 transitions. [2021-08-12 19:03:17,181 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) [2021-08-12 19:03:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 98787 transitions. [2021-08-12 19:03:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:03:17,227 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:17,227 INFO L550 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] [2021-08-12 19:03:17,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:03:17,444 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]=== [2021-08-12 19:03:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1639971327, now seen corresponding path program 10 times [2021-08-12 19:03:17,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:17,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355820905] [2021-08-12 19:03:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:17,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:17,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355820905] [2021-08-12 19:03:17,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355820905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:17,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636374882] [2021-08-12 19:03:17,474 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 [2021-08-12 19:03:17,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:03:17,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:17,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636374882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:17,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:17,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694203618] [2021-08-12 19:03:17,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:17,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:17,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:17,570 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) [2021-08-12 19:03:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:19,543 INFO L93 Difference]: Finished difference Result 19628 states and 131326 transitions. [2021-08-12 19:03:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:19,543 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 [2021-08-12 19:03:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:19,630 INFO L225 Difference]: With dead ends: 19628 [2021-08-12 19:03:19,630 INFO L226 Difference]: Without dead ends: 16783 [2021-08-12 19:03:19,638 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-08-12 19:03:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 13215. [2021-08-12 19:03:20,268 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) [2021-08-12 19:03:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 90538 transitions. [2021-08-12 19:03:20,368 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 90538 transitions. Word has length 30 [2021-08-12 19:03:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:20,369 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 90538 transitions. [2021-08-12 19:03:20,369 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) [2021-08-12 19:03:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 90538 transitions. [2021-08-12 19:03:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:03:20,410 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:20,410 INFO L550 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] [2021-08-12 19:03:20,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 19:03:20,613 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]=== [2021-08-12 19:03:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:20,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1256865581, now seen corresponding path program 11 times [2021-08-12 19:03:20,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:20,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73694225] [2021-08-12 19:03:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:20,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:20,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73694225] [2021-08-12 19:03:20,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73694225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:20,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776149736] [2021-08-12 19:03:20,647 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 [2021-08-12 19:03:20,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:03:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:20,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:20,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776149736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:20,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:20,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:20,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897983280] [2021-08-12 19:03:20,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:20,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:20,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:20,978 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) [2021-08-12 19:03:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:22,963 INFO L93 Difference]: Finished difference Result 20354 states and 135508 transitions. [2021-08-12 19:03:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:22,964 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 [2021-08-12 19:03:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:23,048 INFO L225 Difference]: With dead ends: 20354 [2021-08-12 19:03:23,048 INFO L226 Difference]: Without dead ends: 15593 [2021-08-12 19:03:23,057 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15593 states. [2021-08-12 19:03:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15593 to 13215. [2021-08-12 19:03:23,817 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) [2021-08-12 19:03:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 89350 transitions. [2021-08-12 19:03:23,902 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 89350 transitions. Word has length 30 [2021-08-12 19:03:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:23,903 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 89350 transitions. [2021-08-12 19:03:23,903 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) [2021-08-12 19:03:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 89350 transitions. [2021-08-12 19:03:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:03:23,939 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:23,939 INFO L550 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] [2021-08-12 19:03:24,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:24,156 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]=== [2021-08-12 19:03:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:24,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1618072385, now seen corresponding path program 12 times [2021-08-12 19:03:24,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:24,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375867775] [2021-08-12 19:03:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:24,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:24,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375867775] [2021-08-12 19:03:24,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375867775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:24,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348878572] [2021-08-12 19:03:24,178 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 [2021-08-12 19:03:24,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:03:24,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:24,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348878572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:24,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:24,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:24,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386258766] [2021-08-12 19:03:24,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:24,297 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) [2021-08-12 19:03:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:26,539 INFO L93 Difference]: Finished difference Result 19164 states and 126429 transitions. [2021-08-12 19:03:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:03:26,539 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 [2021-08-12 19:03:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:26,618 INFO L225 Difference]: With dead ends: 19164 [2021-08-12 19:03:26,618 INFO L226 Difference]: Without dead ends: 16185 [2021-08-12 19:03:26,627 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2021-08-12 19:03:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 12027. [2021-08-12 19:03:27,323 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) [2021-08-12 19:03:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 79680 transitions. [2021-08-12 19:03:27,413 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 79680 transitions. Word has length 30 [2021-08-12 19:03:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:27,413 INFO L482 AbstractCegarLoop]: Abstraction has 12027 states and 79680 transitions. [2021-08-12 19:03:27,413 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) [2021-08-12 19:03:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 79680 transitions. [2021-08-12 19:03:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:03:27,445 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:27,445 INFO L550 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] [2021-08-12 19:03:27,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 19:03:27,661 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]=== [2021-08-12 19:03:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 937421221, now seen corresponding path program 13 times [2021-08-12 19:03:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044696452] [2021-08-12 19:03:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:27,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:27,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044696452] [2021-08-12 19:03:27,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044696452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:27,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065263176] [2021-08-12 19:03:27,857 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 [2021-08-12 19:03:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065263176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:28,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:28,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:28,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482642877] [2021-08-12 19:03:28,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:28,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:28,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:28,010 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) [2021-08-12 19:03:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:29,883 INFO L93 Difference]: Finished difference Result 16785 states and 110647 transitions. [2021-08-12 19:03:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:29,883 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 [2021-08-12 19:03:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:29,961 INFO L225 Difference]: With dead ends: 16785 [2021-08-12 19:03:29,961 INFO L226 Difference]: Without dead ends: 14405 [2021-08-12 19:03:29,968 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14405 states. [2021-08-12 19:03:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14405 to 11433. [2021-08-12 19:03:30,653 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) [2021-08-12 19:03:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 75142 transitions. [2021-08-12 19:03:30,717 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 75142 transitions. Word has length 30 [2021-08-12 19:03:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:30,717 INFO L482 AbstractCegarLoop]: Abstraction has 11433 states and 75142 transitions. [2021-08-12 19:03:30,717 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) [2021-08-12 19:03:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 75142 transitions. [2021-08-12 19:03:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:03:30,779 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:30,779 INFO L550 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] [2021-08-12 19:03:31,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:31,007 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]=== [2021-08-12 19:03:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash -73696029, now seen corresponding path program 14 times [2021-08-12 19:03:31,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:31,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752781966] [2021-08-12 19:03:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:31,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752781966] [2021-08-12 19:03:31,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752781966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170483139] [2021-08-12 19:03:31,029 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 [2021-08-12 19:03:31,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:03:31,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:03:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:31,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170483139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:31,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:31,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:03:31,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022460438] [2021-08-12 19:03:31,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:03:31,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:31,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:03:31,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:03:31,175 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) [2021-08-12 19:03:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:32,984 INFO L93 Difference]: Finished difference Result 15002 states and 98813 transitions. [2021-08-12 19:03:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:03:32,985 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 [2021-08-12 19:03:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:33,054 INFO L225 Difference]: With dead ends: 15002 [2021-08-12 19:03:33,054 INFO L226 Difference]: Without dead ends: 13809 [2021-08-12 19:03:33,060 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13809 states. [2021-08-12 19:03:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13809 to 12621. [2021-08-12 19:03:33,775 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) [2021-08-12 19:03:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12621 states to 12621 states and 83030 transitions. [2021-08-12 19:03:33,858 INFO L78 Accepts]: Start accepts. Automaton has 12621 states and 83030 transitions. Word has length 30 [2021-08-12 19:03:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:33,858 INFO L482 AbstractCegarLoop]: Abstraction has 12621 states and 83030 transitions. [2021-08-12 19:03:33,858 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) [2021-08-12 19:03:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 12621 states and 83030 transitions. [2021-08-12 19:03:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:03:34,142 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:34,142 INFO L550 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] [2021-08-12 19:03:34,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:34,343 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]=== [2021-08-12 19:03:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1100522568, now seen corresponding path program 15 times [2021-08-12 19:03:34,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:34,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715211473] [2021-08-12 19:03:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-12 19:03:34,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715211473] [2021-08-12 19:03:34,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715211473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509780861] [2021-08-12 19:03:34,397 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 [2021-08-12 19:03:34,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:03:34,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:34,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509780861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:34,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:34,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-08-12 19:03:34,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435767846] [2021-08-12 19:03:34,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:03:34,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:03:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:34,599 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) [2021-08-12 19:03:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:39,467 INFO L93 Difference]: Finished difference Result 40050 states and 255845 transitions. [2021-08-12 19:03:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:03:39,467 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 [2021-08-12 19:03:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:39,711 INFO L225 Difference]: With dead ends: 40050 [2021-08-12 19:03:39,711 INFO L226 Difference]: Without dead ends: 37299 [2021-08-12 19:03:39,728 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:03:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37299 states. [2021-08-12 19:03:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37299 to 23827. [2021-08-12 19:03:41,829 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) [2021-08-12 19:03:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23827 states to 23827 states and 164131 transitions. [2021-08-12 19:03:42,242 INFO L78 Accepts]: Start accepts. Automaton has 23827 states and 164131 transitions. Word has length 31 [2021-08-12 19:03:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:42,242 INFO L482 AbstractCegarLoop]: Abstraction has 23827 states and 164131 transitions. [2021-08-12 19:03:42,242 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) [2021-08-12 19:03:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 23827 states and 164131 transitions. [2021-08-12 19:03:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:03:42,311 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:42,311 INFO L550 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] [2021-08-12 19:03:42,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 19:03:42,526 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]=== [2021-08-12 19:03:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:42,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1166394235, now seen corresponding path program 16 times [2021-08-12 19:03:42,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:42,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742432623] [2021-08-12 19:03:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:42,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742432623] [2021-08-12 19:03:42,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742432623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487374907] [2021-08-12 19:03:42,565 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 [2021-08-12 19:03:42,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:03:42,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:03:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:42,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487374907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:42,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:42,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:03:42,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066424454] [2021-08-12 19:03:42,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:03:42,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:42,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:03:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:42,683 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) [2021-08-12 19:03:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:48,008 INFO L93 Difference]: Finished difference Result 37284 states and 244999 transitions. [2021-08-12 19:03:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:03:48,009 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 [2021-08-12 19:03:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:48,175 INFO L225 Difference]: With dead ends: 37284 [2021-08-12 19:03:48,175 INFO L226 Difference]: Without dead ends: 32432 [2021-08-12 19:03:48,191 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32432 states. [2021-08-12 19:03:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32432 to 23826. [2021-08-12 19:03:50,019 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) [2021-08-12 19:03:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23826 states to 23826 states and 162683 transitions. [2021-08-12 19:03:50,170 INFO L78 Accepts]: Start accepts. Automaton has 23826 states and 162683 transitions. Word has length 32 [2021-08-12 19:03:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:50,171 INFO L482 AbstractCegarLoop]: Abstraction has 23826 states and 162683 transitions. [2021-08-12 19:03:50,171 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) [2021-08-12 19:03:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 23826 states and 162683 transitions. [2021-08-12 19:03:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:03:50,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:50,233 INFO L550 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] [2021-08-12 19:03:50,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:50,449 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]=== [2021-08-12 19:03:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash 418167869, now seen corresponding path program 17 times [2021-08-12 19:03:50,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:50,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301213925] [2021-08-12 19:03:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:50,665 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-08-12 19:03:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:50,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:50,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301213925] [2021-08-12 19:03:50,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301213925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:50,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176731430] [2021-08-12 19:03:50,684 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 [2021-08-12 19:03:50,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:03:50,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:03:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:50,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176731430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:50,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:50,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:03:50,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640941605] [2021-08-12 19:03:50,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:50,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:50,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:50,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:50,853 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) [2021-08-12 19:03:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:56,525 INFO L93 Difference]: Finished difference Result 41335 states and 268458 transitions. [2021-08-12 19:03:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:03:56,526 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 [2021-08-12 19:03:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:56,682 INFO L225 Difference]: With dead ends: 41335 [2021-08-12 19:03:56,682 INFO L226 Difference]: Without dead ends: 28816 [2021-08-12 19:03:56,704 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:03:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2021-08-12 19:03:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 21142. [2021-08-12 19:03:58,345 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) [2021-08-12 19:03:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21142 states to 21142 states and 143033 transitions. [2021-08-12 19:03:58,490 INFO L78 Accepts]: Start accepts. Automaton has 21142 states and 143033 transitions. Word has length 32 [2021-08-12 19:03:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:58,491 INFO L482 AbstractCegarLoop]: Abstraction has 21142 states and 143033 transitions. [2021-08-12 19:03:58,491 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) [2021-08-12 19:03:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21142 states and 143033 transitions. [2021-08-12 19:03:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:03:58,549 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:58,549 INFO L550 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] [2021-08-12 19:03:58,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:03:58,765 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]=== [2021-08-12 19:03:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash 791966179, now seen corresponding path program 18 times [2021-08-12 19:03:58,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:58,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670592993] [2021-08-12 19:03:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-12 19:03:58,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:58,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670592993] [2021-08-12 19:03:58,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670592993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:58,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479608807] [2021-08-12 19:03:58,792 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 [2021-08-12 19:03:58,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:03:58,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:03:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:03:58,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479608807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:58,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:58,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:03:58,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142198092] [2021-08-12 19:03:58,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:58,923 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) [2021-08-12 19:04:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:05,950 INFO L93 Difference]: Finished difference Result 44815 states and 287403 transitions. [2021-08-12 19:04:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:04:05,950 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 [2021-08-12 19:04:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:06,150 INFO L225 Difference]: With dead ends: 44815 [2021-08-12 19:04:06,151 INFO L226 Difference]: Without dead ends: 33157 [2021-08-12 19:04:06,173 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:04:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33157 states. [2021-08-12 19:04:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33157 to 20660. [2021-08-12 19:04:08,154 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) [2021-08-12 19:04:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 137146 transitions. [2021-08-12 19:04:08,296 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 137146 transitions. Word has length 32 [2021-08-12 19:04:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:08,296 INFO L482 AbstractCegarLoop]: Abstraction has 20660 states and 137146 transitions. [2021-08-12 19:04:08,296 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) [2021-08-12 19:04:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 137146 transitions. [2021-08-12 19:04:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:04:08,347 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:08,348 INFO L550 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] [2021-08-12 19:04:08,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 19:04:08,561 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]=== [2021-08-12 19:04:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1084222905, now seen corresponding path program 19 times [2021-08-12 19:04:08,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:08,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497791355] [2021-08-12 19:04:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:08,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497791355] [2021-08-12 19:04:08,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497791355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441447899] [2021-08-12 19:04:08,586 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 [2021-08-12 19:04:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:04:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:08,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441447899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:08,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:08,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:04:08,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206644849] [2021-08-12 19:04:08,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:04:08,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:04:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:04:08,702 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) [2021-08-12 19:04:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:15,350 INFO L93 Difference]: Finished difference Result 40134 states and 256717 transitions. [2021-08-12 19:04:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:04:15,351 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 [2021-08-12 19:04:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:15,599 INFO L225 Difference]: With dead ends: 40134 [2021-08-12 19:04:15,600 INFO L226 Difference]: Without dead ends: 29402 [2021-08-12 19:04:15,619 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29402 states. [2021-08-12 19:04:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29402 to 19318. [2021-08-12 19:04:17,326 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) [2021-08-12 19:04:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-08-12 19:04:17,631 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-08-12 19:04:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:17,631 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-08-12 19:04:17,631 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) [2021-08-12 19:04:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-08-12 19:04:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:04:17,683 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:17,683 INFO L550 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] [2021-08-12 19:04:17,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:17,897 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]=== [2021-08-12 19:04:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1022183291, now seen corresponding path program 20 times [2021-08-12 19:04:17,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:17,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966734541] [2021-08-12 19:04:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:17,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:17,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966734541] [2021-08-12 19:04:17,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966734541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:17,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375678769] [2021-08-12 19:04:17,944 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 [2021-08-12 19:04:17,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:04:17,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:17,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:04:17,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:18,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375678769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:18,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:18,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:04:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862301085] [2021-08-12 19:04:18,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:18,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:18,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:18,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:18,083 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) [2021-08-12 19:04:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:23,637 INFO L93 Difference]: Finished difference Result 30265 states and 196281 transitions. [2021-08-12 19:04:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:04:23,638 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 [2021-08-12 19:04:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:23,876 INFO L225 Difference]: With dead ends: 30265 [2021-08-12 19:04:23,876 INFO L226 Difference]: Without dead ends: 27994 [2021-08-12 19:04:23,886 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:04:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27994 states. [2021-08-12 19:04:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27994 to 19318. [2021-08-12 19:04:25,482 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) [2021-08-12 19:04:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-08-12 19:04:25,614 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-08-12 19:04:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:25,614 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-08-12 19:04:25,614 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) [2021-08-12 19:04:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-08-12 19:04:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:04:25,660 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:25,660 INFO L550 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] [2021-08-12 19:04:25,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 19:04:25,873 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]=== [2021-08-12 19:04:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash 13605117, now seen corresponding path program 21 times [2021-08-12 19:04:25,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:25,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234734735] [2021-08-12 19:04:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:25,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:25,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234734735] [2021-08-12 19:04:25,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234734735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:25,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722127484] [2021-08-12 19:04:25,906 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 [2021-08-12 19:04:25,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:04:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:25,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-12 19:04:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722127484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:26,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:26,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-12 19:04:26,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8703101] [2021-08-12 19:04:26,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:26,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:26,045 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) [2021-08-12 19:04:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:34,486 INFO L93 Difference]: Finished difference Result 45487 states and 293130 transitions. [2021-08-12 19:04:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:04:34,487 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 [2021-08-12 19:04:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:34,721 INFO L225 Difference]: With dead ends: 45487 [2021-08-12 19:04:34,721 INFO L226 Difference]: Without dead ends: 40798 [2021-08-12 19:04:34,740 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 19:04:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40798 states. [2021-08-12 19:04:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40798 to 22218. [2021-08-12 19:04:36,824 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) [2021-08-12 19:04:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149668 transitions. [2021-08-12 19:04:37,224 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149668 transitions. Word has length 32 [2021-08-12 19:04:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:37,224 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149668 transitions. [2021-08-12 19:04:37,224 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) [2021-08-12 19:04:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149668 transitions. [2021-08-12 19:04:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:04:37,275 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:37,275 INFO L550 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] [2021-08-12 19:04:37,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:37,491 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]=== [2021-08-12 19:04:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:37,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1536238151, now seen corresponding path program 22 times [2021-08-12 19:04:37,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:37,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659595313] [2021-08-12 19:04:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:37,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659595313] [2021-08-12 19:04:37,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659595313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842392335] [2021-08-12 19:04:37,519 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 [2021-08-12 19:04:37,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:04:37,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:04:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:37,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842392335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:37,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:37,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:04:37,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424314889] [2021-08-12 19:04:37,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:04:37,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:37,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:04:37,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:04:37,640 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) [2021-08-12 19:04:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:45,097 INFO L93 Difference]: Finished difference Result 41989 states and 272496 transitions. [2021-08-12 19:04:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:04:45,097 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 [2021-08-12 19:04:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:45,415 INFO L225 Difference]: With dead ends: 41989 [2021-08-12 19:04:45,415 INFO L226 Difference]: Without dead ends: 33040 [2021-08-12 19:04:45,433 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:04:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33040 states. [2021-08-12 19:04:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33040 to 22218. [2021-08-12 19:04:47,658 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) [2021-08-12 19:04:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149116 transitions. [2021-08-12 19:04:47,827 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149116 transitions. Word has length 32 [2021-08-12 19:04:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:47,828 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149116 transitions. [2021-08-12 19:04:47,828 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) [2021-08-12 19:04:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149116 transitions. [2021-08-12 19:04:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:04:47,884 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:47,884 INFO L550 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] [2021-08-12 19:04:48,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:04:48,097 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]=== [2021-08-12 19:04:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash -339950933, now seen corresponding path program 23 times [2021-08-12 19:04:48,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:48,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864988092] [2021-08-12 19:04:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:48,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864988092] [2021-08-12 19:04:48,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864988092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914064347] [2021-08-12 19:04:48,151 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 [2021-08-12 19:04:48,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:04:48,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:04:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:48,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914064347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:48,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:48,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:04:48,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086215503] [2021-08-12 19:04:48,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:04:48,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:48,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:04:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:04:48,326 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) [2021-08-12 19:04:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:55,347 INFO L93 Difference]: Finished difference Result 37139 states and 242040 transitions. [2021-08-12 19:04:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:04:55,347 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 [2021-08-12 19:04:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:55,533 INFO L225 Difference]: With dead ends: 37139 [2021-08-12 19:04:55,533 INFO L226 Difference]: Without dead ends: 33280 [2021-08-12 19:04:55,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:04:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2021-08-12 19:04:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 21666. [2021-08-12 19:04:57,615 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) [2021-08-12 19:04:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21666 states to 21666 states and 143823 transitions. [2021-08-12 19:04:58,029 INFO L78 Accepts]: Start accepts. Automaton has 21666 states and 143823 transitions. Word has length 32 [2021-08-12 19:04:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:58,029 INFO L482 AbstractCegarLoop]: Abstraction has 21666 states and 143823 transitions. [2021-08-12 19:04:58,029 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) [2021-08-12 19:04:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21666 states and 143823 transitions. [2021-08-12 19:04:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:04:58,151 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:58,151 INFO L550 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] [2021-08-12 19:04:58,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:04:58,370 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]=== [2021-08-12 19:04:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:58,371 INFO L82 PathProgramCache]: Analyzing trace with hash -277911319, now seen corresponding path program 24 times [2021-08-12 19:04:58,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:58,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125456874] [2021-08-12 19:04:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-12 19:04:58,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125456874] [2021-08-12 19:04:58,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125456874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892474811] [2021-08-12 19:04:58,427 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 [2021-08-12 19:04:58,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:04:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:04:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 19:04:58,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892474811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:58,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:58,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:04:58,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541283823] [2021-08-12 19:04:58,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:04:58,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:58,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:04:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:04:58,679 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)